Honors Biology Final Pratice Questions

Q: best explain the function of a contractile vacuole?

maintains homeostasis by regulating an organism\'s water content

question

Some prokaryotic and eukaryotic cells have a cellular structure called a flagella. What is the purpose of the flagella?

answer

to propel the cell through liquid

question

What is the function of the eyespot?

answer

It detects light, which allows the euglena to obtain energy and make food.

question

Some cells are covered in cilia, which are tiny hair-like structures. What are two functions of cilia?

answer

movement and obtaining food

question

Which of the following describes the fundamental difference between prokaryotic and eukaryotic cells?

answer

Prokaryotic cells do not have a true nucleus or membrane-bound organelles.

question

Some prokaryotes and eukaryotes have whip-like projections that help propel the cell through liquid. What is the name of this whip-like projection?

answer

a flagellum

question

Scientists often use cellular evidence in order to classify or group organisms. What is the best way to distinguish very simple organisms, such as bacteria, from more complex organisms, such as protists, plants, and animals?

answer

by cell type, such as prokaryotic versus eukaryotic

question

Avery is examining cells under the microscope. She is using the 40x objective to view the slide with a 10x eyepiece

answer

400x

question

How does the size of a eukaryotic organism normally compare to the size of a prokaryotic organism?

answer

Eukaryotes are usually much larger than prokaryotes.

question

best explain the function of a contractile vacuole?

answer

maintains homeostasis by regulating an organism's water content

question

The presence of a nucleus suggests that Euglena are

answer

eukaryotic

question

The fingerlike projections on the surface of the cell are called cilia and are used in what processes?

answer

locomotion

question

Many protozoa have tiny hair-like structures that beat back and forth to aid a protozoa's movement. What are these hair-like structures called?

answer

cilia

question

What cell part does an amoeba use for locomotion?

answer

pseudopod

question

How does the DNA in prokaryotic cells differ from the DNA in eukaryotic cells?

answer

Prokaryotic DNA is not separated from the rest of the cell by a nuclear membrane. Prokaryotic DNA is not packaged into chromosomes.

question

describe the difference between prokaryotic and eukaryotic cells?

answer

Eukaryotic cells are more complex than prokaryotic cells because eukaryotic cells contain membrane-bound organelles.

question

The inner membrane of the mitochondrion is folded into cristae. The cristae _______ the surface area of the inner membrane and _______ the mitochondrion's ability to produce ATP through the process of _______.

answer

increase; enhance; cellular respiration

question

Eukaryotic cells contain organelles that harvest energy from organic compounds to make ATP. ATP is the main form of energy used by cells. Which cell organelles are responsible for making most of the cell's ATP?

answer

mitochondria

question

Where in a plant cell is glucose produced?

answer

in the chloroplasts

question

Why do cellular organelles have different structures?

answer

The structures of cellular organelles are related to their functions.

question

Through the process of simple diffusion, materials move across a cell membrane

answer

from an area of higher concentration to an area of lower concentration.

question

Carlos is studying different types of transport in cells. He learns that water molecules commonly cross the cell membrane. Which type of transport does water use to cross the cell membrane?

answer

osmosis, which is a type of passive transport

question

_______ is the passive movement of water molecules across a cell membrane.

answer

Osmosis

question

Osmosis involves the movement of water molecules across a cell membrane. Diffusion involves the movement of substances other than water across a cell membrane. In both of these processes, substances move from an area of high concentration to an area of low concentration. Thus, both diffusion and osmosis are forms of _______.

answer

passive transport

question

Cell membranes are selectively permeable. This means that

answer

some substances can move freely across the cell membrane, while others must be transported.

question

Through the process of _______, materials move across a cell membrane from an area of higher concentration to an area of lower concentration.

answer

diffusion

question

Three distinct layers are present in the gastrula stage the endoderm the mesoderm the ectoderm These layers develop into specific cells within the body through the process of _______.

answer

cell differentiation

question

Which of the following occurs during the interphase stage of the cell cycle? I. DNA is replicated. II. The cell divides. III. The cell grows in size.

answer

I and III only

question

Which of the following is true of the various types of cells found in an individual multicellular organism? I. Every cell performs the same function. II. Almost all of the cells have the same DNA. III. Different genes are expressed in different cells. IV. The same genes are expressed in every cell. V. Each cell has completely different DNA.

answer

II and III only

question

The cytoplasm and two nuclei that are formed during mitosis are separated into two identical daughter cells during _______.

answer

cytokinesis

question

Through what process do cells become specialized so they can perform specific functions within organisms?

answer

differentiation

question

Anna often finds that she becomes drowsy in the afternoons. The warmer her classroom is, the harder she finds it to stay awake. Why does warmth make her more tired?

answer

Her body produces less energy in order to keep her from overheating.

question

When dry environmental conditions exist, guard cells reduce water loss from plants by closing the openings in their leaves. This process is an example of a feedback mechanism that plants use in order to

answer

maintain homeostasis.

question

An organism's ability to maintain a stable internal environment in the midst of external environmental change is known as

answer

homeostasis.

question

The cells of a plant root are specialized mostly to aid in the

answer

absorption of water and nutrients.

question

Cell specialization in the human body is usually due to

answer

different cells within the human body exhibiting different patterns of gene expression.

question

The nucleotide of DNA is one large molecule composed of three smaller molecules. What set of molecules bond together to form a nucleotide?

answer

deoxyribose, a nitrogen base, a phosphate group

question

The main purpose of DNA is to store information. Where is information stored within a DNA molecule?

answer

in the sequence of nitrogen bases

question

How are complementary strands of DNA held together?

answer

with hydrogen bonds connecting complementary bases

question

Cells store genetic information in DNA. That genetic information is used to synthesize _______.

answer

proteins

question

Each nucleotide of a DNA molecule is made of deoxyribose, a phosphate group, and

answer

a nitrogen base.

question

A sequence of nucleotides is shown below. ATGAAAGCCTATGCACCA What does this sequence provide coding for?

answer

proteins

question

DNA contains all the information a cell needs in order to make certain proteins. Where are the protein-synthesizing instructions stored on a DNA molecule?

answer

Certain sequences of nucleotides code for the production of specific proteins.

question

How are complementary strands of DNA held together?

answer

with hydrogen bonds connecting complementary bases

question

Cells store genetic information in DNA. That genetic information is used to synthesize _______.

answer

proteins

question

What are the three main components of a DNA molecule?

answer

a sugar, a phosphate group, and a nitrogenous base

question

The shape of a DNA strand is best described as

answer

a double helix

question

How are the instructions coded by DNA translated into an organism's physical traits?

answer

Instructions coded by DNA sequences are translated into proteins which express an organism's physical traits.

question

AB blood type is an example of __________.

answer

codominance

question

Hemophilia A is a sex-linked recessive disease. If a mother without the disease and a father without the disease have one son diagnosed with hemophilia, what is the probability that a future daughter they have together will also be afflicted with hemophilia?

answer

0%

question

Mrs. Smith has blood type A. Her father has blood type A, and her mother has blood type B. If Mr. Smith has blood type AB, what is the probability that they will have a child with blood type AB?

answer

25%

question

Carla receives an allele for blue eyes from her mother, and an allele for brown eyes from her father. If brown eye color is a dominant trait and blue eye color is a recessive trait, what can be determined about the color of Carla's eyes?

answer

Carla has brown eyes.

question

A cross between two squash plants that produce yellow squash results in 124 offspring: 93 produce yellow squash and 31 produce green squash. What are the likely genotypes of the plants that were crossed?

answer

both Yy

question

Suppose that a certain breed of cat can have black, gray, or white fur. Black fur is dominant, white fur is recessive, and gray fur is intermediate (i.e., cats with gray fur possess one allele for black fur and one for white fur). If a gray cat and a white cat have kittens, what phenotypes could the kittens exhibit?

answer

gray or white fur

question

An organism's genotype can best be defined as its

answer

inherited combination of alleles

question

Errors that are made during DNA replication may result in

answer

mutations

question

Sometimes, during the process of replication, the DNA code is copied incorrectly, and an incorrect nucleotide is attached to the new strand of DNA. This incorrect copy is known as a

answer

mutation.

question

______ is a source of genetic variation that involves the swapping of sections of chromosomes during meiosis.

answer

Crossing over

question

A mutation occurs in a brain cell. This mutation will be passed on to

answer

cells produced when the mutant cell divides.

question

Unique heritable characteristics can result from I. mutations of genes in an organism's sex cells. II. mutations of genes in an organism's body cells. III. recombination of existing genes during sexual reproduction. IV. replication of existing genes during asexual reproduction.

answer

I and III only

question

Which of the following are possible results of exposure to radiation or toxic chemicals? I. DNA mutations occur in body cells and cancer develops. II. DNA mutations occur in body cells and are passed on to offspring. III. The exposed organism becomes sterile. IV. DNA mutations occur in gametes and birth defects result.

answer

I, III, and IV only

question

Cancer is a disease that usually results when

answer

mutations cause a person's body cells to divide uncontrollably.

question

in 1996, a group of scientists from Scotland used a somatic (non-sex) cell of an adult sheep to produce an identical copy of that sheep. The process through which a genetically identical cell or organism is produced is known as _______.

answer

cloning

question

What have scientists found to be the most efficient and effective way to insert new sequences into an individual?

answer

Scientists use viruses to insert specific gene sequences.

question

By comparing DNA profiles, scientists can learn

answer

whether the species are related.

question

What was produced as a result of the Human Genome Project?

answer

a gene map of the human genome

question

Which of the following techniques separates molecules based on size?

answer

gel electrophoresis

question

Just like actual fingerprints, DNA fingerprints are unique to most individuals (other than identical twins). Today, most police departments in the United States use DNA fingerprints as a criminal investigation tool. What is another application of DNA fingerprints?

answer

identifying the father of a child

question

A cell's work is carried out by the many different types of molecules it assembles. _________ are especially important because they are involved in a variety of processes, such as cell signaling, immune response, and enzyme activity.

answer

Proteins

question

Protein molecules are composed of long chains of _______.

answer

amino acids

question

What is true about protein molecules?

answer

The shape and folded structure of a protein molecule are important in determining its function.

question

There are twenty standard amino acids that make up all proteins. What four elements are found in all amino acids?

answer

carbon, hydrogen, oxygen, and nitrogen

question

A student is given a small amount of unknown tan-colored liquid substance. This unknown liquid is placed into a glass of water and mixed. Despite mixing, the tan liquid remains separated from the water and collects as a large droplet at the top. Which of the macromolecule groups is this liquid MOST likely to be a member of?

answer

lipids

question

Carbohydrates, such as glucose, are excellent sources of immediate energy for living organisms. More complex carbohydrates, such as glycogen and starch, can also be used for the long term storage of energy. However, carbohydrates play other vital roles, too. Which of the following describes another common use for carbohydrates?

answer

Cellulose is used as a structural component in plant cell walls.

question

describe a carbohydrate.

answer

Carbohydrates are organic macromolecules that are made up of carbon, hydrogen, and oxygen atoms and are used for energy storage or as structural molecules.

question

Organic macromolecules called _______ are insoluble in water, are often found in biological membranes and other waterproof coverings, and have the ability to store energy for extended periods of time.

answer

lipids

question

Nucleic acids, proteins, and other large biological molecules are known as polymers because

answer

they contain many small, repeating subunits bonded together.

question

During photosynthesis, plants take in light energy from the Sun, carbon dioxide from the air, and water through their roots to produce

answer

sugar and oxygen.

question

Cellular respiration occurs in the __________.

answer

mitochondrion

question

______ and ________ are reactants in the process of cellular respiration.

answer

glucose and oxygen

question

Which of the following is the only cell organelle that is capable of converting light energy into chemical energy?

answer

chloroplast

question

During _________, energy from the Sun is stored in the bonds of sugar molecules.

answer

photosynthesis

question

Eukaryotic cells contain organelles that harvest energy from organic compounds to make ATP. ATP is the main form of energy used by cells. Which cell organelles are responsible for making most of the cell's ATP?

answer

mitochondria

question

When the water availability of a plant's environment decreases, the plant can respond by closing its stomata. This reduces the amount of water that the plant loses through its leaves due to transpiration. Closing the stomata also reduces the amount of carbon dioxide that the plant can take in through its leaves, which will most likely result in

answer

a decreased rate of photosynthesis.

question

What processes require the chloroplasts and mitochondria to interact with one another?

answer

photosynthesis and respiration

question

During photosynthesis, plant cells take in carbon dioxide, CO2, and release oxygen, O2. How is this different from cellular respiration?

answer

During cellular respiration, cells use oxygen to break down glucose and release CO2, H2O, and ATP.

question

What is true about the flow of energy within ecosystems?

answer

Energy flows both ways between living systems and the physical environment.

question

Plants and other photosynthetic organisms get their energy __________ from the Sun by absorbing the light and using it to create energy-rich __________ such as glucose.

answer

directly, carbohydrates

question

During the process of photosynthesis, plants change __________ from the Sun into _________, which is stored in the bonds of carbohydrate molecules.

answer

radiant energy, chemical energy

question

In the nitrogen cycle, bacteria combine nitrogen gas with hydrogen to form ammonia in the process of _______.

answer

nitrogen fixation

question

Oxygen is consumed when I. plants perform photosynthesis. II. land is cleared for farming by burning forests. III. plants or animals perform cellular respiration. IV. aerobic bacteria break down dead algae in a pon

answer

II, III, and IV only

question

Decomposers are a necessary part of a healthy ecosystem because they

answer

return nutrients to the environment so matter and energy can begin another cycle.

question

After birth, many mammals, such as humans, cats, and dogs, tend to suck things that touch the roof of their mouth. This is known as suckling and is

answer

an instinctive response. awkward question

question

Grizzly bears in Yellowstone National Park have become repeatedly exposed to human beings, such as campers and hikers. These grizzly bears no longer exhibit a fear response to humans because

answer

they have become habituated to human contact.

question

When a group of young geese watch the first thing they see after being born in order to learn behaviors, they are _______.

answer

imprinting

question

During certain periods of the year, some species of rodents instinctively enter a state of inactivity characterized by lowered metabolism and body temperature. This state is known as _______.

answer

death jk hibernation

question

Amanda is studying insects and their responses to light. She places several types of insects in a container in a dark room. She then shines a flashlight in one corner of the container. After a few minutes, she notices that all of the moths she has placed in the container are staying near the light. Which of the following is true?

answer

Moths show a positive response to light think about your front porch when you turn on the lights and when you get attacked when you walk out to door!!!

question

Some types of organisms can increase genetic variation through reproduction. They are able to combine the genetic material of two parents, rather than copying the genetic material of a single parent. Which organisms are capable of this?

answer

both plants and animals

question

A mammal lives in an environment with warm summers and long, cold winters in which food is difficult to find. Which of the following behavioral adaptations would this mammal be the most likely to have?

answer

hibernating during the winter

question

Pelicans are large birds that usually live near water. They have large, expandable pouched bills, which are useful for _______.

answer

catching fish. Think finding nemo!!!

question

A tick attaches to the flesh of a dog and feeds on the dog's blood for energy. This negatively impacts the dog by causing it discomfort and removing nutrients that the dog's body could have used for life processes, but it does not kill the dog.

answer

parasitism.

question

Male birds of paradise are known to sometimes dance and throw feathers over their body when females are present. This behavior is the bird of paradise's method of _______.

answer

courtship

question

Sometimes a bee will perform a maneuver, known as the \"waggle dance,\" in front of another bee. What is the purpose of this maneuver?

answer

to help bees cooperate

question

A lion hunts, kills, and feeds on a zebra. The lion is an example of a _______, and the zebra is its _______.

answer

predator; prey in that order!

question

Honeybees need the nectar of flowering plants in order to produce honey. How can a honeybee's relationship with flowering plants be considered mutualism?

answer

The bees help pollinate the plants.

question

Organisms in an ecosystem must either produce their own energy or receive energy from other organisms. The biological interaction in which one organism hunts, kills, and eats another organism for energy is known as _______.

answer

predation

question

An ecological interaction in which both organisms involved receive a benefit is known as

answer

mutualism.

question

Which of the following interactions is an example of symbiosis?

answer

an insect acts as a pollinator for a plant species

question

A farmer plants two species of grass with similar nutrient needs on the same small plot of land. What kind of interaction will most likely occur between the two species?

answer

competition

question

Plants require nitrogen and phosphorous but cannot efficiently absorb these nutrients from the soil. Instead, they obtain the nutrients through fungi that live in their roots. In return, the fungi have access to carbohydrates manufactured by the plants. Without the fungi, plants would not be healthy and abundant, and the food supply of all of the organisms in the ecosystem would be in danger. This is an example of how _________ relationships maintain balance within an ecosystem.

answer

symbiotic

question

all organisms in every environment _____________

answer

They must compete for essential resources.

question

Living organisms are capable of producing populations of infinite size. However, in actuality, this does not occur because population sizes are limited by _______.

answer

environmental conditions organism interactions and behaviors the availability of resources

question

What would have the greatest impact on the amount of dirt, oil and other contaminants added to the streams and lakes near a large urban area?

answer

construction of a large mall and parking lot

question

What would most likely contribute to lowering the carrying capacity of a population?

answer

a decrease in habitats due to human development or natural disasters

question

What reduces the consumption of raw materials?

answer

the use of energy-efficient appliances the use of smaller automobiles recycling plastics, glass, aluminum, and paper

question

Which of the following is a way in which acid rain affects the environment? I. lakes become too acidic to support life II. essential minerals leach out of the soil III. components become concentrated in bodies of animals IV. trees die as a result of tissue damage

answer

I, II, and IV only

question

Surface runoff from agriculture and other sources can pollute groundwater and surface water. In what way can this be harmful to humans?

answer

These pollution sources can add disease-causing organisms or toxic substances to groundwater and surface water, which are used by humans for drinking water.

question

How might an environment be affected if humans introduce a new type of plant to the environment?

answer

The plant may compete with other plants for light. The plant may be poisonous and harmful to animals. The plant may become another food source for animals.

question

In which of the following ways might humans negatively impact the environment? I. depleting the natural resources of the environment II. destroying habitats to make room for a growing population III. planting more trees to make up for those previously cut down

answer

I and II only

question

Carbon dioxide dissolves in water to form carbonic acid. This acid lowers the pH of the water and makes the water corrosive. What is likely to happen if carbon dioxide levels in the atmosphere increase?

answer

Acid rain will erode buildings and lower the pH of the ocean.

question

Most modern forms of transportation are powered by fossil fuels. Carbon dioxide, methane, carbon monoxide, and other gases are released into the atmosphere during the production and combustion of these fuels. How might these gases cause climatic changes?

answer

These gases reduce the amount of thermal energy escaping into space, effectively warming the atmosphere.

question

In order to better understand similarities and differences among biological organisms, scientists developed a system of classification. Initially, the system only consisted of two kingdoms - Animalia and Vegetabilia. Now, there are six kingdoms - Eubacteria, Archaebacteria, Protista, Fungi, Plantae, and Animalia. This demonstrates that

answer

systems of classification are adaptable.

question

The earliest classification systems grouped organisms based on _______. Since then, newer classification systems have used _______ to better understand evolutionary ancestry.

answer

anatomical similarities; genetic analysis

question

Fur seals and sea lions have similar body shapes and features. Based on their anatomy, they seem to have a relatively recent common evolutionary ancestor. What further evidence would best substantiate that the two animals have a recent common ancestor?

answer

The animals have very similar sequences in their DNA.

question

Which of the following is hypothesized to be the early source of free oxygen in Earth's atmosphere?

answer

photosynthesis by cyanobacteria

question

The first organisms on Earth appeared approximately 3.5 billion years ago, and all were all unicellular. Multicellular organisms have only existed for about one billion years. What evolutionary milestone made it possible for more complex, multicellular organisms to exist?

answer

appearance of eukaryotic cells

question

A particular environment has enough food to support 50 rats through the winter. At the end of winter one year, there are 25 female rats and 25 male rats. Each of the 25 females gives birth to several litters of 3-6 pups each. In the fall, there are 300 rats. Ignoring the effects of predators and disease, what will happen to this population of rats between fall and the next spring?

answer

The fifty rats best able to get and keep food will survive to reproduce next spring.

question

The source of genetic variation that occurs during meiosis and results in new combinations of alleles is known as _______.

answer

genetic recombination

question

The main tenets of Darwin's theory of evolution by natural selection include: I. Individuals can produce more offspring than can survive. II. The traits within a population vary and are heritable. III. Traits acquired during an individual's lifetime are heritable. IV. Individuals compete for resources. V. Individuals most adapted to their environments have a better chance of surviving to reproduce.

answer

I, II, IV, and V only

question

A population of mammals originally lived in a certain area surrounded by land. Then, some of the organisms were taken to an island. These two populations remained separated for hundreds of years.

answer

The organisms on the island are slightly different than those on the mainland.

question

What is an example of something that resulted from a genetic variation that was favored by natural selection?

answer

the long neck of a giraffe

question

Speciation is the process by which new species

answer

are formed.

question

Imagine an earthquake creates a chasm that separates a population of squirrels. The two populations of squirrels evolve into two separate species. What is the name of the process by which isolated populations of the same species become new species?

answer

speciation

question

Organisms with traits that are well-suited to an environment tend to survive and reproduce at a greater rate than organisms that are less suited to an environment. This phenomena is known as _______.

answer

natural selection

question

All organisms that sexually reproduce exhibit behavior that encourages reproductive activities from the opposite sex. Why would this form of behavior most likely be naturally selected?

answer

Organisms that have behaviors that encourage reproduction would be more likely to reproduce.

question

In living organisms, DNA consists of

answer

double helix

question

Genes are sections of DNA that contain information to make a protein. Genes can be turned on or off to control the protein

answer

Injury repair may occur more quickly.

question

The sequence of bases on one strand of a DNA molecule is ATTGCCCATG. What will be the sequence on the complementary strand?

answer

TAACGGGTAC

question

In which of the following ways does genetic information typically flow in an organism?

answer

DNA RNA proteins

question

What are the three main components of a DNA molecule?

answer

a sugar, a phosphate group, and a nitrogenous base

question

Which of the following best describes the product of RNA translation?

answer

a protein

question

Each nucleotide of a DNA molecule is made of deoxyribose, a phosphate group, and

answer

a nitrogen base.

question

The DNA sequences that make up the genetic code of an organism determine which traits the organism will exhibit. How are the instructions coded by DNA translated into an organism's physical traits?

answer

Instructions coded by DNA sequences are translated into proteins which express an organism's physical traits.

question

The type of RNA that transfers amino acids to growing polypeptide chains during translation is known as

answer

tRNA.

question

The instructions for building proteins necessary for all life functions are coded within an organism's genetic code. The genetic code of an organism consists of codons, or sequences of three nucleotides, that each code for a specific amino acid. Amino acids are the building blocks of proteins. The amino acids coded by specific codons

answer

are almost universal among all living things.

question

From the list below, select the items that are used during RNA translation. I. mRNA II. tRNA III. ribosome IV. amino acid

answer

I, II, III, and IV

question

The nucleotide of DNA is one large molecule composed of three smaller molecules. Which of the following sets of molecules bond together to form a nucleotide?

answer

deoxyribose, a nitrogen base, a phosphate group

question

How are complementary strands of DNA held together?

answer

with hydrogen bonds connecting complementary bases

question

During the process, the two strands of one DNA molecule are unwound. Then, DNA polymerases add complementary nucleotides to each strand which results in the formation of two identical DNA molecules. This process is known as DNA _______.

answer

replication

question

During transcription, enzymes bind to a molecule of DNA. Then, the enzymes unwind and separate the DNA's double helical strands. As the molecule unwinds, complementary nucleotides pair with one of the DNA strands to form

answer

an RNA molecule.

question

The sequence of bases on one strand of a DNA molecule is ATTGCCCATG. What will be the sequence on the complementary strand?

answer

TAACGGGTAC

question

All the information necessary for an organism to form and grow is recorded in the organism's DNA. How does DNA use its stored information to express a trait?

answer

The genes in the DNA instruct the cell to synthesize proteins.

question

Cells store genetic information in DNA. That genetic information is used to synthesize _______.

answer

proteins

question

Which choice below correctly shows the base pairing rules in DNA?

answer

A - T G - C

question

Which of the following correctly describes the components of DNA?

answer

DNA is made up of nucleotides consisting of the sugar deoxyribose, a phosphate, and one of four nitrogenous bases.

question

All the information necessary for an organism to form and grow is recorded in the organism's DNA. How does DNA use its stored information to express a trait?

answer

The genes in the DNA instruct the cell to synthesize proteins.

question

When mitosis occurs, the DNA inside the cell's nucleus must replicate. The new cell that is formed has an identical copy of its parent cell's DNA. That means it has the same information coded in its genes. During DNA replication, how is an accurate new copy of DNA formed?

answer

DNA polymerases add nucleotides to the exposed base pairs according to base-pairing rules.

question

The DNA sequences that make up the genetic code of an organism determine which traits the organism will exhibit. How are the instructions coded by DNA translated into an organism's physical traits?

answer

Instructions coded by DNA sequences are translated into proteins which express an organism's physical traits.

question

The main purpose of DNA is to store information. Where is information stored within a DNA molecule?

answer

in the sequence of nitrogen bases

question

According to the DNA base-pairings rules, adenine (A) always forms bonds with _______ and cytosine (C) always forms bonds with _______.

answer

thymine (T); guanine (G)

question

When a cell needs a particular protein synthesized, messenger RNA (mRNA) is produced from DNA through transcription. What is the maximum number of amino acids that could be coded for in the following section of mRNA: UGAUUCAGUAAC?

answer

4

question

DNA contains all the information a cell needs in order to make certain proteins. Where are the protein-synthesizing instructions stored on a DNA molecule?

answer

Certain sequences of nucleotides code for the production of specific proteins.

question

The DNA sequences that make up the genetic code of an organism determine which traits the organism will exhibit. How are the instructions coded by DNA translated into an organism's physical traits?

answer

Instructions coded by DNA sequences are translated into proteins which express an organism's physical traits.

question

DNA is a type of _______ that contains the genetic instructions of an organism's development and functioning.

answer

nucleic acid

question

A sequence of nucleotides is shown below. ATGAAAGCCTATGCACCA What does this sequence provide coding for?

answer

proteins

Honors Biology Final Pratice Questions

Unlock all answers in this set

Haven't found what you were looking for?

Search for samples, answers to your questions and flashcards