Biology Chapters 8 and some of 10

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The creation of offspring carrying genetic information from just a single parent is called ____
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A) asexual reproduction
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Which one of the following is a a difference between sexual and asexual reproduction?
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D) sexual reproduction is more likely to increase genetic variation than is asexual reproduction
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Strictly speaking, the phrase, ” like begets like” refers to
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Asexual reproduction only
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With the exception of identical twins , siblings who have the same 2 biological parents are likely to look similar but not identical to each other because they have _____
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A similar but not identical combination of genes
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Virchow’s simple and profound principle, stated formally in 1858, was that ____
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Every cell forms a cell
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Which one of the following is false? Cell division _____
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Is common is eukaryotes but rare in prokaryotes
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Which one of he following is false?
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Prokaryotic chromosomes are more complex than those of eukaryotes
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Sister chromatids are___
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Tightly linked together at a centromere
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Compared to prokaryotic chromosomes, eukaryotic chromosomes _____
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Are housed in a membrane-enclosed nucleus
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Prior to mitosis, each chromosome of a eukaryotic cell consists of a pair of identical structures called ____
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Sister chromatids
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Which of the following help maintain the structure of chromosomes and control the activity of genes?
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Proteins
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Eukaryotic cells spend most of their cell cycle in which phase?
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Interphase
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The process by which the cytoplasm of a eukaryotic cell divides to produce 2 cells is called
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Cytokinesis
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If the S phase was eliminated from the cell cycle, the daughter cells would _____
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Have half the genetic material found in the parental cell
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Which of the following occurs during interphase?
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Cell growth and duplication of the chromosomes
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Looking into your microscope, you spot an unusual cell. Instead of the typical rounded cell shape, the cell has a bee narrow middle separating 2 bulging ends. It sort of looks like the number 8! Then you realize this is a cell
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Undergoing cytokinesis
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The phase of mitosis during which the nuclear envelope fragments and the nucleoli disappear is called
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Prophase
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During which phase of mitosis do the chromosomes line up on a plane located equidistant from the 2 spindle poles?
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Metaphase
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Which of the following does NOT occur during mitotic anaphase ?
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The chromatid DNA replicates
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During which phase of mitosis does the nuclear envelope re-form and the nucleoli reappear?
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Telophase
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Which of the following is a feature of plant cell division that distinguishes it from animal cell division?
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A cell plate forms
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Which of the following is likely to account for the difference between plant and animal cell cytokinesis?
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Plant cell division must maintain the integrity of the cell wall.
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Which of the following must occur for a plant or animal to grow and develop normally?
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It just be able to control the timing and rate of cell Division in different parts of its body
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When animal cells are grown in a Petri dish, they typically stop dividing once they have formed a single, unbroken layer on the bottom of the dish. This arrest of division of an example of
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Density-dependent inhibition
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Which of the following is probably the main factor responsible for the phenomenon of density-dependent inhibition?
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A shortage of growth factors
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As a patch of scraped skin heals, the cells fill in the injured area but do not grow beyond that. This is an example of ____
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Density-dependent inhibition
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Mature human nerve cells and muscle cells are____
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Permanently in a state on non division
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The cell cycle control system ____
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All of the choices are correct
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Which of the following is most like the cell cycle control system?
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The control device of an automatic washing machine
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You are asked to culture an unidentifed sample of animal tissue. You notice that the cells seem not to exhibit density-dependent inhibition. Which of the following choices would be the most likely source for this tissue example?
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A cancer
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A benign tumor differs from a malignant tumor in that a benign tumor _____
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Does not metasize
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You are the director of research for a drug company. A list of candidate drugs is brought to you. Which of the following shows the greatest promise as a cancer chemotherapy agent? A drug that _______
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Prevents sister chromatids from separating at anaphase
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Which of the following is NOT a function of mitosis? Mitosis helps organisms____
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All choices are correct
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2 chromosomes in a nucleus that carry loci for the same traits in the same positions on the chromosomes but specify different versions of some traits constitute a pair of _______
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Homologous chromosomes
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Which of the following is most like a pair of male human sex chromosomes?
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A bride and groom
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Which of the following statements is false?
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Gametes are made by mitosis
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Which of the following statements is FALSE?
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Mitosis produces daughter cells with half the number of chromosomes as the parent cell
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Which of the following does NOT enhance genetic diversity?
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Mitosis of somatic cells
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Independent orientation of chromosomes at metaphase I results in an increase in the number or____
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Possible combinations of characteristics
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Independent orientation or chromosomes at metaphase 1 and random fertilization are most like
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Shuffling cards and dealing our hands of poker
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Cancer is not usually inherited because _____
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The chromosomal changes in cancer are usually confined to somatic cells
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The genetic material is duplicated in _____
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The S phase
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Asexual reproduction requires _____ individual(s)
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1
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Which of the following people conducted experiments that demonstrated that DNA is the genetic material is bacteriophages
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Hershey and chase
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The sex chromosome complements of both normal human and normal mendalien males is ____
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XY
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When a T2 bacteriophage infects ah E.coli cell, what part of the phage enters the bacterial cytoplasm?
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Only the DNA
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The way that genetic material of a bacteriophage enters a bacterium is most like the way that ___
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A drug is injected with a hypodermic needle
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The monomers of DNA and RNA are______
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Nucleotides
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Which one of the following is FALSE?
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RNA uses the sugar dextrose
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Which one of the following is FALSE?
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DNA uses the nitrogenous base uracil
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Which of the following is false?
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The sequence of nucleotides along the length of a DNA strand is restricted by the base-pairing rules
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How would the shape of a DNA molecule change if adenine paired with guanine and cytosine paired with thymine? The DNA molecule would look _______
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Have irregular widths along its length
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The shape of a DNA molecule is most like ______
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A twisted rope ladder
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DNA replication ______
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Uses each strand of DNA molecule as a template for the creation of a new strand
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If one strand of DNA is CGGTAC, the corresponding strand would be _______
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GCCATG
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The copying mechanism of DNA is most like ______
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Using a photographic negative to make a positive image
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When one DNA molecule is copied to make 2 DNA molecules, the New DNA contains
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50% of the parent DNA
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Multiple origins of replication on the DNA molecules of eukaryotic cells serve to _______
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Shorten the time necessary for DNA replication
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Why does a DNA strand grow only in the 5′ to 3′ direction?
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Because DNA polymerase can only add nucleotides to the 3′ end of the molecule
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Which of the following enzymes catalyzes the linking together of RNA nucleotides to form RNA?
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RNA polymerase
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Which of the following occurs when RNA polymerase attaches to the promoter DNA?
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Initiation of a new RNA molecule
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Which of the following statements above ribosomes is false?
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The ribosomes of prokaryotes and eukaryotes are the same in structure and function
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Any change in the nucleotide sequence of DNA is called ______
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A mutation
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A physical or chemical agent that changes the nucleotide sequence of DNA is called ______
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A mutagen
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Consider the following sequence: “The dog did not eat” which of the following variations of this sentence is most like a reading frame mutation
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The dod idn ote at.
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Which of the following is always true with regard to a DNA double helix?
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Amount of adenine equals the amount of thymine and the amount of guanine is equal to the amount of cytosine
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What enzyme catalyzes the elongation of a new DNA strand?
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DNA polymerase
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What enzyme catalyzes the unwinding of DNA double helix?
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Helicase

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