bio test castle learning 2 – Flashcards
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which statement best descries the plasma membrane of a living plants cell?
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It selectively regulates the passage of substances into and out of the cell.
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Which statement could describe molecules A and B?
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Molecules A is a simple sugar, and molecule B is a starch
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Cell membranes are said to be selectively permeable. Which statement best explains what selectively permeable means?
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The cell membrane lets certain substances enter the cell and keeps certain substances out of the cell.
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Humans require organ systems to carry out life processes. Single-celled organisms do not have organ systems and yet they are able to carry out life processes. This is because
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organelles present in single celled organisms act in a manner similar to organ systems
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The process of osmosis would explain the net movement of water into a cell if the percentage of
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water was 90% inside the cell and 95% outside the cell
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Which statement best describes the cells in the diagram
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Both cell A and cell B use energy released from ATP.
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which cell structure contains information needed for protein synthesis
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1
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which suspension would contain red blood cells that would appear wrinkled and reduced in volume?
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B
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The ability of certain hormones to attach to a cell is primarily determined by the
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receptor molecules in the cell membrane
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An organelle that releases energy for metabolic activity in a nerve cell is the
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mitochondrion
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which structure allows the passage of this oxygen to the environment
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B- cell membrane
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Which statement best describes the organelles in a cell?
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Organelles must work together and their activities must be coordinated.
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Within which structure shown in the diagram below are energy-rich organic compounds used to produce ATP?
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1
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Which statement regarding the function of the cell membrane of all organisms is not correct?
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the cell membrane forms a barrier that keeps all substances that might harm the cell from entering the cell.
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The death of the plants was most likely due to
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water moving out of plant cells into the surrounding enivronment
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Which statement best explains the changes shown?
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molecules moved across the membrane without additional energy being supplied.
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which cell structure is correctly paired with its primary function?
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ribosome- protein sythesis
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the largest amount of DNA in a plant cell is contained in
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a nucleus
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which sequence represents the levels of biological organization from smallest to largest?
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organelle-cell-tissue-organ system- organism
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which cell structure is represented by the three-dimensional diagram?
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plasma membrane
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The diagram represents a white blood cell engulfing some bacteria. The stricture labeled X is most likely a
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vacuole
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the sequence can be completed correctly by inserting
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"cells-" between organelles and tissues
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which structures carry out life functions withing cells?
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organelles
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based on the distribution of these molecules, what would most likely happen after a period of time?
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the concentration of 02 will increase the cell
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what is the main function of a vacuole in a cell?
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storage
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in a multi cellular organism, organs carry out a variety of life functions. In a single-celled organism, these functions are performed by
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organelles
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single-celled organisms are able to maintain internal stability because they
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contain structures that perform life functions
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which letter indicates a cell structure that directly controls the movement of molecules into and out of the cell?
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B
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These groups of cells represent different
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tissues in which similar cells function together
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Which set of functions is directly controlled by the cell membrane?
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active transport, recognition of chemical messages, protection
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Label the location of each of the cell structures listed:
cell wall
cytoplasm
cell membrane
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cell wall: 2
cytoplasm:1
cell membrane: 3
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the change in appearance of the cell resulted from
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more water moving out of the cell that into the cell
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which cell structures are correctly paired with their functions?
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the ribosomes make proteins, and the nucleus stores genetic information
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While viewing a slide of rapidly moving sperm cells, a student concludes that these cells require a large amount of energy to maintain their activity. The organelles that most directly provide this energy are known as
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mitochondria
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which beaker correctly shows the expected locations of the molecules after a period of one hour?
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4
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what is the basic unit of structure and function in all living things
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cell
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which factor prevented the protein molecules from moving out of the cell?
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molecule size
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which sequence shows a decreasing level of complexity?
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organism-organs-tissues-cells
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certain poisons are toxic to organisms because they interfere with the function of enzymes in mitochondria. This results directly in the inability of the cell to
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release energy from nutrients
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In the cell show below, which lettered structure is responsible for the extraction of most cellular waste.
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B
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Which statement concerning ATP and activity within the cell is correct?
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ATP is produced most efficiently by structure C
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a pesticide that kills an insect by interfering with the production of proteins in the insect would most directly affect the activity of
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ribosomes
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in the human body, oxygen is absorbed by the lungs and nutrients are absorbed by he small intestine. In a single-celled organism, this absorption directly involves the
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cell membrane
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damage to which structure will most directly disrupt water balance within a single-celled organism?
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cell membrane
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a function of cell membranes in humans is the
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recognition of certain chemicals
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studies of fat cells and thyroid cells show that fat cells have fewer mitochondria that thyroid cells. A biologist would most likely infer that fat tissue
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requires less energy that thyroid tissue
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if the ribosomes of a cell were destroyed, what effect would this most likely have on the cells?
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the cell would be unable to synthesize proteins.
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a student observes that an organism is green. A valid conclusion that can be dawn from this observation is that
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not enough information is given to determine whether the organism is a plant or an animal
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Which statement is correct concerning the structure labeled a?
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it aids in the removal of metabolic wastes in both cell X and cell Y
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which row in the chart below best describes the active transport of molecule X through a cell membrane?
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3
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if frogs eggs taken from a freshwater pound are placed in a saltwater aquarium, what will most likely happen?
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water will leave the eggs
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which substance can enter a cell by diffusion without having to be digested?
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water
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which row in the chart below best explains the movement of some molecules between the model cell and the solution in the beaker?
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1 from high to low concentration without using cellular energy
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muscle cells in athletes often have more mitochondria than the muscle cells in non athletes. based on this observation it can be inferred that the muscle cells in athletes
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have a greater demand for energy that the muscle cells of nonathletes
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which process takes place in structure A?
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cellular respiration
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which structure in a stained cheek cell would most likely be visible when viewed through the high-power objective of a compound light microscope?
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nucleolus
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the function of a cell depends primarily on its
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structure
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which observation would most likely be made 24 hours later?
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the diameter of the model cell has increased
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the change in red blood cell volume is principally due movement of
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water
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homeostasis in unicellular organisms depends on the proper functioning of
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organelles