A drug that interferes with microtubule formation is likely to completely disrup

Question

A drug that interferes with microtubule formation is likely to completely disrupt cells. A) contraction of muscle cells B) the movements of sperm cells C) the function of lysosomes. D) the amoeboid motion of a cell. A basal body is A) composed of nine microtubule doublets surrounding a pair of microtubules. B) composed of nine microtubule triplets surrounding a central pair of microtubules. C) identical in structure to cilia. D) similar in structure to centrioles. During cell reproduction, chromatin fibers coil up into structures called A) lysosomes. B) nucleoli. C) ribosomes. D) chromosomes. Which of the following statements about internal membranes in eukaryotic cells is false? A) In eukaryotic cells, internal membranes standardize the internal environment of all cellular organelles B) In eukaryotic cells, internal membranes provide an additional area for many metabolic processes to occur. C) In eukaryotic cells, internal membranes greatly increase a cell's total membrane area. D) In eukaryotic cells, internal membranes form membranous compartments called organelles. Which of the following statements about cells is true? A) All cells are attached to other cells. B) All cells are motile C) All cells have internal structures that move. D) All cells have cell walls. Microfilaments differ from microtubules in that microfilaments A) are found only in plants, whereas microtubules are found in both plant and animal cells. B) help to anchor organelles, Whereas microtubules primarily function to help cells change shape and move. C) are mainly composed of actin, whereas microtubules are composed of tubulin. D) are thicker than microtubules. In the reaction A rightarrow B rightarrow C + heat, A) there is a net input of energy. B) the potential energy of the products is greater than that of the reactant. C) entropy has decreased. D) the potential energy of the products is less than that of the reactant. If placed in tap water, an animal cell will undergo lysis, whereas a plant cell will not. What accounts for this difference? A) the relative impermeability of the plant cell wall to water B) the expulsion of water by the plant cell's central vacuole C) the relative inelasticity and strength of the plant cell wall D) the fact that plant cells are isotonic to tap water oxygen crosses a plasma membrane by A) osmosis. B) passive transport. C) active transport. D) pinocytosis.

Explanation / Answer

21) THE MOVEMENT OF SPERM CELL.

22) STRUCTURE SIILAR TO CENTRIOLE.

23) CHROMOSOMES

24) (C)

25) ALL CELLS HAVE INTERNAL STRUCTURE THAT MOVE

26) MICROFILAMENTS ARE MAINLY COMPOSED OF ACTIN ,WHEREAS MICROTUBULES ARE COMPOSED OF TUBULIN.

27)

28) THE RELATIVE INELASTICITY AND STRENGTH OF THE PLANT CELL WALL

29) PASSIVE TRANSPORT

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