23) Where do the microtubules of the cells? A) centromere B) centrosome C) centr

Question

23) Where do the microtubules of the cells? A) centromere B) centrosome C) centriole D) chromatid E) kinetochore e spindle originate during mitosis in both plant and animal originate 24) Taxol is an anticancer drug extracted from the Pacific yew tree . In animal cells, Taxol ation by binding to microtubules and accelerating their assembly from in. Surprisingly, this stops mitosis. Specifically. Taxol must affect the formation of the mitotic spindle. B) anaphase. C) formation of the centrioles. D) chromatid assembly E) the S phase of the cell cycle. 25) During which phase of mitosis do the chromatids become chromosomes? A) telophase B) anaphase C) prophase D) metaphase E) cytokinesis 26) What is a cleavage furrow? A) a ring of vesicles forming a cell plate B) the separation of divided prokaryotes C) a groove in the plasma membrane between daughter nuclei D) the metaphase plate where chromosomes attach to the spindle E) the space that is created between two chromatids during anaphase 27) Which of the following is true concerning cancer cells? A) They do not exhibit density-dependent inhibition when growing in culture B) When they stop dividing, they do so at random points in the cell cycle. C) They are not subject to cell cycle controls. D) When they stop dividing, they do so at random points in the cell cycle, and they are subject to cell cycle controls. E) When they stop dividing, they do so at random points in the cell cycle: they are no cell cycle controls; and they do not exhibit density-dependent inhibition when growir culture

Explanation / Answer

23) The correct option is B. Centrosome.

The centrosome is an organelle where cell microtubules are organized. It regulates the cell division cycle.

24) The correct option is A. the formation of the mitotic spindle.

Taxol affects the fibers of the mitotic spindle.

25) The correct option is B. anaphase.

Chromatids separate to become chromosomes at stage of anaphase of mitosis.

26) The correct option is C. a groove in the plasma membrane between daughter nuclei.

During Cytokinesis, a cleavage furrow is formed in the plasma membrane, which separates the dividing cell into two cells.

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