Which of the following best describes how chromosomes move toward the poles of the spindle during mitosis?

A) The chromosomes are "reeled in" by the contraction of spindle microtubules.
B) Motor proteins of the kinetochores move the chromosomes along the spindle microtubules.
C) Nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles.
D) The chromosomes are "reeled in" by the contraction of spindle microtubules, and motor proteins of the kinetochores move the chromosomes along the spindle microtubules.
E) The chromosomes are "reeled in" by the contraction of spindle microtubules, motor proteins of the kinetochores move the chromosomes along the spindle microtubules, and nonkinetochore spindle fibers serve to push chromosomes in the direction of the poles


Ans: D) The chromosomes are "reeled in" by the contraction of spindle microtubules, and motor proteins of the kinetochores move the chromosomes along the spindle microtubules.

Biology & Microbiology

You might also like to view...

Which chamber of the heart will initially receive the oxygen poor blood from the body? a. Right ventricle b. None of these choices

c. Left atrium d. Right atrium e. Left ventricle

Biology & Microbiology

Yaws, Pinta, and Bejel are all diseases that

A. are respiratory tract infections. B. are slow, progressive skin diseases that can spread to deep tissues. C. are caused by Vibrio species. D. are caused by arthropod vectors. E. are sexually transmitted.

Biology & Microbiology

In addition to burning fossil fuels, humans return CO2 to the atmosphere faster than it can be removed by:

A. clearing forests for agriculture. B. polluting the oceans. C. generating nutrient pollution. D. expanding rice production. E. expanding beef production.

Biology & Microbiology

What hormone is most involved in labor?

a. estrogen b. prolactin c. oxytocin d. prostaglandin e. progesterone

Biology & Microbiology