Four of the five structures listed below assist in
chromosome movement. Select the exception.
a. centromere
b. spindle microtubules
c. kinetochores
d. centriole
e. nuclear envelope
Answer: e
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A mutant strain of yeast possesses a mutation in the nda2 gene, resulting in no production of ?1 tubulin. As a result, these cells would most likely
A) not duplicate their chromosomes. B) not enter M phase. C) not enter S phase. D) keep the nuclear membrane intact. E) have little or no spindle formation.
Name two factors that will influence the composition of aquatic communities
What will be an ideal response?
Which cloning vector should be used to express a 500-kb DNA fragment in Saccharomyces cerevisiae?
A. BAC B. ?1059 C. YAC D. pUC19
Which of the following statements about Neisseria gonorrhoeae is FALSE?
A) It causes disease in humans only. B) The gonococci stick to epithelial cells via fimbriae and capsules. C) The gonococci secrete a protease that destroys secretory IgA. D) The gonococci induce lasting immunity. E) Infected women are often asymptomatic.