During which phase(s) of mitosis are chromosomes composed of two sister chromatids?

a. prophase and prometaphase only
b. prophase, prometaphase and metaphase
c. prophase, prometaphase, metaphase and anaphase
d. anaphase and telophase only
e. all phases of mitosis


ANSWER: b

Biology & Microbiology

You might also like to view...

Conjugation is a process by which the bacterial cells

a. contact each other using a sex pilus to obtain new alleles. b. contact each other for gratification purposes. c. disrupt each other d. are infected with virus e. a bacteriophage carries DNA from one bacterium to another.

Biology & Microbiology

All vertebrates have _____

a. an open circulatory system c. lungs b. a two-chambered heart d. none of these

Biology & Microbiology

Which of the following is not involved in the specific targeting of proteins to lysosomes?

a. N-linked glycosylation in the ER b. Mannose phosphorylation c. The mannose-6-phosphate receptor d. Signal patches

Biology & Microbiology

Of the sites listed below, which is most likely to be free of any normal microbiota?

A. nasopharynx B. uterus C. vagina D. large intestine

Biology & Microbiology