Which is NOT a correct association?
A) S stage-DNA synthesis
B) M stage-mitosis and cytokinesis
C) interphase-shortest stage of the cell cycle
D) G1 stage-cell grows in size and cell organelles increase in number
E) G2 stage-metabolic preparation for mitosis
Ans: C) interphase-shortest stage of the cell cycle
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You extract DNA from an E. coli cell and observe it is hemi-methylated. Which strand of DNA is older?
A. The methylated strand B. The strand that is not methylated C. Neither—they are the same "age."
Pertussis (whooping cough) is an epidemic disease that is a highly contagious, acute infection of the upper respiratory tract caused by the:
a. Brucella spp. b. Bordetella spp. c. Pasteurella spp. d. Francisella spp.
Which does NOT occur in prophase I of meiosis?
a. cytokinesis b. formation of groups of four chromatids c. homologue pairing d. crossing over e. condensation of chromatin
Which of the following organisms is a prokaryote?
A. algae B. archaea C. fungus D. protozoa E. both archaea and protozoa