During the cell cycle, cells undergo changes that result in identical daughter cells. Which of the following steps occurs first?

A) Chromosomes line up along the middle of the cell.
B) Spindle fibers attach to chromosomes.
C) DNA is replicated.
D) Chromosomes condense.


Ans: C) DNA is replicated.

Biology & Microbiology

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In the diagram above, the mantle is labeled

a. oceanic crust b. continental crust c. 3 d. 2 e. 1

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In microbiology, sensitivity testing determines:

A. which antibiotic will treat a protozoan infection. B. which antibiotic will effectively treat a bacterial infection C. which antibiotic will treat a viral infection.

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In the respiratory electron transport chain electrons are passed from ________.

A) NADH and QH2 to O2 B) O2 to NAD+ and Q C) O2 to NADH D) ATP to O2

Biology & Microbiology