In RNA molecules, adenine is complementary to

A.) cytosine.
B.) guanine.
C.) thymine.
D.) uracil.


Ans: D.) uracil.

Biology & Microbiology

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If damaged DNA is detected and cannot be repaired, which protein can trigger apoptosis?

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Which of the following elements is not particularly abundant in living cells?

a. carbon b. hydrogen c. helium d. nitrogen e. oxygen

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Which of the following statements is NOT true?

a. All chordates have a notochord. b. All chordates have pharyngeal pouches or gill slits. c. All chordates have a dorsal nerve cord. d. All chordates are vertebrates. e. Chordates are deuterostomes.

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Scanning tunneling electron microscopes create a three-dimensional image of specimens at atomic level resolution.

Answer the following statement true (T) or false (F)

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