Messenger RNA molecules contain information that is used to synthesize ________.

A. amino acids
B. polypeptides
C. nucleotides
D. fatty acids


Answer: B

Biology & Microbiology

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________ are cyclic nitrogenous bases with two rings and pronounced aromatic properties.

A. Fatty acids B. Quinones C. Purines D. Amino acids

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Which of the following is not true about anoxygenic photosynthesis?

A. Does not produce oxygen and often produces sulfur granules B. Does not produce oxygen C. Water is the usual source of electrons for photosynthesis D. Often produces sulfur granules

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Placoid scales are found on:

a. lungfish. b. sharks. c. ray-finned fish. d. lob-finned. e. snakes.

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The stomatal opening and closing are under the control of ____

a. ethylene b. cytokinins c. auxins d. abscisic acid e. gibberellins

Biology & Microbiology