The macromolecule composed of amino acids is a
A. carbohydrate.
B. steroid.
C. lipid.
D. protein.
E. nucleic acid.
Answer: D
Biology & Microbiology
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The protein that represses the lytic genes of bacteriophage ? is:
A. Cro. B. N. C. LexA. D. cI.
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Nucleotides contain what kind of sugars?
a. three?carbon b. four?carbon c. five?carbon d. six?carbon e. seven?carbon
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Aristotle’s ideas on the natural world were
most consistent with
a. evolution. b. biogeography. c. comparative morphology. d. creationism. e. geology
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Which structure regulates the movement of food into the stomach, and which regulates the passage of food into the small intestine?
a. pyloric sphincter; anal sphincter b. gastroesophageal sphincter; pyloric sphincter c. epiglottis; pyloric sphincter d. epiglottis; gastroesophageal sphincter
Biology & Microbiology