The molecular fragment on an antigen molecule that a lymphocyte recognizes and responds to is called a/an

A. variable region.
B. antigen binding site.
C. epitope.
D. hapten.


Answer: C

Biology & Microbiology

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Transmembrane proteins must have:

A. a signal sequence. B. a signal-anchor sequence. C. a nuclear localization sequence. D. both a signal sequence and a signalanswer sequence.

Biology & Microbiology

A molecule comprised of a five-carbon sugar, a nitrogen-containing base, and a phosphate group is called:

a. a nucleic acid. b. a triglyceride. c. deoxyribonucleic acid. d. a polypeptide. e. a carbohydrate.

Biology & Microbiology

The structural building blocks for proteins are ____

a. enzymes b. amino acids c. cholesterol d. polysaccharides e. vitamins

Biology & Microbiology

The basic unit in ecology is the

A) ecosystem. B) gene. C) individual. D) species.

Biology & Microbiology