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