Amino acids always include the following functional groups EXCEPT
A) an alpha carbon.
B) a hydrogen.
C) an amino group.
D) a hydroxyl group.
Ans: D) a hydroxyl group.
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In transcription, the promoter is
A) an enzyme that binds DNA. B) a series of proteins that collectively bind to DNA. C) a recognition sequence in RNA that attracts ribosomes. D) A DNA sequence that RNA polymerase binds.
Which sex will undergo X chromosome inactivation? a. None of these choices
b. Females c. Neither d. Males e. Both
Ecology is:
a. a type of life style. b. the study of the interaction of organisms and their environment. c. a place where organisms live. d. what happens when a predator consumes a prey item. e. the study of the physical environment in an ecosystem.
True-breeding red flowers are crossed with true-breeding white flowers, and all of the offspring are pink. What kind of inheritance is this?
a. codominance b. polyploidy c. incomplete dominance d. homozygous recessive