Cold viruses are transmitted by ________.
A. droplet contact
B. direct contact
C. indirect contact
D. All of the choices are correct.
Answer: D
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Diploid organisms
a. have corresponding alleles on homologous chromosomes. b. are usually the result of the fusion of two haploid gametes. c. have two sets of chromosomes. d. have pairs of homologous chromosomes. e. have all of these qualities.
Which of the following hormones is produced only when a woman is pregnant?
a. testosterone b. gonadotropic-releasing hormone c. human chorionic gonadotropin d. estrogen e. progesterone
Which of the following statements about taste is false?
a. Taste receptors activate second messengers in the signal transduction process. b. Genetics play a role in determining what a person tastes. c. Taste receptors only detect chemicals that have been dissolved in saliva. d. Smell affects flavor because odors pass from the mouth to the nasal cavity. e. If taste receptors are damaged, they are incapable of regeneration
In terms of transcription regulation, the role of a helix-turn-helix is most similar to that of a(n) .
A. zinc finger B. poly-A tail C. guanine cap D. sigma factor