Deletions are most useful for gene mapping
A) when you have a mutant allele of a gene that is recessive to normal alleles and amorphic.
B) when you have a mutant allele of a gene that is dominant to wild-type alleles.
C) if you have a mutant allele of a gene that results in no detectable mutant phenotype when homozygous.
D) if you have a gain-of-function mutant allele of a gene.
A) when you have a mutant allele of a gene that is recessive to normal alleles and amorphic.
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Shigella and cholera toxin both
A. have an A-B arrangement. B. work through ADP ribosylation. C. increase cAMP levels. D. prevent protein synthesis.
Carbon monoxide ____
a. traps heat in the atmosphere b. is an atmospheric pollutant c. causes acid rain d. interferes with the nervous system e. binds to a hemoglobin molecule and interferes with oxygen uptake
A polysome is
a. one of the units of a ribosome. b. the nuclear organelle that synthesizes RNA. c. an organelle that functions similarly to a ribosome during meiosis. d. the two units of a ribosome considered together. e. an mRNA molecule with several ribosomes attached.
Based on the data in Table 18-1, which of the following primates has the most recent common ancestor with humans?
a. rhesus monkey b. gibbon c. tarsier d. gorilla e. orangutan