Diphtheria exotoxin is made only by strains of Corynebacterium diphtheriae that carry a prophage containing the tox gene.
Answer the following statement true (T) or false (F)
True
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Which of the following is not a correct pairing?
A. FGF: bone formation B. histamine: swelling around a wound C. NGF: survival of nerve cells D. histamine: blood vessel dilation E. All of the answer options are correct.
HREs are
A) hormone receptors. B) DNA sequences in promoter regions to which steroid hormone receptors bind. C) proteins that interact with histones. D) elements that lead to histone deacetylation. E) None of these
Suppose the pigmentation of a Labrador retriever's fur is subject to epistasis of the B alleles by the e alleles. B (black) is dominant over b (chocolate brown). E is dominant over e. Homozygous e is epistatic to the black and chocolate genes. Given this information, what genotype would give a yellow (or "golden") retriever?
a. BBEe b. BBee c. BbEe d. bbEE
A bacterial gene regulatory system is likely to have (check all that apply)
A. a motor. B. a coding sequence. C. an operator. D. a ribosome recognition site. E. one or more introns.