The oncogene that causes Burkitt's lymphoma results from:
A. A translocation that moves a proto-oncogene next to an antibody gene
B. An inversion that places a proto-oncogene next to a transcription factor gene
C. A point mutation in a proto-oncogene
D. A virus that inserts next to a proto-oncogene
E. A deletion of an anti-oncogene
Ans: A. A translocation that moves a proto-oncogene next to an antibody gene
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Enumerating cells in a biofilm is especially challenging for
A) microscopic direct counting. B) measuring turbidity. C) viability counts with spread plating. D) microscopic direct county, measuring turbidity, and viability counts with spread plating.
Evolution is driven by
A) random mutation. B) novel metabolic pathways. C) selection pressure. D) selection pressure applied to random mutation.
If ATP production was regulated by positive feedback, then high levels of ATP in muscle cells would:
A. stimulate more ATP production. B. inhibit more ATP production. C. not alter ATP production. D. stimulate ATP degradation. E. All of the answers for this question are correct.
Genetic studies of an animal show that eye color is controlled by an autosomal gene with the dominant
allele (R) for red eye color and the recessive allele (r) for yellow eye color. A second autosomal gene has the dominant allele (T) leading to paws with thumbs while the recessive allele (t) codes for paws without thumbs. The genetic cross RRTT ? rrtt creates offspring with genotype RrTt. One of those dihybrids is mated in a testcross (RrTt ? rrtt). If the two genes are completely linked (no recombination occurs between them), then the testcross should produce offspring with the phenotype ratio
a. 3 red-eyed with thumbs: 1 yellow-eyed without thumbs. b. 1 red-eyed with thumbs: 1 yellow-eyed with thumbs: 1 red-eyed without thumbs: 1 yellow-eyed without thumbs. c. 1 red-eyed with thumbs: 1 yellow-eyed without thumbs. d. 9 red-eyed with thumbs: 3 yellow-eyed with thumbs: 3 red-eyed without thumbs: 1 yellow-eyed without thumbs. e. 1 yellow-eyed with thumbs: 1 red-eyed without thumbs.