Bacterial RNA polymerase binds to the ________
A) operator
B) proto-oncogene
C) regulatory gene
D) promoter
D
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Organisms that grow near deep-sea volcanic vents are likely to be
A. picrophilic. B. alkylophilic. C. barophilic or barotolerant. D. acidophilic.
Gray seed color in peas is dominant to white. Assume that Mendel conducted a series of experiments where plants with gray seeds were crossed among themselves, and the following progeny were produced: 302 gray and 98 white
(a) What is the most probable genotype of each parent? (b) Based on your answer in (a) above, what genotypic and phenotypic ratios are expected in these progeny? (Assume the following symbols: G = gray and g = white.) A) (a) GG × gg; (b) genotypic = 3:1, phenotypic = 1:2:1 B) (a) Gg × Gg; (b) genotypic = 1:2:1, phenotypic = 3:1 C) (a) GG × Gg; (b) genotypic = 1:2:1, phenotypic = 2:1 D) (a) gg × Gg; (b) genotypic = 1:2, phenotypic = 3:1 E) (a) Gg × Gg; (b) genotypic = 3:1, phenotypic = 9:3:3:1
DNA replication always proceeds by adding new bases to the ________ end of an existing strand.
A. 2' B. 3' C. 4' D. 5' E. 1'
Part of the reason for the charge difference inside and outside a neuron's membrane is:
A) positively charged proteins outside the membrane. B) positively charged proteins inside the membrane. C) excess potassium outside the membrane. D) excess sodium inside the membrane. E) negatively charged proteins inside the membrane.