Which of the following eukaryotic DNA polymerases replicates mitochondrial DNA?
A) alpha
B) beta
C) delta
D) epsilon
E) gamma
E) gamma
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Which of the following is not true of the lacO region of the lac operon?
A. It is the operator of the operon. B. It produces a diffusible product that can regulate the expression of the operon. C. It is bound by the Lac repressor when lactose is unavailable. D. Its mutation leads to constitutive expression of the operon.
Carbon dioxide has what effect on systemic arterioles?
A) vasoconstriction B) vasodilation C) neither vasodilation or vasoconstriction, but may cause vasospasm D) vasoconstriction and vasospasm E) vasospasm
Which trophic level would contain the lowest quantity of energy (kcal per m2)?
a. secondary consumers b. tertiary consumers c. herbivores d. producers e. primary consumers
Oncogenic viruses
A) cause acute infections. B) are genetically unstable. C) cause tumors to develop. D) are lytic viruses that kill the host cell. E) have no effect on the host cell.