Four of the five actions listed below are true of
testosterone. Select the exception.
a. promotes secondary sex characteristics
b. influences sexual behavior
c. necessary for growth and function of male
reproductive tract
d. stimulates spermatogenesis
e. produced by spermatogonia cells
Answer: e
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Both prokaryotic and eukaryotic cells use ________ to turn certain genes on or off.
Which of the following is not true of signal integration by more than one transcription factor?
A. It occurs in both bacteria and eukaryotes. B. It allows for multiple environmental signals to control the expression of a single gene. C. It is used to control the expression of genes in opposite orientations that are controlled by the same promoter. D. It can include the use of both repressors and activators at the same promoter.
What must occur before a glucose molecule can be broken down to release energy?
a. One ATP molecule must phosphorylate the six carbon sugar. b. Two ATP molecules must phosphorylate the six carbon sugar. c. Three ATP molecules must phosphorylate the six carbon sugar. d. One ATP molecule must be taken away from glucose. e. Two ATP molecules must be taken away from glucose.
Which of the following substances is generally filtered from the blood by the kidneys?
a. water b. sodium c. urea d. glucose e. All of the listed responses are correct.