In transcription,
a. several proteins can made from the same
DNA molecule.
b. promoters are at the beginning of a gene.
c. messenger RNA is produced.
d. a specific enzyme called RNA polymerase
is required.
e. all of these are true.
E
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Since the hepatic portal vein empties into the liver, it is able to control the amount of _________ in the blood.
A. alcohol and drugs B. toxins, pesticides, and carcinogens C. glucose D. glucose, alcohol, and drugs E. glucose, alcohol, drugs, toxins, pesticides, and carcinogens
The structure of the spinal cord and the brain are different in that:a
the spinal cord has only white matter, but the brain has both white and gray matter. b. the spinal cord has gray matter outside, but the brain has gray matter inside. c. the spinal cord has white matter outside, but the brain has white matter inside. d. the spinal cord has both white and gray matter, but the brain has only gray matter. e. Actually, the location of the gray and white matter is the same in both.
Tumor suppressor genes function to
A) prevent gene expression of oncogenes. B) prevent release of growth factors. C) slow down unchecked cell growth, differentiation, division, or adhesion. D) produce proto-oncogenes. E) stimulate metastasis.
Which of the following is homozygous dominant?
a. AA b. aa c. Aa d. all of these