A promoter is a regulatory region located at the ____
a. beginning of a gene
b. end of a gene
c. beginning of a chromosome
d. centromere of a chromosome
e. end of a chromosome
a
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When leaves are actively transpiring at a high rate:
A. the risk of vessel collapse is reduced because the leaves exert a great deal of tensile force. B. the chance that an air bubble will form is decreased. C. the force created pulls vessel walls inward. D. air will only leak into a vessel if that vessel is broken or damaged. E. the chance of vessel collapse is reduced due to the high volume of water transport.
The part of the brain that includes the thalamus, hypothalamus, and pineal gland is the
a. pons. b. medulla oblongata. c. dorpora quadrigemina. d. diencephalon. e. telencephalon.
Polypeptides are composed of many
A. amino acids. B. carbohydrates. C. nucleic acids. D. fatty acids.
In oxidation-reduction reactions, ____.
A. both molecules give up electrons B. both molecules gain electrons C. cells harvest energy D. the molecule that accepts electrons is reduced E. hydrogen ions are usually absorbed