Which of the following processes describes the formation of a complementary RNA molecule?
A) replication B) mosaicism C) mutation D) transcription E) translation
Answer: D
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Your kidneys filter your blood about _____ times per day and reabsorb _____% of the water entering the renal tubules, _____% of the electrolytes in the blood, and _____% of the glucose and amino acids that were filtered out of the blood in the glomerulus
A. 60; 99.9; 99.9; 100 B. 100; 50; 50; 99 C. 75; 100; 60; 90 D. 40; 99.9; 100; 75 E. 10; 80; 25; 70
What enzyme is responsible for proofreading activities during DNA replication?
a. DNA polymerase b. RNA polymerase c. primase d. telomerase
If a cell has a greater concentration of solute than its environment, the cell
A. is isotonic to the environment. B. will not experience a net gain or loss of water. C. will die. D. is hypertonic to the environment. E. is hypotonic to the environment.
Potassium ion channels open ____, resulting in ____
a. as the action potential passes down the axon; a more negatively charged axon cytoplasm b. when the threshold potential is reached; the opening of more sodium channels c. during the resting potential; the diffusion of sodium ions into the axon cytoplasm d. when the action potential reaches the axon terminal; a more positively charged axon cytoplasm e. when neurotransmitters attach to dendrite receptors; no difference in the charge of the axon cytoplasm