In a DNA molecule, the phosphate serves ________
A) as a code
B) to hold the molecular backbone together
C) as nucleotides
D) to bind the sugars to their bases
B
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When a second EPSP (excitatory postsynaptic potential) arrives at a single synapse before the effects of the first have disappeared, what occurs?
A) spatial summation B) temporal summation C) inhibition of the impulse D) hyperpolarization E) decrease in speed of impulse transmission
Mollusks with shells have a or an __________________ muscle that allows the shell to open and close
Fill in the blank(s) with correct word
Which statement regarding control of pancreatic secretion is correct?
a. gastrin stimulates release of neutralization solution. b. CCK stimulates release of enzymes. c. secretin stimulates release of bicarbonate. d. both (a) and (b) above. e. both (b) and (c) above.
Which of the following is NOT one of the four major processes of respiration?
A) pulmonary ventilation B) gas transport C) oxygen-hemoglobin dissociation curve D) pulmonary gas exchange