Which of the following enzymes does NOT digest
proteins?
a. trypsin
b. chymotrypsin
c. aminopeptidase
d. pepsin
e. lipase
Answer: e
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Refer to Figure 18-3. The average weight of a female guppy in the experimental group was:a
70 g.
b. 80 mg.
c. 170 mg.
d. 180 g.
e. 190 mg.
Explain the significance of what Loewi observed in his experiment with the two frog hearts.
A. It suggests that all vertebrate hearts receive both inhibitory and excitatory signals from different nerves. B. It showed that nerves have a direct electrical effect on heart muscle. C. It showed that neurons communicate with muscle by electrical signals. D. It suggests that a chemical substance released from the first heart, when added to the second heart, reproduced the effects of electrical stimulation.
Using the ABCD rule for diagnosing a melanoma associated with the skin, the "D" refers to
A) darkness of the spot or region of the skin, usually varying in intensity of the color black. B) degree of irregularity of the spot from a circle. C) diameter of the spot. D) density or thickness of the melanoma. E) "damage," or the extent that the skin cells have lost normal function.
After glycolysis, pyruvate is oxidized to one CO2 and the two-carbon molecule acetyl-CoA by a multienzyme system called the ________ ________ complex.
What will be an ideal response?