Enzymes that catalyze removal of carbon dioxide from a substrate are called
A. ligases.
B. phosphotransferases.
C. decarboxylases.
D. aminotransferases.
E. oxidoreductases.
Answer: C
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In order for the theory of common descent and the theory of natural selection to both be supported, what can we infer about the genetic material for all life?
A) It must change very rarely. B) It must vary spontaneously and randomly. C) It must be transferable between adults. D) It must be transferable between different species.
One adaptation that enables an animal to live successfully on dry land is
A) moist skin used for gas exchange. B) development in a shelled egg. C) a two-chambered heart. D) external fertilization. E) gills.
Neurons that carry messages within the CNS are
a. sensory. b. motor. c. interneurons. d. autonomic.
Your physician has requested a test that involves radioactive iodine. This material will be injected and monitored to watch for normal rates of uptake. Test results reveal that the rate of uptake is abnormal. Which hormone would you predict to be outside of a homeostatic range?
A. Cortisol B. Growth hormone C. Atrial natriuretic peptide D. Thyroid hormone E. Insulin