The results of the experiments of Avery and his colleagues indicate that
A. proteins are antigens.
B. proteins transfer genetic information.
C. capsule formation is mediated by RNA.
D. DNA is the transforming material.
E. DNA replication is semiconservative.
D
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Which type of test is particularly useful in analyzing tumors in tissues surrounded by bone?
A. PSA B. CAT scan C. Pap test D. MRI E. X-ray
Which of the following statements concerning the cell cycle is FALSE?
a. The activity of Cdks increases and decreases during the cell cycle. b. Cyclins fluctuate during the cell cycle. c. Cdks are active only when they bind to cyclins. d. The anaphase-promoting complex stimulates the separation of sister chromatids e. M-Cdk inhibits mitosis
A snake with stripes would be more likely to survive by fleeing predators in a straight line.
a. true b. false
When glucose is being used up and not replaced from food intake, the blood sugar level can be maintained by synthesizing glucose from smaller molecules such as pyruvate or lactate. This process is called gluconeogenesis
Which organ is principally responsible for supplying glucose to the rest of the body when glucose reserves are low? (a) liver (b) pancreas (c) spleen (d) gall bladder