N-acetylglucosamine is a repeating disaccharide found in the extracellular matrix.
a. true
b. false
Ans: a. true
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X-ray crystallography was used to determine the structure of:
A. cholesterol. B. vitamin B12. C. myoglobin. D. insulin. E. All of these choices are correct.
Early development in Drosophila includes nuclear division, but not cell division. This gives rise to a single cell with many nuclei
A. true B. false
How does aspirin help reduce blood clotting?
1.It reduces the red blood count. 2.It reduces platelet aggregation. 3.It reduces the platelet count. 4.It binds to fibrin. 5.It inhibits thrombin.
Given a population that contains genetic variation, what is the correct sequence of the following events, under the influence of natural selection?
1. well-adapted individuals leave more offspring than do poorly adapted individuals 2. a change occurs in the environment 3. genetic frequencies within the population change 4. poorly adapted individuals have decreased survivorship a. 2, 4, 1, 3 b. 4, 2, 1, 3 c. 4, 1, 2, 3 d. 4, 2, 3, 1 e. 2, 4, 3, 1