Which of the following statements about NAD+ is true?
A) NAD+ is reduced to NADH during glycolysis, pyruvate oxidation, and the citric acid cycle.
B) NAD+ has more chemical energy than NADH.
C) NAD+ is oxidized by the action of hydrogenases.
D) NAD+ can donate electrons for use in oxidative phosphorylation.
E) In the absence of NAD+, glycolysis can still function.
Answer: A
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The science of grouping and classifying microorganisms is known as
A) microbial physiology. B) proteomics. C) metabolomics. D) microbial systematics.
Based on what you know about resistance to infection, why are some people resistant to HIV?
A) They have a strong immune system that clears the virus completely. B) They have been immunized in an experimental program. C) They can't be infected with HIV even when exposed. D) They never engage in risky behavior and thus can't become infected.
The Dunkers are a religious group that moved from Germany to Pennsylvania in the mid-1700s. They do not marry with members outside their own immediate community. Today, the Dunkers are genetically unique and differ in gene frequencies, at many loci, from
all other populations including those in their original homeland. Which of the following likely explains the genetic uniqueness of this population? A) population bottleneck and Hardy-Weinberg equilibrium B) heterozygote advantage and stabilizing selection C) sexual selection and inbreeding depression D) mutation and natural selection E) founder effect and genetic drift
A mutation in the DNA of C. elegans will automatically lead to the production of a
nonfunctioning protein.
a. True b. False