Which of the following are produced during the citric acid cycle?
A. oxygen
B. a proton gradient
C. ATP, NADH, and FADH2
D. ATP and NAD+
E. pyruvate, ATP and NADH
Answer: C
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Streptococcus pyogenes
A. is alpha-hemolytic. B. is gamma-hemolytic. C. is beta-hemolytic. D. may form endospores. E. is alpha-hemolytic AND may form endospores.
Like bacteria, yeasts grow easily in culture. But why are they regarded as more useful for recombinant DNA technology?
a. They are more stable in culture than prokaryotes because they are not prone to bacteriophages. b. They are virtually harmless to humans so they are less risky to work with than prokaryotes. c. Because yeasts are eukaryotic, they exhibit post-transcriptional mRNA editing not performed by any prokaryotes such as Escherichia coli. d. They have longer lifespans so they do not have to be split and recultured as often.
A regression analysis of two traits yields a slope of 0. Explain the biological meaning of this value
What will be an ideal response?
Consider the following sentence: "The dog did not eat." Which of the following variations of this sentence is most like a frameshift mutation?
A) The did dog not eat. B) The dod idn ote at. C) The did not eat. D) The dog did dog did not eat.