If you take into account the amount of ATP generated by ATP synthase per molecule of NADH and per molecule of FADH2 produced, and the number of ATP molecules produced by substrate-level phosphorylation, what is the predicted energy yield of the Krebs cycle, per molecule of glucose in eukaryotic cells?
A. 10 ATP
B. 20 ATP
C. 30 ATP
D. 2 ATP
E. 18 ATP
Answer: B
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Genetic recombination ____
a. occurs in eukaryotes but not prokaryotes b. involves exchange between non-homologous regions of DNA c. results from asexual reproduction
d. decreases genetic diversity e. can occur in the absence of meiosis
When the ring-necked pheasant was introduced from China to the United States, it increased in population, stabilized, and did not appear to cause any detrimental effects on the populations of any of the plants or animals in the regions in the Midwest where it lives. Therefore, it probably
a. filled a realized niche previously occupied by another bird. b. filled a fundamental niche previously not occupied. c. experienced extensive competitive exclusion. d. experienced density-dependent limiting factors. e. experienced extreme density-independent limiting factors.
Barringer Crater in Arizona was formed when
a 300,000-ton asteroid slammed into Earth 50,000 years ago. Which of the following is true about this event? a. It hit so early that it had little influence on the history of life. b. This one produced about 150 times the energy of the bomb that hit Hiroshima. c. Its impact produced a minor crater. d. Scientists recently disproved that an asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases only minor amounts of energy.
Which of the following statements is NOT true about
asteroids? a. They have had little influence on the history of life. b. They do not emit light and are difficult to see. c. Their impacts have produced craters visible in satellite images. d. One asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases an enormous quantity of energy.