At the end of the citric acid cycle, most of the energy remaining from the original glucose is stored in

A) CO2.
B) pyruvate.
C) ATP.
D) NADH.


Answer: D

Biology & Microbiology

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Prions contain

A. DNA only. B. protein only. C. RNA only. D. DNA, RNA, and protein.

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__________ fights infection by increasing the metabolic rate.

Fill in the blank(s) with the appropriate word(s).

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What is the best description of double fertilization in angiosperms?

A. One pollen grain fertilizes the embryo sac; the other sperm fertilizes the pollen grain. B. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the seed coat. C. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the polar nuclei, which forms the endosperm. D. One sperm fertilizes the egg, which develops into the embryo; the other sperm fertilizes the ovary, which becomes the fruit. E. One sperm fertilizes the egg, which develops into the embryo; the other sperm produces the pollen tube.

Biology & Microbiology

To be a successful cell evolutionarily, the earliest cells had to:

A) consume oxygen. B) reproduce. C) have mitochondria. D) photosynthesize.

Biology & Microbiology