How many ATP are spent before a glucose molecule can be broken down to release energy?

a. one
b. two
c. three
d. four
e. six


ANSWER: b

Biology & Microbiology

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Classic experiments suggested that a floral stimulus, florigen, could move across a graft from an induced plant to a noninduced plant and trigger flowering

Recent evidence using Arabidopsis has recently shown that florigen is probably _____. A) a phytochrome molecule that is activated by red light B) a protein that is synthesized in leaves, travels to the shoot apical meristems, and initiates flowering C) a membrane signal that travels through the symplast from leaves to buds D) a second messenger that induces Ca++ ions to change membrane potential E) a transcription factor that controls the activation of florigen-specific genes

Biology & Microbiology

The first antibiotic to be characterized was a

A) cephalosporin. B) quinolone. C) ?-lactam. D) macrolide.

Biology & Microbiology

Which of the following statements concerning cancer and mutations is correct?

A. Cancer can only occur with a mutation in a somatic cell. B. Cancer can only occur with a mutation in a germ cell. C. Usually multiple mutations are required in different genes to cause cancer. D. Usually a single mutation is all that is required to cause cancer. E. None of the answer options is correct.

Biology & Microbiology

The study of the distribution of animals and plants around the world is

a. diversity. b. biogeography. c. ecology. d. natural history. e. environmentalism.

Biology & Microbiology