Choose the pair of terms that complete this sentence about functional groups in organic chemistry: Carboxyl is to ______ as ______ is to base.
A. acid...carbonyl
B. sulfhydryl...carbonyl
C. acid...amino
D. hydroxyl...amino
E. ketone...phosphate
Ans: C. acid...amino
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Which of the following is an example of neoteny?
A. relatively little body hair on adult humans B. bipedal locomotion of adult humans C. dying your hair blond D. graying hair as you age E. opposable thumbs
A pigment absorbs a photon if the energy of
the photon is a. exactly enough to boost an electron of the pigment to a higher energy level. b. slightly more than the energy of the electron absorbing the photon. c. significantly more than the energy of the electron absorbing the photon. d. exactly twice the energy of the electron absorbing the photon. e. any of these, depending on the type of pigment.
The final step of the citric acid cycle regenerates ____.
A. pyruvate B. acetyl-CoA C. fructose bisphosphate D. oxaloacetate E. citrate
If a population of 5,000 zebras is growing logistically and has a carrying capacity of 10,000, what would the per capita rate of increase be if the population grew by 50 zebras in 1 year?
A) 0.2 B) 0.1 C) 0.02 D) 0.01