The manufacturers of dietary supplements are known for making misleading claims that are often unsupported by science and medicine. Based on what you know about cell respiration and ATP, which of these claims about a supplement is plausible and potentially beneficial?
a. Doubles the free energy released from carbohydrates!
b. Stabilizes ATP molecules for long-lasting metabolic energy!
c. Reduces the energy needed to regenerate ATP molecules!
d. Stops oxidation inside energy-producing mitochondria!
c. Reduces the energy needed to regenerate ATP molecules!
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The homeotic gene KN-1 is expressed in the _______.
A. Phloem B. Schlerenchyma C. Apical meristems D. Sieve-tube elements E. Xylem
You are a chemist designing a test to allow women to know when they have ovulated. Choose the best hormone for your test, which will indicate that ovulation has occurred when detected at high levels.
A. progesterone B. LH C. chorionic gonadotropin D. estradiol
Which of the following molecules is incorrectly matched with its function?
a. T cell ? cell-mediated immunity b. neutrophil ? phagocytosis c. B cell ? antibody-mediated immunity d. basophil ? allergy e. T cell ? antibody-mediated immunity
The two major forces contributing to allopatric speciation are:a
mutation and natural selection. b. natural selection and migration. c. nonrandom mating and migration. d. natural selection and genetic drift. e. genetic drift and mutation.