Important components of coenzymes are ________.
A. ribozymes
B. substrates
C. metallic ions
D. vitamins
E. active sites
Answer: D
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Meiosis is a process that produces
A. All of the answer choices are correct. B. sperm cells. C. haploid cells. D. egg cells. E. gametes.
Why are most infants with phenylketonuria usually healthy at birth?
a. The defect causing the condition has usually been repaired by that time. b. The mother breaks down phenylalanine for both herself and her fetus. c. The infant can produce sufficient quantities of the enzymes needed by birth. d. Phenylalanine can be completely excreted in infants. e. Phenylalanine is completely metabolized in infants
Desiccation, a time-honored method of preserving food, is effective because the
A) heat of the process kills microbes. B) freezing step of the process kills microbes. C) salt concentration is too low to support metabolic function. D) UV light used in the process of sun drying penetrates effectively. E) water content is too low to support metabolic function.
The thick filament is composed almost entirely of ________ molecules.
A. myosin B. thrombin C. troponin D. tropomyosin E. actin