The molecule in the accompanying figure is glyceraldehyde, an example of a ____ sugar
a. triose
b. hexose
c. pentose
d. heptose
e. tetrose
ANSWER: a
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Attenuation occurs in a laboratory, because
A) nonvirulent or weakly virulent mutants grow faster in vitro in laboratory media. B) pathogens lose virulence with age. C) patients are generally treated with drugs that induce attenuation. D) None of the answers are correct.
What is the main advantage of the settling-point model of body-weight regulation over then body-fat set-point model?
What will be an ideal response?
New bacterial characteristics are being produced by splicing strands of
A. mRNA. B. carbohydrates. C. tRNA. D. DNA.
Which of the following best describes the definition of a gene?
A. the protein product that genetic material produces B. genetic information that produces a product, either proteins or RNA C. a section of DNA that produces a single protein product D. a collection of polypeptides that fold to form a complex protein