Within the peptidoglycan layer, the crossbridges that connect the chains of alternating sugar molecules extend between _______ .
a) two N-acetylmuramic acid molecules
b) an N-acetylmuramic acid and an N-acetylglucosamine
c) two glucose molecules
d) two N-acetylglucosamine molecules
a) two N-acetylmuramic acid molecules
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Feedback inhibition, covalent modification, and allosteric regulation are all examples of ________.
A. compartmentalization B. regulation of gene expression C. metabolic channeling D. posttranslational regulation
In eukaryotes, photosynthesis takes place inside the ________.
A. chloroplasts B. mitochondria C. cytoplasm D. Golgi apparatus
The very young and the elderly are more susceptible to infectious disease
Indicate whether this statement is true or false.
Researchers began using short tandem repeats (STRs) because
A) shorter DNA molecules were more likely to persist in a violent situation. B) each person has no more than one copy of each STR. C) STRs are nonuniformly distributed. D) restrictive enzymes cannot be used to cut short DNA molecules.