Antiparallel means that
A) the two polynucleotide chains run in opposite directions.
B) each DNA molecule consists of one old and one new strand.
C) opposite strands are held together by base pairing.
D) the helix twists to the right.
E) there is complementary base-pairing.
A
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The Plasmodium parasite is transmitted by:
a. tainted food. b. sneezing. c. wind. d. mosquitoes.
A metabolic pathway must provide the desired chemical (metabolite) at the rate required for cellular and tissue function. To accomplish this, the reaction sequence ________.
a) includes only reactions are essentially irreversible b) includes only chemical reactions that are energetically favorable under the conditions for which synthesis is required c) all of the choices are correct d) "couples" energetically unfavorable reactions to ATP hydrolysis in order to drive the reaction toward the required product
Which of the following do yeast produce during fermentation?
A. NADH B. lactate C. pyruvate D. glucose E. ethanol
Pathogenicity The organisms of botulism, tetanus, and diphtheria are distinguished by their
A. Production of spores B. Chemotaxis C. Ability to produce coagulase D. Growth in anaerobic environments E. Production of exotoxins