Which of the following inhibits bacterial growth but does not kill bacteria?
A. Antiseptic agent
B. Lysozyme
C. Bacteriostatic agent
D. Bactericidal agent
Answer: C
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Which of the following can be examined with an ordinary bright-field microscope?
A. Chemical-fixed specimens B. Wet mounts C. Heat-fixed specimens D. All of the choices are correct.
Coupled reactions are reactions in which an
A. exergonic reaction drives a spontaneous reaction. B. exergonic or endergonic reaction provides products not used for other reactions. C. exergonic reaction drives an endergonic reaction. D. endergonic reaction drives a spontaneous reaction. E. endergonic reaction drives an exergonic reaction.
In pea plants, a gene R produces red flowers and is dominant to a gene r, which produces white flowers. A gene T produces tall plants and is dominant to a gene t for short plants. If a plant that is homozygous for red flowers and heterozygous for tallness is crossed with a plant that is short and white, what will be the phenotypic ratio of the offspring?
A. one tall red:one short red B. nine tall red:three short red:three tall white:one short white C. three tall red:one short red:one tall white D. one short white:two short red:one tall white
Portion of Figure 21.11
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Refer to the accompanying figure for questions 26-28.
Which letter points to the stipe?
A. A B. B C. C D. D E. E