Antibiotics are derived from all the following except
A. Penicillium.
B. Staphylococcus.
C. Streptomyces.
D. Bacillus.
E. Cephalosporium.
Answer: B
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A gram-negative, nonsporulating rod that is highly motile, oxidase negative, facultatively aerobic, ferments glucose, and urease-positive is likely to be of which genus?
A) Pseudomonas B) Proteus C) Lactobacillus D) Rickettsia
When Mendel crossed two plants that were heterozygous for a single trait, what was the phenotypic ratio of their offspring?
A. 1:2:1 B. 9:3:3:1 C. 3:1 D. 7:4 E. Varied depending on the trait
The recognition site for a restriction enzyme is 5? ACCGG^T 3?. The ^ symbol indicates the site of cleavage. After digestion of DNA with this restriction enzyme, how will the ends of the resulting DNA fragments look?
A) They will have sticky, single-stranded ends with 5? overhangs. B) They will have sticky, single-stranded ends with 3? overhangs. C) They will have blunt ends. D) They will have sticky, double-stranded ends. E) The result cannot be predicted using only the information given.
Which of these results would you predict to occur if climate change results in increased warming global temperatures?
A) Species competition will result in slower evolution in the tropics. B) The tree line (at which it is too cold for trees to grow) moves toward the north and south poles. C) Winters will be longer toward the poles. D) Land animals will suffer fewer consequences than marine animals.