The DNA fragments generated by some restriction enzymes ____
a. have fused ends
b. have RNA ends
c. have sticky ends
d. form a circle
e. cannot be used to make recombinant DNA
ANSWER: c
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In the accompanying figure, which combination of letters accurately represents two homologous chromosomes?
a. A and B b. A and C c. A and D d. B and F e. D and E
Mild effects of cyanide exposure:
A) include slow, shallow respirations and generally require positive-pressure ventilatory assistance. B) can only be reversed with high doses of amyl nitrate and high-flow oxygen via nonrebreathing mask. C) include hemoptysis and hematemesis, and mandate immediate treatment with hyperbaric oxygen. D) generally resolve by simply removing the victim from the environment and administering oxygen.
Bacteria that grow in mine drainage at pH 1-2 are probably which of the following?
A. alkaliphiles B. acidophiles C. neutrophiles D. obligate anaerobes
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