The ability to conjugate depends on the presence within the donor cell of a plasmid called the ____
a. X factor
b. F factor
c. C factor
d. sex pilus
e. S factor
B
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Refer to the paragraph on the effects of estrogens in the environment
You are assigned to write the report to the Environmental Protection Agency, which needs to decide what level of 17?-estradiol to permit in sewage output. You do not want to make the level any lower than necessary, because it requires substantial additional money for the extra treatment of sewage. Given the data presented above, what level of 17?-estradiol would you suggest is safe to prevent feminization of fish? A) 2.5 ng/l B) 5 ng/l C) 12.5 ng/l D) 25 ng/l E) 100 ng/l
The term
Indicate whether this statement is TRUE or FALSE.
Which of the following statements is false?
a. DNA is usually composed of two nucleotide strands. b. DNA contains deoxyribose. c. DNA does not normally contain uracil. d. The nucleotides of DNA are linked by phosphodiester linkages. e. DNA does not normally contain a phosphate group
Which one of the following bacteria does NOT belong with the others?
A) Bacillus B) Escherichia C) Lactobacillus D) Staphylococcus E) Streptococcus