What must occur for bacterial conjugation to take place?
a. The cells must come into contact with each other.
b. Each cell must contain a plasmid.
c. One of the cells must be E. coli.
d. The cells must transfer RNA.
Ans: a. The cells must come into contact with each other.
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Which of the following is notan example of a regulatory DNA site?
A. enhancer B. insulator C. repressor D. operator
A frog's immature stage is a tadpole; therefore, the development of a frog is
A. direct. B. indirect. C. incomplete. D. delayed. E. circumstantial.
Synthetic auxins are used as
a. pesticides. b. herbicides. c. fungicides. d. insecticides. e. all of these.
S-layer is:
A. the layer between inner and outer membrane in gram negative bacteria B. also known as slime layer C. common among archaea D. there is more than one correct answer E. made of polysaccharides