The sigma subunit of bacterial RNA polymerase is required for?
a. termination of transcription
b. initiation and termination of transcription
c. recognition and specific binding to the promoter
d. all of the answers are correct
Ans: c. recognition and specific binding to the promoter
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In which part of the immune system are M cells found?
a. lymph nodes b. spleen c. mucosa-associated lymphoid tissue d. diffused in the lymph
Survivorship curves plot ________ against x
A) dx B) lx C) log lx D) qx
Archaea and bacteria diverged approximately:
A) 3 billion years ago. B) 2 billion years ago. C) 4 billion years ago. E) 10,000 million years ago.
All of the following are true regarding pedigree analysis EXCEPT that it
A) documents the transmission of a genetic characteristic over two or more generations. B) is exclusively used to study the patterns of inheritance in dogs. C) reveals whether a trait is dominant or recessive. D) can incorporate molecular biology techniques.