Transcription starts at a _________ and ends at a ____________.
a. transcriptional start site; terminator
b. promoter; 5' end
c. promoter; terminator
d. 3' end; 5' end
Ans: c. promoter; terminator
Biology & Microbiology
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The loudest sounds a nurse hears while listening to a patient's heart through a stethoscope are caused by
A. closing of the AV valves. B. opening of the semilunar valves. C. depolarization of the ventricles. D. contraction of the atria. E. contraction of the ventricles.
Biology & Microbiology
The age structure diagram for India is most like
a. A. b. B. c. C. d. D. e. none of these.
Biology & Microbiology
A specific stretch of DNA that programs the amino acid sequence of a polypeptide is a ________
A) gene B) protein C) nucleic acid D) enzyme
Biology & Microbiology
Organisms that are radially symmetrical have ________ embryonic germ layers
A) two B) three C) four D) five E) six
Biology & Microbiology