A bacterial ________ is the nontranscribed region of the DNA to which RNA polymerase binds in order to initiate transcription.
A. initiator
B. operon
C. promoter
D. operator
Answer: C
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A large deletion removes the promoter and first three exons of a gene. No mRNA or protein is detected. What type of allele is this mutant allele?
A) hypomorphic allele B) hypermorphic allele C) null allele D) antimorphic allele
Most digestion occurs and most nutrients and water are absorbed in the __________. Fill in the blank(s) with the appropriate word(s)
How is the four-letter language of nucleic acids converted into the twenty-word language of amino acids?
a. The four nucleic acid bases combine in two-letter combinations that define different amino acids. b. The four nucleic acid bases combine in three-letter sequences that define different amino acids. c. Triplets of the two-letter nucleic acid bases are translated into the twenty different amino acids. d. The four bases each specify one amino acid, which in combination give rise to the remaining sixteen amino acids. e. The four bases are first converted into tRNA molecules, which can each attach to five amino acids.
You could increase the amount of product produced over a given amount of time in an enzyme-mediated reaction by
A. adding ice. B. adding an inhibitor. C. adding more enzyme. D. boiling the enzyme.