(1). What of the following are cis-acting sequences? A). promoters B).Enhancers
ID: 3166084 • Letter: #
Question
(1). What of the following are cis-acting sequences?
A). promoters
B).Enhancers
C).Repressors
D). Two of the above
E). All of the above
(2). Formation of double - stranded RNAs inside of the cell activates the RNA interference mechanisms involving the enzyme complexes DICER and RISC, leading to the destruction or inactivation of target mRNAs. How is RISC, guided to the mRNA that is to be destroyed or inactivated?
A). There is a RNA -binding protein in RISC which recognize the consensus sequence in the target mRNA.
B). RISC includes ribosomal proteins and RNAs which bind to The Shine- Delgarno sequence of the mRNAs.
C). the strand of the double - stranded RNA that is complementary to be sequences of a specific target messenger RNA serves as the "guide".
D). Two of the above
E). All of the above.
(3). When a transcription factor functions as an activator binds an enhancer sequence, which of the following types of enzymes is it likely to recruit in order to activate transcription?
A ). Histone acetyltransferases
B). Histone deacetylases
C). Histone methyltransferases
D). Histone demethylases
E). Two of the above.
F). All of the above.
Explanation / Answer
Ans. 1 two of the above, promoters and enhancers. These two are cis acting molecules.
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