σ factors bind to what types of sequences on DNA? a. Shine-Delgarno sequences. b. TATA box regions. c. -10 and -35 sequences. d. None of the above.
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σ factors bind to what types of sequences on DNA?
| a. |
Shine-Delgarno sequences. |
|
| b. |
TATA box regions. |
|
| c. |
-10 and -35 sequences. |
|
| d. |
None of the above. |
Sigma (σ) factor of RNA polymerase holozyme is a DNA binding promoter that determines transcription initiation by the isolating DNA strands.
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- In gene silencing, the “dicer” enzymea. assembles siRNAs into a RISC complex.b. unwinds the RISC complex.c. binds siRNA to mRNA sequences complementary to it.d. slices up double-stranded RNA moleculesWhich of the following is true of reverse transcriptase?a. It is required for the movement of DNA transposons.b. It catalyzes the synthesis of DNA from RNA.c. It is required for the transposition of retrotransposons.d. b and c are correct.Which of the following best represents the central dogma of geneexpression?a. During transcription, DNA codes for polypeptides.b. During transcription, DNA codes for mRNA, which codes forpolypeptides during translation.c. During translation, DNA codes for mRNA, which codes forpolypeptides during transcription.d. none of the above
- In the paper we read at the beginning of the term the coat color differences in the beach mice were driven by change in the melanocortin-1 (MCR-1) gene between the color morphs. Based on this information what can you conclude about the mutation causing the color change? a. It is a nonsynonymous substitution. b. The mutation is considered silent. c. The mutation is a transition. d. It is a synonymous substitution.What type of mutation causes the "mutant" variety of the PTC gene? a A point mutation which lead to a nonsense mutation b A addition mutation which lead to a frameshift c A substitution mutation which lead to a missense mutation d A deletion mutation which lead to a SNP mutationThe CRISPR-Cas9 system can be used to: a. sequence a genome in living cells b. edit a gene in living cells and organisms c. diagnose sickle-cell anemia d. identify a specific gene e. detect gene expression under different conditions
- Which sequence is most likely to be found in a promoter? a) CGGTGTATATCGTAC b) GTACAGTCATCCCGT c) AAATCTACTACGATT d) GGGTTGGGTTGGGTThow does the E.coli RNA polymerase find the gene's promoter to be transcribed? A. the TATA sequence. B. the sigma factor C. the apoenzyme D. the -35 sequencea.What is gene conversion? b.What is an anticodon?
- A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA nucleotides c. a protein that binds to DNA d. an enzyme that synthesizes RNAWhy do plants and animals thrive with so many transposable elements in their genomes?a. Most of the transposable elements are inactive dueto mutation.b. Active transposable elements are silenced by thehost.c. Most transposable elements are inserted in safehavens.d. All of the above are true.You are studying a new gene that is expressed within the adipose tissue of humans during the development of diabetes. Specifically, you want to learn why gene expression levels are very high in those people who develop diabetes. What DNA sequence would you concentrate on? Group of answer choices A specific response elements B the TATA box C enhancer sequences D promoter proximal elements E metal response elements