Answer all three questions please cs a 9711010.pdf G bis 2a DNA content Add-ons

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Answer all three questions please

cs a 9711010.pdf G bis 2a DNA content Add-ons Help All changes saved in Drive Aria 18. Generally speaking the genes for regulatory hat proteins directly detect environmental signals for example, the Lac Repressor protein) are transcribed a All the time (constitutively b Only when the genes they regulate are transcribed c. Only when the genes they regulate are not transcribed d only when the signal they detect is present 19. The fastest way to negatively regulate an enzymatic activity would be a. Mutate the gene b Turn off transcription of its gene c vent translation of its mRNA d. Prevent degradation of the protein e Allosteric inhibition of the protein 20. A po the DNA strand for a transcript emplate has the sequence 5'ATTCGATG 3 What's the sequence of the resulting mRNA? a 5' CAUCGAAU 3 b 5 CATCGAAT 3 UAAGCUAC 3 d 5 CUTCGUUA 3 e 5 TAA GCTAC 3 23. The eukaryotic RNA polymerase ll, required for mRNA production cannot recognize

Explanation / Answer

Ans 18:- (b).Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (especially mRNA) by the enzyme RNA polymerase.The stretch of DNA transcribed into an RNA molecule is called a transcription unit and encodes at least one gene. If the gene encodes a protein, the transcription produces messenger RNA.So,(b) is the correct answer.

Ans 19:- (e).

Ans 20:- ------

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