In an attempt to locate the expression levels of the respective transcripts. Del

Question

In an attempt to locate the expression levels of the respective transcripts. Deletions were to locate the promoter for the SS-TRNA gene and the results are shown below. The transcription start site (TSS) is numbered +1 genes' promoters, researchers conduct deletion mutations and then measure made in an experiment designed eetionLevel of transcription ( for no expression, + for low levels of expression,* 45 through-+ +1 to +47++ for high levels of expression) +1 to +63+ +50 to +80 +80 to +120+++ 24. From the data above, it can be concluded that the transcription factor binding sites for RNA polymerase III are located A) Upstream of the coding region (5" to the coding region) B) In the region between +50 and +80 within the coding region C) In the region +80 to +120 within the coding region D) Downstream of the coding region E) In the region -45 through -1 upstream of the coding region. 25. You are studying a biochemical pathway. Preliminary results suggest that this pathway is subject to end-product repression. This pathway is therefore most likely to be a(n) pathway. A) anabolic B) catabolic C) constitutive D) induced E) unregulated

Explanation / Answer

ANSWER:

Ans. 21) ‘B’ is the correct answer. Poly A tail is added to 3’ end of mRNA during the process.

Ans. 22) ‘A’ is the correct answer. Larger product is due to presence of both Introns and Exons.

Ans. 23) ‘A’ is the correct answer. The sequence is followed as given in ‘A’.

Ans. 24) ‘A’ is the correct answer. The transcription factor binding sites are present upstream of coding region.

Ans. 25) ‘B’ is the correct answer. Catabolic Pathway represses the end product.

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