Question

21. Genes within an operon: A) Tend to be regulated by a common regulatory mechanism. B) Are generally involved in the same biochemical pathway. C) Are expressed as a polycistronic RNA. D) All of the above. E) None of the above. 22. Consider the following multicistronic cassette in a bacterium, 15 = Gene A Gene B Gene CH 3 3 If the number of promoters is m, the number of Ribosome binding sites is n, and the number of start codon is p What is the minimal value of m+n+p ISP A) 5 C) 7

Answer 1

Q21. Answer is option D. That is all of the above.

Because genes within an operon are generally expressed as polycistronic RNA, they are also regulated by common regulatory mechanism and generally they are involved in the same biochemical pathway.

Q22. Answer is option B. 6

Because as it is multicistronic casette it will have minimum 1 Promoter (m), as here there is 3 genes present so it will have minimum 2 ribosome binding sites (IRES) (n) and for 3 genes 3 start codon (p).

So, m+n+p= 1+2+3=6.

So m+n+p should be minimum 6.