Researchers found that the arginine code AGG is poorly represented in genes of E.coli. Interestingly, they also found that this triplet, when present, binds to the ribosome 7-9 base pairs upstream from the starting ATG triplet (methionine). What does this information suggest in regard to the AGG codon?
A. it is a codon rarely found in this bacterium
B. it is conserved in most prokaroytic organisms
C. it may have a regulatory function in the cell
D. both B and C
E. A, B and C
2007-02-10 06:50:42 · 4 answers · asked by Anonymous in Science & Mathematics ➔ Biology
C, this is an example of the post-trascriptional regulation of gene expression.
2007-02-10 06:51:11 · answer #1 · answered by kz 4 · 0⤊ 0⤋
Well, that the AGG codon is rarely found in the E.coli genome (poorly represented) it is stated in the question, so I would certainly call A in. That it has a regulatory function is also suggested, as it binds 7-9 base pairs upstream of the intiating codon (ATG, Met), therefore C must also be right. I am not sure whether you can conclude that this mechanism is conserved among prokaryotes, but I would be tempted to go with E rather than with C alone.
2007-02-10 15:55:11 · answer #2 · answered by Jesus is my Savior 7 · 0⤊ 0⤋
C. it may have a regulatory function in the cell
2007-02-10 14:54:04 · answer #3 · answered by Nurse KeVo 5 · 0⤊ 0⤋
c
2007-02-10 15:36:49 · answer #4 · answered by urbaninvisible 2 · 0⤊ 0⤋