BIO question

[299678]

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Bacterium contains 3960 amino acids. Given the information that 4 is the average number of amino acids per polynucleotide for this bacterium, what is a good estimate for the total number of genes of this organism?
a) 160 b) 330 c) 990 d) 1320

 

[amcmahon]

990 seems to be the obvious answer but because you posted the question here I would say... 330 because within the bacteria genome are operon regions that do not code for a polypeptide but are binding sites for regulatory proteins.

 

[299678]

AMCM you have a right answer, but could you explain me in more details how to count that number?

 

[Baylor2011]

I think its just a logical guess. 3960 / 4 = 990. Then factor in that bacteria have operons...take the next one down. Not sure if there's a mathematical formula for this

 

[RCT PC CRN]

Eukaryotes - One gene, one protein (monocistronic)
Prokaryotes - One gene often code for more than one polypetide (polycistronic)