BIO question

[299678]

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In a 12,000 mol polypeptide chain how many mol of tRNA are there?

 

[hausee]

In a 12,000 mol polypeptide chain how many mol of tRNA are there?

Is it a 12k g/mole polypeptide chain? If so then average of all AAs is about 135 g/mole, you will have about 12,000/135=89 AAs. Each AA is transferred by one tRNA, so there will be 89 tRNAs

 

[Avery07]

In a 12,000 mol polypeptide chain how many mol of tRNA are there?

Is it a 12k g/mole polypeptide chain? If so then average of all AAs is about 135 g/mole, you will have about 12,000/135=89 AAs. Each AA is transferred by one tRNA, so there will be 89 tRNAs

Are you taking about mols or molecules?

I'm not sure what this mol business is as it seems that would be way to crazy of a question to ask (why would they be mixing biology with chemistry).

If molecules, divide the 12,000 amino acids by 3 (3 amino acids/tRNA) and you get 4,000 tRNA molecules.

 

[AmpedUp]

This is something you encounter in Biochemistry. I'm pretty damn sure this is out of the scope for the DAT if it's asked in this form. Don't kill yourself trying to know this stuff. I'm sure if they ask a question like this, they'll provide weight of an AA. And yes, like someone mentioned, it's true that the average weight of an AA is 135 g/mol. I guess you can keep that number in the back of your mind...If not, I wouldn't sweat it.

 

[gentile1225]

Definitely not a DAT question, more biochem.

 

[299678]

This was the one in actual DAT long times ago. Answer choices given were
a) 1 b) 1000 c) 300 I don't remember after this.
I think correct answer should be 1 or 1000

 

[299678]

Another question
Q. What is the maximum number of amino acids in a peptide coded by a (GCAU)4 nuclotide chain?

 

[hausee]

Ok I think you remembered the questions wrong. How can you find tRNA in polypeptide?

 

[Denty8]

Where are you coming up with all these questions; destroyer, kaplan, achiever?

 

[hausee]

ok, lets close this topic. I dont want to see ppl wasting time on this one.
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