DAT question that stumped everyone

[evlyann]

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Hey guys,

I was given a heads up on a rather strage question that has been appearing on the DAT. Everyone who I have spoken to had no clue how to solve it. Has anyone gotten this question and if yes, do you know how to get to the answer? Any help is much appreciated!

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

A:
1000
300
25
1

 

[kiwi61385]

is the answer 1?

 

[pmukti]

how????

 

[evlyann]

I have no idea wha the answer is. If you have some sort of mechanism for even obtaining an answer please post it so that everyone can benefit from it. Even a biochem professor could not understand how to solve this question.

For 20 AA you have 3Codons (tRNA) so if you take 12000/3 u get 4000. THen what? I am so confused.😱

 

[StudentDentist]

your friend remembered teh question incorrectly. that's where the confusion arises. from the question you wrote, either the question was misstated, or the answer choices are incorrect.

solving this type of question is VERY easy. assuming teh Q/A are accurate.

 

[1PersianDDS]

your friend remembered teh question incorrectly. that's where the confusion arises. from the question you wrote, either the question was misstated, or the answer choices are incorrect.

solving this type of question is VERY easy. assuming teh Q/A are accurate.

hahaha, good one.

 

[StudentDentist]

hahaha, good one.

who's joking? it ain't me. this question is easy as hell, but some of the numbers are off.

 

[evlyann]

Hey Student Dentist, You might be right that the numbers are off. Is it the same type of question that I think it was? Like when they give you a certain number of peptide bonds and ou have to figure out how many amino acids there are using the 3 codon sequence?

 

[StudentDentist]

Hey Student Dentist, You might be right that the numbers are off. Is it the same type of question that I think it was? Like when they give you a certain number of peptide bonds and ou have to figure out how many amino acids there are using the 3 codon sequence?

right, in general. you figure out the number of AA, and there's a 1:1 ratio of AA:tRNA

peptide bonds refer to the bonds btwn AA's, not btwn codons. so the factor of 3 is not applicable.

 

[Orthodox Bear]

I heard about that question too, but you quoted it wrong. I dont recall the exact numbers but the answer was a 1:1 ratio

 

[erichen]

for a polypeptide sequence, wouldn't the ratio be 1:n-1, since the end amino acid doesn't need to bond...only the tRNA:amino acid ratio is one to one right?

is it just testing if you know that tRNA are specialized molecules?