AAMC scored Test B/B #59

[kwu]

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Hi,

How do I know the maximum number of amino acids that can be formed from an X number of mRNA bases?

I understand that 3 bases = 1 codon = amino acid. But I also know that the 3rd base is a Wobble position. That leaves us with 2 bases = 1 amino acid.

In their explanation, they didn't consider the Wobble position. Is a mistake or am I just overthinking this question?

 

[aldol16]

You're overthinking it. Whether the 3rd base is wobble or not doesn't matter because you still need a third base there to code for an amino acid. For example, if you had GAG, that would code for something, and GAC would code for something but GA wouldn't because there's only two bases there. Also keep in mind that the stop codons don't code for amino acids.

 

[kwu]

You're overthinking it. Whether the 3rd base is wobble or not doesn't matter because you still need a third base there to code for an amino acid. For example, if you had GAG, that would code for something, and GAC would code for something but GA wouldn't because there's only two bases there. Also keep in mind that the stop codons don't code for amino acids.

Got you. Thanks aldol!

 

[Mr. otcoD]

You're overthinking it. Whether the 3rd base is wobble or not doesn't matter because you still need a third base there to code for an amino acid. For example, if you had GAG, that would code for something, and GAC would code for something but GA wouldn't because there's only two bases there. Also keep in mind that the stop codons don't code for amino acids.

I remember the stop codons (i feel like we've had to because ive seen questions on it) by remembering the following:
You Go Away (UGA)
You Are Away (UAA)
You Are Gone (UAG)

 

[kwu]

I remember the stop codons (i feel like we've had to because ive seen questions on it) by remembering the following:
You Go Away (UGA)
You Are Away (UAA)
You Are Gone (UAG)

Thanks a lot Mr. You made it a lot easier! Wish you the best

 

[Sadlyanon]

I know this is old, but shouldn't the answer be 499, because the stop codons do not code for an amino acid?

But shoudnts

You're overthinking it. Whether the 3rd base is wobble or not doesn't matter because you still need a third base there to code for an amino acid. For example, if you had GAG, that would code for something, and GAC would code for something but GA wouldn't because there's only two bases there. Also keep in mind that the stop codons don't code for amino acids.

 

[aldol16]

I know this is old, but shouldn't the answer be 499, because the stop codons do not code for an amino acid?

I don't know the question.

 

[Sadlyanon]

 

[Sadlyanon]

I don't know the question.

^

 

[aldol16]

Then I agree - 499 is a better answer. I suppose that one could include not only functional transcripts but also non-functional ones. For instance, a mutation could wipe out the stop codon and instead code an amino acid. That transcript probably wouldn't be successfully transcribed but would still code for 500 amino acids.