Heredity B

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EwwPhysics
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Re: Heredity B

Post by EwwPhysics »

RitikaKK wrote: Fri Mar 06, 2020 7:52 am 40. Which of the following is not a post-transcriptional modification commonly made to transcripts in eukaryotic cells?
A. A modified guanine is added to the 3’ end of the transcript
B. Exons are spliced out
C. A string of adenines is added to the 5’ end of the transcript
D. All of the above

What answer choice do you think it would be?
The answer key says D, but I disagree because introns are spliced out, not exons.
Yes, I agree. The answer should be B as far as I can tell.
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Re: Heredity B

Post by Ulnar »

EwwPhysics wrote: Sat Mar 14, 2020 1:49 pm
RitikaKK wrote: Fri Mar 06, 2020 7:52 am 40. Which of the following is not a post-transcriptional modification commonly made to transcripts in eukaryotic cells?
A. A modified guanine is added to the 3’ end of the transcript
B. Exons are spliced out
C. A string of adenines is added to the 5’ end of the transcript
D. All of the above

What answer choice do you think it would be?
The answer key says D, but I disagree because introns are spliced out, not exons.
Yes, I agree. The answer should be B as far as I can tell.
I think D means that "all of the above statements" are incorrect. A is incorrect since the guanine cap is added to the 5' end, not the 3', and C is incorrect because the Poly-A tail is on the 3' end, not the 5'. You guys already established that B is also incorrect, so the answer would be D.
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Re: Heredity B

Post by Tailsfan101 »

RitikaKK wrote: Fri Mar 06, 2020 7:52 am 40. Which of the following is not a post-transcriptional modification commonly made to transcripts in eukaryotic cells?
A. A modified guanine is added to the 3’ end of the transcript
B. Exons are spliced out
C. A string of adenines is added to the 5’ end of the transcript
D. All of the above

What answer choice do you think it would be?
The answer key says D, but I disagree because introns are spliced out, not exons.
The answer key is correct; the guanine cap is added to the 5' end, and the poly(A) tail is added to the 3' end.
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Re: Heredity B

Post by EwwPhysics »

Sorry RitikaKK, I overlooked that >w< will try not to read carelessly next time
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Codebusters - 2nd states
Disease Detectives - 5th states
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Designer Genes - 1st states
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