Biochemistry - Nucleic Acids - Discussion

Discussion :: Nucleic Acids - Section 1 (Q.No.11)


A five carbon sugar lacking a hydrogen at the number 2 carbon is found in

[A]. DNA
[B]. RNA
[C]. mRNA
[D]. rDNA

Answer: Option A


No answer description available for this question.

Tania said: (Aug 30, 2013)  
Because at 2 carbon position in DNA their is a hydrogen group while in RNA there is hydroxyl group at number 2 carbon.

Dr.Laxman Rao Goje said: (Nov 7, 2013)  
In question itself 'Oxygen' should replace at 'Hydrogen'. The sugar in DNA is 2-deoxyribose, means oxygen lacking at 2nd carbon ribose.

Mazjobrani said: (Jun 1, 2014)  
Yes, question is incorrect for the indicated answer.

A five carbon sugar lacking a hydrogen at number 2 carbon is found in: RNA ( hydroxyl groups).

A five carbon sugar with a hydrogen at number 2 carbon is,
found in: DNA ( Deoxyribonucleotide - has 2 H's).

Atique said: (Sep 11, 2015)  
Its oxygen that is absent.

Nikhil said: (Nov 9, 2016)  
The question is absolutely right DNA lack the hydrogen atom at 2 carbon group whereas in RNA the hydroxyl group is present.

Sandra said: (Nov 25, 2016)  
I agree with you @Laxman Rao.

Sandra said: (Nov 25, 2016)  
I agree with you @Laxman Rao.

Josh said: (Jan 2, 2017)  
I think the question is wrong for the indicated answer.

DNA lacks OH at 2 C group not H.

Alex said: (Feb 19, 2017)  
I agree @ Dr.Rao and @Josh.

Mohammad Khurram said: (Jan 8, 2018)  
I agree @Josh.

Because in this question said the lacking of h on C2 means lacking of hydrogen atom So it's clear that RNA lack H at carbon 2 and having OH group.

Or the other sense both have one hydrogen at C 2 but RNA also contains OH in case of DNA its contain H so RNA lack hydrogen in another side of carbon.

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