99 Percentile Qs Bank for JEE MainChemistryBiomolecules
Which of the following is not true about DNA and RNA?
Options
- AUnlike DNA, RNA is almost always a single-stranded molecule and has a much shorter chain of nucleotides.
- BRNA contains ribose, rather than the deoxyribose found in DNA
- CDNA is a long polymer of nucleotides (a polynucleotide) that encodes the sequence of amino acid residues in pr
- DDNA is less stable than RNA
Correct answer
D. DNA is less stable than RNA
Step-by-step solution
Unlike DNA, RNA is almost always a single-stranded molecule and has a much shorter chain of nucleotides. RNA contains ribose, rather than the deoxyribose found in DNA (there is a hydroxyl group attached to the pentose ring in the 2 ' position whereas RNA has two hydroxyl groups). These hydroxyl groups make RNA less stable than DNA because it is more prone to hydrolysis. Several types of RNA (tRNA, rRNA) contain a great deal of secondary structure, which help promote stability. Deoxyribonucleic acid (DNA) is a n