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Biomolecules — Chemistry STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules5 Marks
Question
Differentiate between DNA and RNA.
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Answer

Differences between DNA and RNA
DNARNA
1. DNA is deoxyribonucleic acid.1. RNA is ribonucleic acid.
2. DNA occurs in the nucleus of the cell in chromosomes.2. RNA occurs mainly in the cytoplasm of the cell.
3. DNA has double-stranded helix and both the helical strands are coiled in opposite directions.3. Generally, RNA is formed of a single strand. Double-stranded RNA is also found but they are non-helical. RNA molecule may be coiled on itself.
4. DNA nucleotides consist of deoxyribose sugar.4. RNA nucleotides consists of ribose sugar.
5. The nitrogenous bases found in DNA are: Purine bases Adenine and Guanine. Pyrimidine bases: Cytosine and Thymine.5. The nitrogenous bases found in RNA are: Purine bases: Adenine and Guanine. Pyrimidine bases: Cytosine and Uracil.
6. DNA is the genetic material.6. RNA when present with DNA is not the genetic material.

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