A) thymine
B) deoxyribose sugar
C) uracil
D) cytosine
Correct Answer: C
Solution :
RNA differs from DNA in 3 ways : (i) The sugar phosphate backbone contains ribose rather than deoxyribose. (ii) It contains the base uracil (U) instead of thymine. (iii) It exists mostly as a single stranded rather than a double stranded helix. Thymine is a pyrimidine present in DNA but not in RNA. In deoxyribose sugar, hydrogen is present at 2 position. Cytosine is pyrimidine present both in RNA and DNA.
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