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DNA

The two main ...

Question

The two main differences between RNA and DNA are:

A

ribose sugar and thymine in RNA

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B

deoxyribose sugar and uracil in DNA

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C

ribose sugar and uracil in RNA

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D

deoxyribose sugar and guanine in DNA

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Solution

The correct option is C ribose sugar and uracil in RNA
The two main differences between RNA and DNA are:
RNA has a ribose sugar instead of a deoxyribose sugar like DNA.
RNA nucleotides have a uracil base instead of thymine.

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Q. Write the main structural difference between DNA and RNA. Of the bases, thymine and uracil, which one is present in DNA?

Q. Assertion :Purine bases present in DNA are adenine and guanine. Reason: The base thymine is present in RNA while base uracil is present in DNA.

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Column I	Column II
(A) Nucleoside	(i) Sugar + base + phosphate group
(B) Nucleotide	(ii) Cytosine + uracil
(C) DNA	(iii) Sugar + base
(D) RNA	(iv) Cytosine + thymine

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