A) The length of DNA is defined as the number of base pairs present in it
B) Cytosine is common to both DNA and RNA
C) In a nucleotide, the nitrogenous base is linked to a phosphate group
D) Thymine is chemically 5-methyl uracil
Correct Answer: C
Solution :
[c] In a nucleotide, the \[5'-OH\]of a nucleoside (rather than a nitrogen base) is linked to a phosphate group. DNA acts as a genetic material in most organisms. It is a long polymer of deoxyribonucleotides. The number of nucleotides present in the DNA determines its length. A nucleotide is composed of a nitrogenous base, pentose sugar and a phosphate group. Best all other statements are correct for DNA.
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