Q2 of 71 Page 36

A nucleoside differs from a nucleotide. It lacks the:

Nucleotide: It is composed of a nitrogenous base, pentose sugar ( either deoxyribose or ribose) and phosphate group (PO4).


Nucleoside: It is composed of a nitrogenous base and pentose sugar (either deoxyribose or ribose). But it does not have a phosphate group.


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1

In a DNA strand the nucleotides are linked together by:

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Both deoxyribose and ribose belong to a class of sugars called:

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The fact that a purine base always pairs through hydrogen bonds with a pyrimidine base in the DNA double helix leads to:

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The net electric charge on DNA and histones is: