Use the drop-down menus to label the parts of a nucleotide.
Label A
Label B
Label C
Label D
Label E
Label F.

A and F are phosphate groups.

B and E are sugars.

C and D are nitrogenous bases.

Explanation:

Nucleotides are the molecules responsible for composing DNA and RNA. They are formed by three units: a phosphate group, a sugar molecule and a nitrogenous base.

The sugar molecule is a pentose, which means that it is a molecule formed by 5 carbons. These collections are represented by geometrical figures such as the letters "B" and "E" shown in the figure above, where each tip represents a carbon.

The nitrogenous bases are molecules that are named adenine (A) and guanine (G) and the pyrimidine bases cytosine (C), uracil (U) and thymine (T).

The phosphate group, in turn, is a molecule derived from phosphoric acid and is the only one that does not vary in each nucleotide.

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