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Biomolecules

Question

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Which one from those given below represents the position of nitrogen in the 9-membered double rings of purines?

2, 4, 6 and 8

1, 3, 7 and 9

1, 4, 8 and 9

3, 5, 7 and 8

Solution

B.

1, 3, 7 and 9

Purines are 9-membered double rings with nitrogen at 1, 3, 7 and 9 positions. DNA has two types of purines namely Adenine (A) and Guanine (G).

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Give the names of two nucleotides.

What are carbohydrates ?

Give the names of two vitamin nucleotides.

What are the different types of carbohydrates ?

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