Question

Can someone help me label these. The options are Deoxyribose sugar, guanine, phosphate, and adenine.

Answer 1

1. Phosphate

2. Guanine

3. Deoxyribose sugar

4. Adenine

Explanation: Remember the base pairing rules: cytosine with guanine and adenine with thymine, so whenever there's cytosine, there's guanine, and vice versa (the rules are a little different with adenine and thymine in terms of RNA). In the phosphate-sugar backbone, the phosphate will always be on the outside, and the sugar will always be found attached to the nitrogenous base.

Hope this helps,

Lacia