Question

all questions
1 2 3 4 5 6 7 8 9 10 11-15
question 3.
describe two differences in the chemical makeup of dna and rna.
review the information above. then enter your answer and your explanation in the box provided.

Explanation:

1. DNA uses the sugar deoxyribose, while RNA uses ribose; ribose has an extra oxygen-containing hydroxyl group on the 2' carbon that deoxyribose lacks.
2. DNA contains the nitrogenous base thymine (T), while RNA replaces thymine with uracil (U); uracil has a hydrogen atom instead of the methyl group present on thymine.

Answer:

1. Sugar component: DNA contains deoxyribose sugar, RNA contains ribose sugar.
2. Nitrogenous base: DNA has thymine (T), RNA has uracil (U) instead of thymine.