Question

dna and mrna synthesis proceeds in the 5 to 3 direction. what does 5 and 3 mean? a) the position of the phosphate and nitrogen bases b) the position of a carbon atom in the sugar backbone c) the number of carbons in the nitrogen base d) the number of hydroxyl groups attached

Explanation:

The 5' and 3' refer to the position of carbon atoms in the sugar - phosphate backbone of DNA and RNA. The 5' carbon has a phosphate group attached and the 3' carbon has a hydroxyl group. DNA and RNA synthesis occurs in the 5' to 3' direction.

Answer:

B. The position of a carbon atom in the sugar backbone