Final answer:
Coenzyme A (CoA) is a carrier molecule used in different steps of ring synthesis and oxidation. It is derived from pantothenic acid (vitamin B5) and donates an acetyl group in reactions such as fatty acid metabolism and the Krebs cycle.
Step-by-step explanation:
The carrier that is utilized in two different steps to add to the ring is coenzyme A (CoA). CoA is derived from pantothenic acid, which is a vitamin B5 derivative. It donates an acetyl group in biochemical reactions, particularly in the synthesis and oxidation of fatty acids, and in the Krebs cycle where acetyl-CoA is an important intermediate.
Coenzyme A (CoA) is the carrier used in two different steps to add to the ring. It is derived from pantothenic acid (vitamin B5) and donates acetyl groups.
In biology, the carrier used in two different steps to add to the ring is the Coenzyme A (CoA). CoA is derived from the vitamin pantothenic acid (vitamin B5) and is involved in various metabolic reactions in the body.
CoA acts as a carrier of acetyl groups, which are transferred to the molecule being modified. It donates the acetyl group by forming a high-energy thioester bond with the acetyl group, making the transfer of acetyl groups thermodynamically favorable.