Final answer:
EF-G-GDP resembles a tRNA molecule, which plays a role during protein synthesis on ribosomes. ATP is considered to have high potential energy; however, glucose and sucrose may have more stored energy due to their high-energy bonds.
Step-by-step explanation:
The molecule that EF-G-GDP resembles is tRNA. Elongation factor G (EF-G) in its GDP-bound state mimics the shape and size of a tRNA molecule. This is significant during the process of protein synthesis on ribosomes. During protein elongation, EF-G-GDP binds to the ribosome and facilitates the translocation of tRNA and mRNA. This action is similar to the movement of tRNA from the A site to the P site and then to the E site within the ribosome.
ATP is known to possess high potential energy. However, with regards to the other options provided (ADP, glucose, sucrose), glucose and sucrose could potentially have more stored energy overall because they contain multiple high-energy bonds that can be broken down during cellular respiration. The actual amount of potential energy released can depend on the specific pathways and cells involved.