Question

1)

Complete the paragraph that follows by entering the correct term from the list below in each space. Not all terms will be used and none may be used more than once. Be sure to check your spelling carefully.

irreversible     coenzyme allosteric GDP molecular switch    reversible prosthetic ATP

Many proteins are controlled by ___________ regulation , where a ligand binds to part of the protein other than the active site. Others are subject to ____________ covalent modification with phosphoryl, methyl, or other functional groups that affect protein activity. The activity of GTP-binding (G) proteins is dependent on whether they have GTP or__________ bound to them. G proteins are one example of a_____________ , where the same protein can exist in either of two stable states that have alternate activities.

Answer 1

Many proteins are controlled by allosterice gulation , where a ligand binds to part of the protein other than the active site. Others are subject to reversible covalent modification with phosphoryl, methyl, or other functional groups that affect protein activity. The activity of GTP-binding (G) proteins is dependent on whether they have GTP or GDP bound to them. G proteins are one example of a molecular switch where the same protein can exist in either of two stable states that have alternate activities.