Regardless of its strength, the binding of a protein to other biological molecules always shows great _________: each protein molecule can bind to just one or a few molecules out of the many thousands of different molecules it encounters.
举一反三
- Many—if not most—protein molecules are _______: they can adopt two or more slightly different conformations, and their activity can be regulated by a shift from one to another.
- Each protein normally folds into a single stable conformation. This conformation, however, often changes dramastically when the protein interacts with other molecules in the cell.
- Which of the following signaling molecules could be directly activated by Ca ion binding? A: cAMP B: Calmodulin C: Protein kinase A D: Protein kinase B E: Protein kinase G
- Moisture in food can be divided into "bound water" and "free water" according to different properties. Which of the following is not bound water? A: The first layer of water molecules adsorbed to glucose molecules B: Water molecules with unpaired electrons entering the outer empty orbits of sodium ions C: Water molecules adsorbed in capillaries in food tissue D: Water molecules bound to the negative ion of glutamic acid on the protein peptide chain
- To synthesize one molecule of cholesterol consumes 18 molecules of acetyl-CoA.