An enzyme will specifically bind its substrate because of: a tight lock-and-key
ID: 1009239 • Letter: A
Question
An enzyme will specifically bind its substrate because of: a tight lock-and-key binding mechanism. a high number of hydrophobic amino acids in the center of the protein. a large number of weak interactions at the active site. additional nonprotein cofactors. None of the above. Which of the following Is true? Enzymes force reactions to proceed in only one direction. Enzymes alter the equilibrium of the reaction. Enzymes alter the standard free energy of the reaction. All of the above. None of the above. The Gibbs free energy of activation is: the difference between the substrate and the transition state. the difference between the substrate and the product. the difference between the product and the transition state. All of the above. None of the above. The rate of a reaction, or how quickly a reaction will proceed, is best determined Delta R Delta G Delta degree Delta H None of the above. The active site of an enzyme: is a series of amino acids which bind the enzyme. is a linear sequence of amino acids that react with each other. binds covalently to the substrate. allows water to enter into the active site and thereby solvate the substrate. None of the above.Explanation / Answer
1.
A) is correct. (The enzyme-substrate binding took place in a simple "lock-and-key" fashion. This model asserted that the enzyme and substrate fit together perfectly in one instantaneous step. )
2.
E) is correct.(None of the above statement is true.)
3.
A) is correct (The Gibb’s free energy of activation is the difference between substrate and transition state.)
4.
B) is correct.
5.
A) is correct.(The active site of an enzyme is a series of amino acids which bind the enzyme.)