Question

Enzymes are biological catalysts and Unction by A) increasing the free energy in a system. B) lowering the activation energy of a reaction. C) lowering entropy in a system. D) increasing the temperature near a reaction. E) altering the equilibrium of a reaction. Which of the following contributes to the specificity of enzymes? A) Each enzyme has a wide range of temperature and pH optimum B) Each enzyme has an active site that interacts with many C) Substrates themselves may alter the active site slightly for D) Enzymes are more active at higher temperatures. E) All of the above Coenzymes and cofactors, as well as prosthetic groups, assist en A) stabilizing three-dimensional shape. B) assisting with the binding of enzyme and substrate. C) maintaining active sites in an active configuration. D) reversibly binding to the enzyme to regulate the enzyme's E) a, b, and c only Which of the following statements about enzymes is true? A) They are consumed by the enzyme-mediated reaction. B) They are not altered by the enzyme-mediated reaction. C) They raise activation energy. D) They can be composed of RNA or proteins. E) They are only rarely regulated.

Answer 1

Q2: B- Lowering the activation energy.

Q3: C-substrate themselve might alter active site slightly for catalysis.

Q4: E(A, B and C) are true.

Q5: B they are not altered by enzyme mediated reaction. &D they are composed of RNA and proteins.

Q6: question not readable.