Ch6 Adaptive Quiz: Enzymes 6.1-6.2

Question 1

Which study first suggested the presence of biological catalysts in the 1700s?

Answer 1

stomach secretions effect on the digestion of meat

Question 2

A reaction with a _____ generates more product than substrate at equilibrium.

Answer 2

large, negative ΔG′°

Question 3

Which statement is true regarding coenzymes?

Answer 3

Most coenzymes derive from dietary precursors and transfer specific functional groups.

Question 4

Compared to an uncatalyzed reaction, what does an enzyme change?

Answer 4

the rate of the reaction

Question 5

Which pairing correctly matches the enzyme class with the type of reaction it catalyzes?

Answer 5

oxidoreductase: transfer of electrons

Question 6

Enzymes increase reaction rates in the range of 5 to 17 orders of magnitude. Which statement does NOT explain how enzymes achieve these enormous and highly selective rate enhancements?

Answer 6

Noncovalent interactions increase the standard free-energy change.

Question 7

Which statement is false regarding coenzymes?

Answer 7

Riboflavin is a coenzyme. (it is not)

Question 8

Which factor does NOT represent a barrier that prevents a reaction from taking place?

Answer 8

standard free-energy change

Question 9

Which cellular component is a common coenzyme?

Answer 9

flavin adenine dinucleotide

Question 10

If the ground state of a reaction’s product is lower than the ground state of the substrate, which statement is true?

Answer 10

The reaction is exothermic, and there is more product than reactant at equilibrium.