Hydrogen and oxygen release enormous amounts of energy when they react. Yet, hyd

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Question
Hydrogen and oxygen release enormous amounts of energy when they react. Yet, hydrogen and oxygen can be mixed together in a balloon and nothing will happen. Why?
Options
A. Competitive inhibitors are blocking the reaction from occurring in the active site
B. There must be contaminating elements in the balloon that prohibit the reaction from occurring
C. The energy of activation to form the transition-state complex is too high to allow the reaction to occur without assistance
D. all of the above

Correct Answer

Competitive inhibitors are blocking the reaction from occurring in the active site

1. The ability of a competitive inhibitor to bind to an active site in an allosterically controlled enzyme is __________ than the ability of a non-competitive inhibitor to bind to an active site in the same allosterically controlled enzyme.
Options
A. greater
B. lesser
C. approximately equal
D. half

2. Which of the following is the best evidence for the lock and key theory of enzyme action?
Options
A. Compounds similar in structure to the substrate inhibit enzyme activity
B. Enzymes are found in living organisms and speed up certain reactions
C. Enzymes speed up reactions by definite amounts
D. Enzymes determine the direction of a reaction

6. The ability of Vibrio fischeri to convert chemical energy directly into radiant energy in bioluminescence is an example of __________ at work.
Options
A. Shelford's law of tolerance
B. Leibig's law of the minimum
C. the first law of thermodynamics
D. the third law of thermodynamics

8. The fact that ?-oxidation of fatty acids, occurs in the mitochondria whereas fatty acid synthesis occurs in the cytoplasmic matrix, is an example of regulation of enzymatic activity by the __________ mechanism.
Options
A. compartmentation
B. induction
C. competitive inhibition
D. repression

9. Anthranilate synthase, the first enzyme of tryptophan biosynthesis after the branch point shows feedback inhibition and repression due to
Options
A. L-tryptophan
B. D-L-tryptophan hydantoin
C. L-serine
D. pyruvate

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