ENZYME REACTION QUIZ

Reduction is the

loss of proton

gain of electron

loss of electron

gain of protons

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YOUR ANSWER : ?

The fact that β-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.

induction

competitive inhibition

repression

compartmentation

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YOUR ANSWER : ?

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?

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

The energy of activation to form the transition-state complex is too high to allow the reaction to occur without assistance

All of these

There must be contaminating elements in the balloon that prohibit the reaction from occurring

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YOUR ANSWER : ?

Adenosine triphosphate is a type of

amino acid

steroid

nucleotide

fatty acid

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YOUR ANSWER : ?

An exergonic reaction is one that

requires energy to proceed

gives off much heat

looses energy

releases energy for work

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YOUR ANSWER : ?

Oxidation is the

gain of electron

loss of electron

loss of proton

gain of protons

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YOUR ANSWER : ?

An endergonic reaction is one that

requires energy in order to proceed

gives off much heat

looses energy

releases energy for work

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YOUR ANSWER : ?

Which of the following is the best evidence for the lock and key theory of enzyme action?

Enzymes are found in living organisms and speed up certain reactions

Enzymes determine the direction of a reaction

Compounds similar in structure to the substrate inhibit enzyme activity

Enzymes speed up reactions by definite amounts

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YOUR ANSWER : ?

In the reaction, C6H12O6+ 6O2 → 6CO2 + 6H2O + energy, which component is being oxidized?

O2

H2O

CO2

C6H12O6

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YOUR ANSWER : ?

The ability of Vibrio fischeri to convert chemical energy directly into radiant energy in bioluminescence is an example of __________ at work.

the third law of thermodynamics

Leibig's law of the minimum

Shelford's law of tolerance

the first law of thermodynamics

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YOUR ANSWER : ?