ENZYME REACTION QUIZ

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?

All of these

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

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

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

TRUE ANSWER : ?
YOUR ANSWER : ?

Adenosine triphosphate is a type of

fatty acid

steroid

nucleotide

amino acid

TRUE ANSWER : ?
YOUR ANSWER : ?

To a living organism, which of the following has the greatest amount of available energy per molecule?

H2O

AMP

ADP

ATP

TRUE ANSWER : ?
YOUR ANSWER : ?

An enzyme that is always produced, regardless of the presence of substrates or the end products, is called

an allosteric enzyme

a constitutive enzyme

a repressible enzyme

an isoenzyme

TRUE ANSWER : ?
YOUR ANSWER : ?

The affinity of an enzyme for its substrate, when the enzyme has a Km of 0.50 M will be __________ than the affinity of an enzyme for its substrate when the enzyme has a Km of 0.05 M.

greater

lesser

half

approximately equal

TRUE ANSWER : ?
YOUR ANSWER : ?

Oxidation is the

gain of electron

loss of proton

loss of electron

gain of protons

TRUE ANSWER : ?
YOUR ANSWER : ?

Reduction is the

loss of electron

gain of electron

loss of proton

gain of protons

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Shelford's law of tolerance

the third law of thermodynamics

the first law of thermodynamics

Leibig's law of the minimum

TRUE ANSWER : ?
YOUR ANSWER : ?

Anthranilate synthase, the first enzyme of tryptophan biosynthesis after the branch point shows feedback inhibition and repression due to

pyruvate

L-tryptophan

D-L-tryptophan hydantoin

L-serine

TRUE ANSWER : ?
YOUR ANSWER : ?

An endergonic reaction is one that

gives off much heat

releases energy for work

requires energy in order to proceed

looses energy

TRUE ANSWER : ?
YOUR ANSWER : ?

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