Enzyme Reaction(Microbiology ) Questions and Answers
Question 1. 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
Explanation:-
Answer: Option C. -> the first law of thermodynamics
Question 2. The ability of FADH to be oxidized is __________ than the ability of FAD to be oxidized.
greater
approximately equal
half
lesser
Explanation:-
Answer: Option A. -> greater
Question 3. Reduction is the
gain of protons
gain of electron
loss of proton
loss of electron
Explanation:-
Answer: Option B. -> gain of electron
Question 4. 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.
approximately equal
greater
lesser
half
Explanation:-
Answer: Option B. -> greater
Question 5. An endergonic reaction is one that
requires energy in order to proceed
gives off much heat
looses energy
releases energy for work
Explanation:-
Answer: Option A. -> requires energy in order to proceed
Question 6. If the free energy change (ΔG) in a reaction is a negative value, it indicates that the
reaction absorbs energy
reaction releases energy
reaction is in negative direction
reaction is in positive direction
Explanation:-
Answer: Option B. -> reaction releases energy
Question 7. To a living organism, which of the following has the greatest amount of available energy per molecule?
ADP
AMP
H2O
ATP
Explanation:-
Answer: Option D. -> ATP
Question 8. An exergonic reaction is one that
releases energy for work
gives off much heat
requires energy to proceed
looses energy
Explanation:-
Answer: Option A. -> releases energy for work
Question 9. If the Keq for an enzymatic reaction is greater than 1, the reaction
both (a) and (b)
can not occur without the input of energy
will be endergonic
none of these
Explanation:-
Answer: Option D. -> none of these
Question 10. Which of the following is the best evidence for the lock and key theory of enzyme action?
Enzymes determine the direction of a reaction
Compounds similar in structure to the substrate inhibit enzyme activity
Enzymes speed up reactions by definite amounts
Enzymes are found in living organisms and speed up certain reactions
Explanation:-
Answer: Option B. -> Compounds similar in structure to the substrate inhibit enzyme activity