biology : class11 Gross ATP Production : Location, Steps, Products, ATP Yield : Glycolysis MCQ Questions and Answers
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Gross ATP Production
MCQ questions and answers.
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MCQ Questions
1. How many ATP molecules are produced in total during glycolysis before subtracting the ATP used?
A.
2 ATP
B.
4 ATP
C.
6 ATP
D.
8 ATP
Correct Answer:
4 ATP
Explanation:
Glycolysis produces a gross total of 4 ATP molecules before accounting for the 2 ATP molecules consumed during its early steps.
2. What does gross ATP production in glycolysis refer to?
A.
ATP used during glycolysis
B.
Total ATP formed during glycolysis
C.
ATP remaining after glycolysis
D.
ATP formed only during the first step
Correct Answer:
Total ATP formed during glycolysis
Explanation:
Gross ATP production means the total number of ATP molecules formed in glycolysis, which is 4 ATP per glucose molecule.
3. During glycolysis, how many ATP molecules are formed by substrate-level phosphorylation in total?
A.
1 ATP
B.
2 ATP
C.
4 ATP
D.
8 ATP
Correct Answer:
4 ATP
Explanation:
The substrate-level phosphorylation reactions of glycolysis form 4 ATP molecules in total, giving the gross ATP production.
4. If one glucose molecule undergoes glycolysis, what is its gross ATP production?
A.
1 ATP
B.
2 ATP
C.
4 ATP
D.
6 ATP
Correct Answer:
4 ATP
Explanation:
Each glucose molecule produces a gross total of 4 ATP molecules during glycolysis.
5. Which value represents the gross ATP yield of glycolysis per glucose molecule?
A.
0 ATP
B.
2 ATP
C.
4 ATP
D.
36 ATP
Correct Answer:
4 ATP
Explanation:
The gross ATP yield is 4 ATP per glucose molecule. The value of 2 ATP represents the net yield, not the gross yield.
6. In glycolysis, 4 ATP molecules are formed, while 2 ATP molecules are used. What is the gross ATP production?
A.
2 ATP
B.
4 ATP
C.
6 ATP
D.
8 ATP
Correct Answer:
4 ATP
Explanation:
Gross production counts all ATP molecules formed, so it is 4 ATP, regardless of the ATP molecules used earlier.
7. How many ATP molecules are generated in the ATP-forming reactions of glycolysis before considering the energy investment phase?
A.
2 ATP
B.
3 ATP
C.
4 ATP
D.
5 ATP
Correct Answer:
4 ATP
Explanation:
The ATP-forming reactions generate 4 ATP molecules in total, which is the gross ATP production of glycolysis.
8. Which statement about gross ATP production in glycolysis is correct?
A.
It is 2 ATP per glucose molecule.
B.
It is 4 ATP per glucose molecule.
C.
It is 6 ATP per glucose molecule.
D.
It is 8 ATP per glucose molecule.
Correct Answer:
It is 4 ATP per glucose molecule.
Explanation:
Glycolysis forms 4 ATP molecules in total from one glucose molecule, so its gross ATP production is 4 ATP.
9. If two glucose molecules undergo glycolysis, what is the total gross ATP production?
A.
2 ATP
B.
4 ATP
C.
8 ATP
D.
12 ATP
Correct Answer:
8 ATP
Explanation:
One glucose molecule gives a gross production of 4 ATP. Therefore, two glucose molecules produce 8 ATP gross.
10. The gross ATP production of glycolysis is greater than the net ATP production because:
A.
some ATP is used in the early steps
B.
ATP is produced only outside the cell
C.
oxygen destroys some ATP
D.
glucose produces no ATP directly
Correct Answer:
some ATP is used in the early steps
Explanation:
Glycolysis forms 4 ATP but uses 2 ATP during its early energy-investment steps, making the gross production higher than the net production.
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