NEET Exam > NEET Test > Biology Class 11 > Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient - NEET MCQ

Respiratory Balance Sheet, Amphibolic Pathway & Quotient - Free MCQ Practice

MCQ Practice Test & Solutions: Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient (5 Questions)

You can prepare effectively for NEET Biology Class 11 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient". These 5 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

- Format: Multiple Choice Questions (MCQ)
- Duration: 5 minutes
- Number of Questions: 5

Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient - Question 1

The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of

A.
Nucleic acids
B.
ATP in small stepwise units
C.
ATP in one large oxidation reaction
D.
Sugars

Detailed Solution: Question 1

The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of ATP step-wise. The three processes are involved in cellular respiration of food to produce energy, which will be used for various cellular activities.

Topic in NCERT: Electron transport system (ets)

Line in NCERT: "the metabolic pathway through which the electron passes from one carrier to another, is called the electron transport system (ets) and it is present in the inner mitochondrial membrane."

Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient - Question 2

When fats are the respiratory substrate, the value of RQ would be

A.
Approx. 0.7
B.
Approx. 1.0
C.
More than 1.0
D.
None of the above

Detailed Solution: Question 2

The respiratory quotient (RQ) is used in calculations of basal metabolic rate (BMR). It is the ratio of the volume of carbon dioxide produced by the body to the volume of oxygen consumed by the body in respiration over a period of time. It depends on the type of respiratory substrate used during respiration. RQ of fat is about 0.7. RQ of carbohydrate is 1. RQ of organic acids is above 1. RQ of protein is 0.9. RQ value gives information about the source of energy an animal is using.
Thus, the correct answer is option A.

Topic in NCERT: Respiratory quotient

Line in NCERT: "when fats are used in respiration, the rq is less than 1."

Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient - Question 3

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates, and proteins?

A. Glucose-6-phosphate
B. Fructose 1,6-bisphosphate
C. Pyruvic acid
D. Acetyl Co-A

Detailed Solution: Question 3

Acetyl Co-A is a key molecule that plays a central role in the catabolism of carbohydrates, fats, and proteins. It serves as a convergence point in the metabolic pathways of these macronutrients, entering the citric acid cycle where it undergoes further breakdown to produce energy. This makes it a common component in the respiration-mediated breakdown of all three types of biomolecules.

Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient - Question 4

Why is the theoretical calculation of ATP gain from one molecule of glucose considered only an approximation in real cellular conditions?

A. Because the ATP yield varies depending on the cell type.
B. Because different substrates can alter the pathway's efficiency.
C. Because all pathways work simultaneously and substrates and ATP needs fluctuate dynamically.
D. Because the ATP calculation is based solely on fermentation and not on aerobic respiration.

Detailed Solution: Question 4

The theoretical calculation of ATP yield from glucose metabolism assumes an orderly and sequential pathway without interruption, where intermediates are not diverted for other syntheses, and where only glucose contributes as a substrate. However, in real cellular conditions, metabolic pathways do not operate in isolation; they are interconnected with substrates entering and leaving as needed, and ATP is utilized dynamically based on cellular demands. This makes the theoretical ATP yield an approximation rather than an exact measure.

Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient - Question 5

What is a major difference between fermentation and aerobic respiration regarding ATP production?

A.
Fermentation produces more ATP than aerobic respiration.
B.
Fermentation fully oxidizes glucose to CO2 and H2O, while aerobic respiration does not.
C.
Aerobic respiration results in a higher yield of ATP per glucose molecule than fermentation.
D.
NADH is oxidized more rapidly in fermentation than in aerobic respiration.

Detailed Solution: Question 5

c) Aerobic respiration results in a higher yield of ATP per glucose molecule than fermentation.

Explanation

Fermentation:
- Occurs in the absence of oxygen.
- Glucose is only partially broken down (e.g., into ethanol + CO₂ in yeast, or lactic acid in muscles).
- Produces only 2 ATP per glucose (through glycolysis).
Aerobic respiration:
- Requires oxygen.
- Glucose is fully oxidized into CO₂ and H₂O.
- Produces a much higher yield of ATP — about 36–38 ATP per glucose in eukaryotic cells.

So the major difference is the amount of ATP produced: aerobic respiration is far more efficient.

Respiratory Balance Sheet, Amphibolic Pathway & Quotient - Free MCQ Practice

MCQ Practice Test & Solutions: Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient (5 Questions)

The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of

When fats are the respiratory substrate, the value of RQ would be

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates, and proteins?

Why is the theoretical calculation of ATP gain from one molecule of glucose considered only an approximation in real cellular conditions?

What is a major difference between fermentation and aerobic respiration regarding ATP production?

Explanation

Biology Class 11

Biology Class 11

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Respiratory Balance Sheet, Amphibolic Pathway & Quotient - Free MCQ Practice

MCQ Practice Test & Solutions: Test: Respiratory Balance Sheet, Amphibolic Pathway & Respiratory Quotient (5 Questions)

The overall goal of glycolysis, Krebs cycle and electron transport system is the formation of

When fats are the respiratory substrate, the value of RQ would be​

Which of the following biomolecules is common to respiration-mediated breakdown of fats, carbohydrates, and proteins?

Why is the theoretical calculation of ATP gain from one molecule of glucose considered only an approximation in real cellular conditions?

What is a major difference between fermentation and aerobic respiration regarding ATP production?

Explanation

Biology Class 11

Biology Class 11

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About this NEET Practice Test

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When fats are the respiratory substrate, the value of RQ would be