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NEET Exam  >  NEET Test  >  Biology Class 11  >  Test: Respiratory Substrates & Respiratory Quotient - NEET MCQ

Respiratory Substrates & Quotient - Free MCQ Practice Test with solutions,


MCQ Practice Test & Solutions: Test: Respiratory Substrates & 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 Substrates & 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

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Test: Respiratory Substrates & Respiratory Quotient - Question 1
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Respiratory substrates are the organic substances which are ________ during respiration to liberate energy.

Detailed Solution: Question 1

Respiration is an oxidative process in which repiratory substrates are oxidised to liberate energy inside the living cells. The common respiratory substrates are carbohydrates, proteins, fats and organic acids. The most common respiratory substrates are carbohydrates, proteins, fats and organic acids. The most common respiratory substrate is glucose.

Topic in NCERT: Respiratory substrates

Line in NCERT: "the compounds that are oxidised during this process are known as respiratory substrates."

Test: Respiratory Substrates & Respiratory Quotient - Question 2
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RQ in anaerobic respiration is?

Detailed Solution: Question 2

In anaerobic respiration, there is no consumption of oxygen and carbon dioxide is produced in most of the cases. Therefore, respiratory quotient is infinity. Carb the usual substarte.

Topic in NCERT: Respiratory quotient

Line in NCERT: "the ratio of the volume of co2 evolved to the volume of o2 consumed in respiration is called the respiratory quotient (rq) or respiratory ratio."

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Test: Respiratory Substrates & Respiratory Quotient - Question 3
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Refer the given equation.

2(C51​H98​O6​) + 145O2​ → 102CO2​ + 98H2​O + Energy

The RQ in this case is

Detailed Solution: Question 3

When facts are used in respiration, the RQ is less than 1, e.g. for the breakdown of tripalmitin,

Topic in NCERT: Respiratory quotient

Line in NCERT: "when carbohydrates are used as substrate and are completely oxidised, the rq will be 1, because equal amounts of co2 and o2 are evolved and consumed, respectively, as shown in the equation below :"

Test: Respiratory Substrates & Respiratory Quotient - Question 4
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Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate?

Detailed Solution: Question 4

The correct option is 2 i.e., conversion of Succinyl coA to Succinic acid.
During the conversion of succinyl-CoA to succinic acid a molecule of GTP is synthesised. This is a substrate level phosphorylation.
The other 3 steps involve oxidation-reduction reaction where NAD+ is reduced to NADH + H+ and one point where FAD+ is reduced to FADH2.

Topic in NCERT: Citric acid cycle

Line in NCERT: "during the conversion of succinyl-coa to succinic acid a molecule of gtp is synthesised. this is a substrate level phosphorylation."

Test: Respiratory Substrates & Respiratory Quotient - Question 5
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The value of respiratory Quotient actually depends upon

Detailed Solution: Question 5

The correct answer is: (a) The type of respiratory substrate used

The Respiratory Quotient (RQ) is the ratio of the volume of carbon dioxide (CO₂) produced to the volume of oxygen (O₂) consumed during respiration. Its value depends primarily on the type of respiratory substrate being metabolized:

  • Carbohydrates: RQ = 1 (equal amounts of O₂ consumed and CO₂ produced).
  • Fats: RQ < 1 (more O₂ consumed than CO₂ produced).
  • Proteins: RQ ≈ 0.8 (less O₂ consumed than CO₂ produced).

Other factors, such as location or ventilation, do not directly determine the RQ.

Topic in NCERT: Respiratory quotient

Line in NCERT: "the respiratory quotient depends upon the type of respiratory substrate used during respiration."

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About this NEET Practice Test

This test contains 5 MCQs on Respiratory Substrates & Respiratory Quotient with detailed solutions for each question. It is part of the Biology Class 11 course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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If you found this Respiratory Substrates & Respiratory Quotient MCQ Test helpful, you can further enhance your NEET preparation with in-depth courses on EduRev, for all the subjects and topics available in Biology Class 11 course. The course offers:
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  • MCQ Test: variety of questions as per the pattern of NEET exam
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