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Test: Respiratory Substrates & Respiratory Quotient - NEET MCQ


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10 Questions MCQ Test Biology Class 11 - Test: Respiratory Substrates & Respiratory Quotient

Test: Respiratory Substrates & Respiratory Quotient for NEET 2024 is part of Biology Class 11 preparation. The Test: Respiratory Substrates & Respiratory Quotient questions and answers have been prepared according to the NEET exam syllabus.The Test: Respiratory Substrates & Respiratory Quotient MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Respiratory Substrates & Respiratory Quotient below.
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Test: Respiratory Substrates & Respiratory Quotient - Question 1

Respiratory substrates are the organic substances which are ________ during respiration to liberate energy.

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - 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.

Test: Respiratory Substrates & Respiratory Quotient - Question 2

Respiratory quotient may be represented as

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 2

During aerobic respiration O2 is consumed and CO2 is released. The ratio of the volume of CO2 evolved to the volume of O2 consumed in respiration over a period of time is called as respiratory quotient (RQ) or respiratory ratio.

The respiratory quotient depends upon the type of respiratory substrate used during respiration.

(i) When carbohydrates are used as substrate and are completely oxidized the RQ will be 1, because equal amounts of CO2 and O2 are evolved and consumed respectively.

(ii) When proteins are respiratory substrates, the ratio would be about 0.9.

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Test: Respiratory Substrates & Respiratory Quotient - Question 3

If the volume of CO2​ liberated during respiration is more than the volume of O2​ used the respiratory substances will be

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 3

RQ slightly more than unity is found when organic acids are broken down as respiratory substrates under aerobic conditions, e.g., for breakdown of oxalic acid,

Test: Respiratory Substrates & Respiratory Quotient - Question 4

Value of R.Q. in succulents is _________.

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 4

Succulents do not evolve carbon dioxide during the night (when their stomata are open) as the same is in carbon fixation. They also change carbohydrates to organic acids which utilise oxygen but do not evolve carbon dioxide.

Test: Respiratory Substrates & Respiratory Quotient - Question 5

RQ in anaerobic respiration is?

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 5

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.

Test: Respiratory Substrates & Respiratory Quotient - Question 6

Instantaneous source of energy is _______.

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 6

Glucose is a monomer that after ingestion, does not gets digested and directly gets absorbed and converted into energy. Therefore, glucose is an instantaneous source of energy.
Protein, fats, and nucleic acid don't get directly converted into energy. So, they are not the instantaneous source of energy. 

Test: Respiratory Substrates & Respiratory Quotient - Question 7

Refer the given equation.

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

The RQ in this case is

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 7

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

Test: Respiratory Substrates & Respiratory Quotient - Question 8

Respirometer is an instrument used to measure

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 8

Respirometer is an instrument used for measuring rate of respiration and respiratory quotient.

Test: Respiratory Substrates & Respiratory Quotient - Question 9

Complete the following biochemical equation of respiration and select the correct answer.

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 9

Aerobic respiration is a chemical reaction in which glucose gets oxidise and converted into carbon dioxide and water. The following is the balanced chemical reaction -
C6H12O6 ​+ 6O2 ​→ 6CO2 ​+ 6H2O + Energy.

Test: Respiratory Substrates & Respiratory Quotient - Question 10

Identify the step in tricarboxylic acid cycle, which does not involve oxidation of substrate?

Detailed Solution for Test: Respiratory Substrates & Respiratory Quotient - Question 10

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.

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