Respiratory Quotient and Metabolism

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Questions and Answers

What is the Respiratory Quotient (RQ) for carbohydrates?

2
0.5
0.7
1 (correct)

What is the RQ value for aerobic respiration using fats?

0.9
0.7 (correct)
1
0.4

What happens to the RQ value during anaerobic respiration?

0 (correct)
0.5
2
1

For proteins, what is the approximate RQ value derived from the given formula?

<p>1.04 (A)</p> Signup and view all the answers

What does a variable RQ indicate about organic acids?

<p>It depends on the specific value of 'n'. (D)</p> Signup and view all the answers

Flashcards

Respiratory Quotient (RQ)

Ratio of carbon dioxide produced to oxygen consumed during metabolism.

RQ of Carbohydrates

1.0; equal amounts of CO2 and O2.

RQ for Fats

~0.7; less CO2 produced per O2 consumed.

RQ in Anaerobic Respiration

Undefined or 0; no O2 consumed.

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RQ Importance

Indicates the fuel source (e.g., carbohydrates, fats) used by the body during respiration.

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Study Notes

Respiratory Quotient (RQ)

RQ is calculated as: RQ = Volume of CO₂ evolved / Volume of O₂ consumed
CO₂ - Produced
O₂ - Consumed

Carbohydrate Respiration

C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O
RQ = 6CO₂ / 6O₂ = 1

Anaerobic Respiration

C₆H₁₂O₆ + ZERO → 2C₂H₅OH + 2CO₂
RQ = 2CO₂ / ZERO = α

Fats

Fats (Tripalmitin) → C₅₅H₁₁₀O₆ + 78O₂ → 102 CO₂ + 98H₂O
RQ = 102/78 ≈ 1.3

Proteins (Albumin)

C₇₂H₁₁₂N₁₈O₂₂S + 77O₂ → 63CO₂ + 77H₂O + 67H₂O
RQ = 63/77 ≈ 0.82

Organic Acids

C_nH_2nO₂ + O₂ → nCO₂ + nH₂O
RQ = n/n = 1

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Description

This quiz covers the concept of Respiratory Quotient (RQ) and its application to different types of respiration including carbohydrate, anaerobic, fats, proteins, and organic acids. Test your knowledge on how RQ values differ across these metabolic processes.