The Question is from neet-botany respiration-in-plants rq, and it was created by the author K SURESH KUMAR

Question

If the RQ value is 0.9, the respiratory substrate is likely to be:

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: B
## CONCEPT FRAMEWORK
	**Primary Concept**: Respiratory Quotient (RQ)
	**Related Topics**: Metabolism, Cellular Respiration, Carbohydrates, Fats, Proteins
	**Prerequisites**: Understanding of chemical equations for respiration of different substrates.
## SOLUTION PATHWAY
**Given Information**:
	RQ value = 0.9
**Method & Steps**:
	1. **Recall the definition of RQ**: RQ is the ratio of the volume of carbon dioxide produced to the volume of oxygen consumed during respiration.
		Formula/Rule: $RQ = \frac{Volume\,of\,CO_2\,produced}{Volume\,of\,O_2\,consumed}$
	2. **Compare RQ values for different substrates**:
		Carbohydrates: RQ = 1.0
		Fats: RQ ≈ 0.7
		Proteins: RQ ≈ 0.8-0.9
		Organic Acids: RQ > 1.0
	3. **Analyze the given RQ value**: An RQ of 0.9 is closest to the typical range for protein metabolism.
		Result: Protein
		Verification: The given RQ of 0.9 falls within the expected range for protein (0.8-0.9).
## OPTION ANALYSIS
[A] Carbohydrate :x: Carbohydrates have an RQ of 1.0, significantly higher than the given RQ of 0.9.
[B] Protein ✓: Proteins have an RQ of approximately 0.8-0.9, which matches the given RQ.
[C] Fat :x: Fats have an RQ of approximately 0.7, considerably lower than the given RQ of 0.9.
[D] Organic Acid :x: Organic acids have an RQ greater than 1.0, much higher than the given RQ of 0.9.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing RQ values for different substrates:  Memorize the approximate RQ values for carbohydrates, fats, and proteins.
		2. Not considering the range for protein RQ: Remember that protein RQ isn't a fixed value but falls within a range.
	**Quick Tips**:
		1. Remember the order: Fat < Protein < Carbohydrate < Organic Acid (in terms of RQ values).
		2.  Associate '0.9' with 'Protein' as a close approximation.

K SURESH KUMAR · Answer

Carbohydrate

K SURESH KUMAR · Answer

The correct Option is "Protein"

K SURESH KUMAR · Answer

Fat

K SURESH KUMAR · Answer

Organic Acid

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