The Question is from neet-botany photosynthesis-in-higher-plants factors-affect-photosynthesis, and it was created by the author K SURESH KUMAR

Question

I. Temperature
II. $C{O_2}$ concentration
III. Chlorophyll arrangement
IV. Water
Among the given factors, identify the external factors that affects the rate of photosynthesis and correct option accordingly

K SURESH KUMAR · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Photosynthesis and Affecting Factors
	**Related Topics**: Plant Physiology, Environmental Factors
	**Prerequisites**: Understanding of photosynthesis process
## SOLUTION PATHWAY
**Given Information**:
	Factors potentially affecting photosynthesis: Temperature, $CO_2$ concentration, Chlorophyll arrangement, and Water.
**Method & Steps**:
	1. **Identify External Factors**:  External factors are those that are environmental and not inherent to the plant itself.
		Reasoning: We need to differentiate between factors the plant can control (internal) and those it cannot (external).
	2. **Analyze each factor**:
		* **Temperature (I):** External factor. Photosynthesis is a temperature-dependent enzymatic process.
		* **$CO_2$ Concentration (II):** External factor.  $CO_2$ is a reactant in photosynthesis and its availability influences the rate.
		* **Chlorophyll arrangement (III):** Internal factor. The arrangement of chlorophyll within chloroplasts is genetically determined and not directly influenced by the external environment.
		* **Water (IV):** External factor. Water is a crucial reactant in photosynthesis and its availability affects the rate.
	3. **Combine External Factors**: The external factors are I, II, and IV.
		Result: The correct option is I, II, and IV.
## OPTION ANALYSIS
[A] ✓: 'I, II and IV' - Correct. These are the external factors influencing photosynthesis.
[B] :x: 'I, II and III' - Incorrect. Chlorophyll arrangement (III) is an internal factor.
[C] :x: 'II, III and IV' - Incorrect. Chlorophyll arrangement (III) is an internal factor.
[D] :x: 'I, III and IV' - Incorrect. Chlorophyll arrangement (III) is an internal factor.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing internal and external factors: Remember to focus on what the plant can control versus what the environment dictates.
	**Quick Tips**:
		1. Think of the basic needs of a plant for photosynthesis: light, water, and $CO_2$. These are primarily external factors.
		2. Remember that temperature influences enzyme activity, which is crucial for photosynthesis.

K SURESH KUMAR · Answer

The correct Option is "I, II and IV"

K SURESH KUMAR · Answer

I, II and III

K SURESH KUMAR · Answer

II, III and IV

K SURESH KUMAR · Answer

I, III and IV

NEET Botany Photosynthesis in Higher Plants Factors Affect Photosynthesis MCQs

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