Question:
The process whereby adjustments are made to structure and function of the photosynthetic apparatus in response to change in growth irradiance is called
The process whereby adjustments are made to structure and function of the photosynthetic apparatus in response to change in growth irradiance is called
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Acclimation is a phenotypic adjustment of an organism to its environmental conditions.
When light is the driving factor, this acclimation of the chloroplast and leaf morphology is specifically termed "photo-acclimation".
When light is the driving factor, this acclimation of the chloroplast and leaf morphology is specifically termed "photo-acclimation".
Updated On: Jul 6, 2026
- Denaturation
- Transition temperature
- Photo-acclimation
- Photorespiration
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Plants are sessile organisms and must adapt to variations in light intensity (irradiance) in their growth environment.
They dynamically modify their photosynthetic machinery to maximize light harvesting under low light and avoid photodamage under excess light.
Step 3: Detailed Explanation:
- Photo-acclimation (C): The physiological and phenotypic adjustment of the structure and function of the photosynthetic apparatus (including thylakoid membrane composition, pigment concentration, and electron transport capacity) in response to changes in light intensity over time.
- Denaturation (A): The structural disruption of proteins due to extreme stress (such as high heat or pH), which is irreversible and damaging.
- Transition temperature (B): The temperature at which cell membranes undergo a phase transition from a liquid-crystalline to a solid-gel state.
- Photorespiration (D): A metabolic pathway (C2 cycle) that occurs when rubisco oxygenates RuBP under high \(O_2\) and low \(CO_2\) conditions.
Step 4: Final Answer:
The physiological adjustment process is known as Photo-acclimation, corresponding to option (C).
Plants are sessile organisms and must adapt to variations in light intensity (irradiance) in their growth environment.
They dynamically modify their photosynthetic machinery to maximize light harvesting under low light and avoid photodamage under excess light.
Step 3: Detailed Explanation:
- Photo-acclimation (C): The physiological and phenotypic adjustment of the structure and function of the photosynthetic apparatus (including thylakoid membrane composition, pigment concentration, and electron transport capacity) in response to changes in light intensity over time.
- Denaturation (A): The structural disruption of proteins due to extreme stress (such as high heat or pH), which is irreversible and damaging.
- Transition temperature (B): The temperature at which cell membranes undergo a phase transition from a liquid-crystalline to a solid-gel state.
- Photorespiration (D): A metabolic pathway (C2 cycle) that occurs when rubisco oxygenates RuBP under high \(O_2\) and low \(CO_2\) conditions.
Step 4: Final Answer:
The physiological adjustment process is known as Photo-acclimation, corresponding to option (C).
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