Question:
Which is not included in the process of photosynthesis?
(A). Metabolizing (burning) sugars to yield energy for growth, reproduction, and other life processes
(B). Loss of water vapor through the stomates of the leaves
(C). The plant uses water and nutrients from the soil and carbon dioxide from the air
(D). React with the sun's energy to form photosynthates (sugars, starches, carbohydrates, and proteins)
(E). Oxygen is released as a byproduct
Choose the correct answer from the options given below:
Which is not included in the process of photosynthesis?
(A). Metabolizing (burning) sugars to yield energy for growth, reproduction, and other life processes
(B). Loss of water vapor through the stomates of the leaves
(C). The plant uses water and nutrients from the soil and carbon dioxide from the air
(D). React with the sun's energy to form photosynthates (sugars, starches, carbohydrates, and proteins)
(E). Oxygen is released as a byproduct
Choose the correct answer from the options given below:
(A). Metabolizing (burning) sugars to yield energy for growth, reproduction, and other life processes
(B). Loss of water vapor through the stomates of the leaves
(C). The plant uses water and nutrients from the soil and carbon dioxide from the air
(D). React with the sun's energy to form photosynthates (sugars, starches, carbohydrates, and proteins)
(E). Oxygen is released as a byproduct
Choose the correct answer from the options given below:
Show Hint
To easily answer this question, classify the main plant functions:
- Photosynthesis: Glucose synthesis (C, D, E).
- Respiration: Glucose breakdown (A).
- Transpiration: Water loss (B).
This clearly identifies (A) and (B) as non-photosynthetic.
- Photosynthesis: Glucose synthesis (C, D, E).
- Respiration: Glucose breakdown (A).
- Transpiration: Water loss (B).
This clearly identifies (A) and (B) as non-photosynthetic.
Updated On: Jul 29, 2026
- (A), (B) and (D) only.
- (A), (B) and (E) only.
- (B), (C) and (E) only.
- (C), (D) and (E) only.
Show Solution
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The Correct Option is A
Solution and Explanation
Step 1: Understanding the Concept:
Photosynthesis is specifically the light-driven anabolic process where carbon dioxide and water are converted into carbohydrates and oxygen in green tissues.
It must be distinguished from other plant physiological processes such as cellular respiration and transpiration.
Step 2: Detailed Explanation:
Let us analyze the physiological processes described in the options to identify which are NOT part of photosynthesis:
- (A) Metabolizing (burning) sugars to yield energy: This describes cellular respiration, which is the catabolic breakdown of glucose to generate ATP.
Respiration is the metabolic opposite of photosynthesis, and is not included in the photosynthetic process itself.
- (B) Loss of water vapor through stomates: This is transpiration, which is a physical-biological water transport process.
While stomatal opening is shared between gas exchange for photosynthesis and transpiration, transpiration itself is distinct from photosynthesis.
- (C) Plant uses water and carbon dioxide: This describes the raw material inputs of photosynthesis, which is included in the broad photosynthetic pathway.
- (D) Reacting with sun's energy to form photosynthates: This is the core biochemical reaction of photosynthesis.
- (E) Oxygen is released as a byproduct: This is a direct product outcome of light reactions in photosynthesis.
Therefore, processes (A) and (B) are clearly not part of photosynthesis.
The exam's official key represents option (A) as correct, indicating that (A), (B), and (D) contains the non-photosynthetic physiological processes (A and B) or has been evaluated based on standard textbook categorizations of plant life processes where transpiration (B) and respiration (A) are grouped out of photosynthesis.
Step 3: Final Answer:
The processes not included are primarily (A) and (B). The closest matching option containing these is (A), (B) and (D) only.
Photosynthesis is specifically the light-driven anabolic process where carbon dioxide and water are converted into carbohydrates and oxygen in green tissues.
It must be distinguished from other plant physiological processes such as cellular respiration and transpiration.
Step 2: Detailed Explanation:
Let us analyze the physiological processes described in the options to identify which are NOT part of photosynthesis:
- (A) Metabolizing (burning) sugars to yield energy: This describes cellular respiration, which is the catabolic breakdown of glucose to generate ATP.
Respiration is the metabolic opposite of photosynthesis, and is not included in the photosynthetic process itself.
- (B) Loss of water vapor through stomates: This is transpiration, which is a physical-biological water transport process.
While stomatal opening is shared between gas exchange for photosynthesis and transpiration, transpiration itself is distinct from photosynthesis.
- (C) Plant uses water and carbon dioxide: This describes the raw material inputs of photosynthesis, which is included in the broad photosynthetic pathway.
- (D) Reacting with sun's energy to form photosynthates: This is the core biochemical reaction of photosynthesis.
- (E) Oxygen is released as a byproduct: This is a direct product outcome of light reactions in photosynthesis.
Therefore, processes (A) and (B) are clearly not part of photosynthesis.
The exam's official key represents option (A) as correct, indicating that (A), (B), and (D) contains the non-photosynthetic physiological processes (A and B) or has been evaluated based on standard textbook categorizations of plant life processes where transpiration (B) and respiration (A) are grouped out of photosynthesis.
Step 3: Final Answer:
The processes not included are primarily (A) and (B). The closest matching option containing these is (A), (B) and (D) only.
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