NEET Biology: Site of photosynthesis Practice Questions
12 free multiple-choice questions on Site of photosynthesis (Plant Physiology) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. Where are the thylakoids, the membrane-bound structures necessary for light reactions, located inside the chloroplast?
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Correct answer: A — In the grana stacks
Thylakoids are flattened sacs located within the chloroplast, often stacked into grana, where the light-dependent reactions occur.
Q2. Photosynthesis requires the absorption of light energy. Which cells in the plant tissue are optimally positioned to intercept the maximum amount of incoming sunlight?
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Correct answer: D — Palisade mesophyll cells
Palisade mesophyll cells are positioned directly against the upper surface of the leaf to maximize the capture of incident sunlight, making them highly efficient light absorbers.
Q3. Photosynthesis is fundamentally dependent on the presence of which pigment located inside the chloroplasts?
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Correct answer: D — Chlorophyll
Chlorophyll is the green pigment essential for capturing light energy and initiating the entire process of photosynthesis.
Q4. The site of photosynthesis involves the action of which two main stages?
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Correct answer: A — Light reaction and Dark reaction
Photosynthesis comprises two main stages: the light-dependent reactions and the light-independent reactions (Calvin cycle).
Q5. Where does the process of photosynthesis primarily take place in a plant?
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Correct answer: C — Leaves
Photosynthesis occurs mainly in the leaves because they contain the necessary chlorophyll and are equipped with stomata for gas exchange.
Q6. The fluid-filled space within the chloroplast, where the light-independent reactions occur, is known as the:
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Correct answer: B — Stroma
The stroma is the dense fluid matrix of the chloroplast where the Calvin cycle (light-independent reactions) takes place.
Q7. Which type of mesophyll cell is primarily responsible for the efficient absorption of light energy in the leaf?
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Correct answer: D — Palisade mesophyll cells
Palisade mesophyll cells are tightly packed and positioned directly beneath the upper epidermis, optimizing their surface area for maximum light interception and absorption.
Q8. Which of the following components within the plant cell is the primary location where the light-dependent reactions of photosynthesis take place?
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Correct answer: C — Chloroplasts
The light-dependent reactions, which capture light energy, occur within the thylakoid membranes inside the chloroplasts.
Q9. In a typical dicot leaf, which type of mesophyll cell is primarily responsible for photosynthesis, forming the bulk of the photosynthetic activity?
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Correct answer: A — Palisade mesophyll cells
Palisade mesophyll cells are packed with chloroplasts and are located directly beneath the upper epidermis, making them the primary site for photosynthesis in leaves.
Q10. In a typical plant leaf, which layer of mesophyll cells is primarily responsible for maximizing the absorption of sunlight?
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Correct answer: D — Palisade mesophyll
The palisade mesophyll cells are tightly packed and located just beneath the upper epidermis, optimizing the capture of incident light for photosynthesis.
Q11. The overall site of photosynthesis in a plant leaf is determined by the presence of which organelle?
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Correct answer: B — Chloroplasts
Chloroplasts contain the chlorophyll necessary to capture light energy and carry out the entire process of photosynthesis.
Q12. Which specialized tissue in the leaf is primarily responsible for carrying out photosynthesis?
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Correct answer: D — Mesophyll
The mesophyll tissue, consisting of palisade and spongy parenchyma cells, is located just beneath the epidermis and is where the majority of photosynthetic activity takes place.
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