434
MCQ Questions
40
Assertion-Reason
106
NEET 2025 Pattern
39
Previous Year Q
NCERT Mapping
Photosynthesis in higher plants is from NCERT Class 11 Biology, Chapter 11, under the unit Plant Physiology. This chapter carries approximately 3% weightage in NEET, based on analysis of the last 10 years of question papers. MedicNEET covers this chapter with 580 questions — every question built from line-by-line NCERT analysis.
Topics in Photosynthesis in higher plants
The electron transport
what do we know?
Where does photosynthesis take place?
How mant types of pigments are involved in photosynthesis??
What is Light Reaction?
Where are the ATP and NADPH used?
Photorespiration
Early experiments
The C4 pathway
Factors affecting photosynthesis
Sample Questions — Photosynthesis in higher plants
Try 5 free questions below. Get all 580 in the MedicNEET app.
MCQ
Which two products of the light reaction are essential for the Calvin cycle?
✅ Correct Answer: C
These products fuel the biochemical reactions of the Calvin cycle.
MCQ
Which of the following statements is/are true regarding CO₂ as a factor?
I. It is an external factor
II. It can limit photosynthesis even under high light
III. Its optimum concentration varies for C₃ and C₄ plants
IV. It is never limiting in aquatic plants
✅ Correct Answer: B
CO₂ is an external, limiting factor, and C₄ plants have a higher optimum.
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MCQ
Why is the Calvin cycle considered a biosynthetic pathway?
✅ Correct Answer: D
It is an anabolic process that converts inorganic carbon into organic sugars.
Assertion-Reason
Assertion (A): Grana lamellae and stroma lamellae contain different photosystem components.
Reason (R): Stroma lamellae membranes have both PS I and PS II while grana lamellae lack PS II and NADP reductase enzyme.
✅ Correct Answer: C
NCERT confirms grana and stroma lamellae have different photosystem components (Assertion true). However, NCERT states “While the membrane or lamellae of the grana have both PS I and PS II the stroma lamellae membranes lack PS II as well as NADP reductase enzyme” - the Reason swaps the photosystem distribution (false). This tests understanding of photosystem location within chloroplast membranes.
NEET 2025 Pattern
Which of the following statements about RuBisCO and photorespiration are NOT correct?
S1: RuBisCO's active site can bind to both CO2 and O2, with competitive binding determining the outcome.
S2: It shows a much greater affinity for O2 when CO2:O2 ratio is nearly equal.
S3: In C3 plants, photorespiration initiated by O2 binding to RuBisCO leads to the release of CO2 and utilisation of ATP, but no sugar synthesis.
S4: In C4 plants, RuBisCO is concentrated in the mesophyll cells, where it primarily fixes CO2 from C4 acids.
S5: The C4 pathway acts to minimize photorespiration by ensuring high CO2 concentration at the site of RuBisCO activity in bundle sheath cells.
✅ Correct Answer: B
Let's evaluate each statement to identify the incorrect ones:
S1: RuBisCO is known for its dual nature, binding to both CO2 and O2, and this binding is competitive. This statement is correct.
S2: RuBisCO has a much greater affinity for CO2 when the CO2:O2 ratio is nearly equal, not for O2. This statement is incorrect.
S3: In C3 plants, O2 binding to RuBisCO initiates photorespiration, a process that consumes ATP and releases CO2 without synthesizing sugars. This statement is correct.
S4: In C4 plants, RuBisCO is abundant in the bundle sheath cells, while the mesophyll cells lack RuBisCO and instead have PEPcase for initial CO2 fixation. This statement is incorrect.
S5: The C4 pathway effectively concentrates CO2 in the bundle sheath cells, thereby minimizing RuBisCO's oxygenase activity and reducing photorespiration. This statement is correct.
Therefore, statements S2 and S4 are NOT correct.
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Frequently Asked Questions
How many Photosynthesis in higher plants questions does MedicNEET have?
MedicNEET has 580 questions for Photosynthesis in higher plants, including 434 MCQs, 40 Assertion-Reason questions, and 106 NEET 2025-style long-form questions.
What is the NEET weightage of Photosynthesis in higher plants?
Photosynthesis in higher plants carries approximately 3% weightage in NEET, based on analysis of the last 10 years of papers. It falls under the Plant Physiology unit of Class 11 Biology.
Are Photosynthesis in higher plants questions NCERT-based?
Yes, all MedicNEET Photosynthesis in higher plants questions are built from line-by-line analysis of NCERT Class 11 textbook. Every question maps to specific NCERT pages and concepts.