Photosynthesis in Higher Plants Practice Questions
NEET · Biology · 944 free MCQs with instant results and detailed explanations.
944
Total
201
Easy
413
Medium
330
Hard
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Topics in Photosynthesis in Higher Plants
Dark Reactions (Calvin Cycle)
196
Photorespiration
195
C4 Pathway
155
Factors Affecting Photosynthesis
176
Light Reactions
222
Sample Questions from Photosynthesis in Higher Plants
Here are 10 sample questions. Start a quiz to get randomized questions with scoring.
Q1
Easy
Which pigment is primarily responsible for capturing light energy in photosynthesis?
A.
Chlorophyll a
B.
Carotenoids
C.
Anthocyanins
D.
Xanthophylls
Show Answer & Explanation
Correct Answer: A
Chlorophyll a is the main pigment that captures light energy for photosynthesis, specifically in the light reactions.
Q2
Easy
What is the primary product of the light reactions of photosynthesis?
A.
Glucose
B.
ATP
C.
Oxygen
D.
NADPH
Show Answer & Explanation
Correct Answer: C
Oxygen is released as a byproduct during the light reactions when water molecules are split.
Q3
Easy
Which molecule acts as an electron carrier in the light reactions?
A.
NADP+
B.
ATP
C.
CO2
D.
RuBP
Show Answer & Explanation
Correct Answer: A
NADP+ accepts electrons and is reduced to NADPH during the light reactions, functioning as an electron carrier.
Q4
Medium
Which of the following components is primarily responsible for capturing light energy during the light reactions of photosynthesis?
A.
Chlorophyll
B.
Carotenoids
C.
Xanthophylls
D.
Phycobilins
Show Answer & Explanation
Correct Answer: A
Chlorophyll is the main pigment that absorbs light energy in the chloroplasts, initiating the photosynthetic process.
Q5
Medium
In the light reactions of photosynthesis, which process generates ATP?
A.
Photolysis
B.
Chemiosmosis
C.
Calvin Cycle
D.
Carbon fixation
Show Answer & Explanation
Correct Answer: B
Chemiosmosis occurs when protons flow through ATP synthase due to a proton gradient, resulting in ATP production.
Q6
Medium
What is the role of water in the light reactions of photosynthesis?
A.
Source of NADPH
B.
Electron donor
C.
Releases oxygen
D.
Both B and C
Show Answer & Explanation
Correct Answer: D
Water acts as an electron donor in photolysis and releases oxygen as a byproduct during the light reactions.
Q7
Medium
During the light reactions, which of the following occurs at the thylakoid membranes?
A.
Carbon fixation
B.
Production of glucose
C.
Photophosphorylation
D.
Synthesis of ribulose bisphosphate
Show Answer & Explanation
Correct Answer: C
Photophosphorylation occurs at the thylakoid membranes where ATP is synthesized from ADP and inorganic phosphate using light energy.
Q8
Hard
Which of the following statements about the light reactions of photosynthesis is true?
A.
Light energy is converted into chemical energy in the form of ATP and NADPH.
B.
Oxygen is consumed during the light reactions.
C.
Light reactions occur in the stroma of chloroplasts.
D.
Carbon dioxide is fixed during the light reactions.
Show Answer & Explanation
Correct Answer: A
The light reactions of photosynthesis convert light energy into chemical energy, producing ATP and NADPH, which are vital for the Calvin cycle. Oxygen is released, not consumed, and the reactions occur in the thylakoid membranes, not the stroma.
Q9
Hard
What is the primary function of photosystem II in the light reactions?
A.
To generate ATP through chemiosmosis.
B.
To split water molecules and release oxygen.
C.
To absorb light and transfer energy to photosystem I.
D.
To synthesize glucose directly from light energy.
Show Answer & Explanation
Correct Answer: B
Photosystem II primarily functions to absorb light energy, which facilitates the photolysis of water molecules to release oxygen, electrons, and protons, crucial for the continuation of the light reactions.
Q10
Hard
In the light reactions, which of the following is directly produced by the electron transport chain?
A.
NADPH
B.
ATP
C.
O2
D.
Glucose
Show Answer & Explanation
Correct Answer: B
ATP is directly produced by the electron transport chain during the light reactions via a process called photophosphorylation, where the proton gradient generated is utilized to convert ADP to ATP.
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Photosynthesis in Higher Plants — NEET Biology Practice Questions Online
This page contains 944 practice MCQs for the chapter Photosynthesis in Higher Plants in NEET Biology. The questions are organized by difficulty — 201 easy, 413 medium, 330 hard — so you can choose the right level for your preparation.
Every question includes a detailed explanation to help you understand the concept, not just memorize answers. Take a timed quiz to simulate exam conditions, or practice at your own pace with no time limit. This chapter covers 5 topics, giving you comprehensive coverage of the entire chapter.