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NEET Exam  >  NEET Test  >  Biology Class 11  >  Test: Photosynthesis in Higher Plants - 1 - NEET MCQ

Photosynthesis in Higher Plants - 1 - NEET Biology Class 11 Free MCQ Test


MCQ Practice Test & Solutions: Test: Photosynthesis in Higher Plants - 1 (20 Questions)

You can prepare effectively for NEET Biology Class 11 with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Photosynthesis in Higher Plants - 1". These 20 questions have been designed by the experts with the latest curriculum of NEET 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 20 minutes
  • - Number of Questions: 20

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Test: Photosynthesis in Higher Plants - 1 - Question 1
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Consider the following statements and choose the correct answer.

a. Photochemical phase occurs inside the thylakoids, especially those of grana region.
b. Biosynthetic phase reactions occur in stroma or matrix of chloroplasts and are dependent upon light.

Detailed Solution: Question 1

This is the correct option as statement 'b' is false. The photochemical phase (light reaction) occurs inside the thylakoid membranes, especially in the grana region, where light energy is used to produce ATP and NADPH. The biosynthetic phase (dark reaction) occurs in the stroma of chloroplasts and does not require light directly but depends on ATP and NADPH produced during the light reaction.

Topic in NCERT: Light reactions and dark reactions in photosynthesis

Line in NCERT: "The former set of reactions, since they are directly light driven are called light reactions (photochemical reactions). The latter are not directly light driven but are dependent on the products of light reactions (ATP and NADPH)."

Test: Photosynthesis in Higher Plants - 1 - Question 2
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In cells, ATP is synthesized in:

Detailed Solution: Question 2

ATP is synthesized in mitochondria during respiration and in chloroplasts during photosynthesis. This process is called phosphorylation. It can be oxidative phosphorylation (in mitochondria) or photophosphorylation (in chloroplasts).

Topic in NCERT: PHOTOSYNTHESIS IN HIGHER PLANTS

Line in NCERT: "ATP is synthesised by cells (in mitochondria and chloroplasts) is named phosphorylation."

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Test: Photosynthesis in Higher Plants - 1 - Question 3
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Which of the following stages of calvin cycle are in CORRECT order?

Detailed Solution: Question 3

The Calvin cycle proceeds in three stages: carboxylation (CO2 fixation by RuBisCO to form 3-PGA), reduction (conversion of 3-PGA into triose phosphate using ATP and NADPH), and regeneration (of RuBP to continue the cycle). The cycle operates in a cyclic manner in the stroma of chloroplasts.

Topic in NCERT: The Calvin Cycle

Line in NCERT: "For ease of understanding, the Calvin cycle can be described under three stages: carboxylation, reduction and regeneration."

Test: Photosynthesis in Higher Plants - 1 - Question 4
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Photorespiration does NOT occur in:

Detailed Solution: Question 4

  • In the photorespiratory pathway, there is no synthesis of ATP or NADPH. Therefore, photorespiration is a wasteful process.
  • In C4 plants photorespiration does not occur. This is because they have a mechanism that increases the concentration of CO2 at the enzyme site.

Topic in NCERT: PHOTORESPIREATION

Line in NCERT: "In C₄ plants photorespiration does not occur."

Test: Photosynthesis in Higher Plants - 1 - Question 5
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What did Jan Ingenhousz's experiments reveal about the role of sunlight in plant processes?

Detailed Solution: Question 5

Jan Ingenhousz's experiments with an aquatic plant showed that in bright sunlight, small bubbles containing oxygen were formed around the green parts of the plant, while in the dark, they did not. This demonstrated that sunlight is essential for the process by which plants release oxygen.

Topic in NCERT: PHOTOSYNTHESIS IN HIGHER PLANTS

Line in NCERT: "Using a similar setup as the one used by Priestley, but by placing it once in the dark and once in the sunlight, Jan Ingenhousz showed that sunlight is essential to the plant process that somehow purifies the air fouled by burning candles or breathing animals."

Test: Photosynthesis in Higher Plants - 1 - Question 6
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Calvin cycle is discovered by:

Detailed Solution: Question 6

The work of Melvin Calvin is the discovery that the first CO2 fixation product was a 3-carbon organic acid. He also contributed to working out the complete biosynthetic pathway; hence it was called the Calvin cycle.

Image result for c3 cycle

Topic in NCERT: Melvin Calvin

Line in NCERT: "the work of Melvin Calvin is exemplary. The use of radioactive 14C by him in algal photosynthesis studies led to the discovery that the first CO₂ fixation product was a 3-carbon organic acid. He also contributed to working out the complete biosynthetic pathway; hence it was called Calvin cycle after him."

Test: Photosynthesis in Higher Plants - 1 - Question 7
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In sugarcane, CO2 is fixed in malic acid with the help of enzyme:

Detailed Solution: Question 7

In C4 plants such as sugarcane, the enzyme phosphoenolpyruvate carboxylase (PEP carboxylase) fixes CO2 to form oxaloacetic acid (OAA), which is then converted into malic acid. This primary fixation occurs in the mesophyll cells before the Calvin cycle operates in the bundle sheath cells.

Test: Photosynthesis in Higher Plants - 1 - Question 8
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Dark fixation of CO2 in CAM plants is called ossification because it produces:

Detailed Solution: Question 8

In CAM plants, dark fixation of CO2 occurs at night through the enzyme PEP carboxylase, producing oxaloacetic acid, which is then reduced to malic acid. This process helps minimize water loss by keeping stomata open at night and closed during the day.

Topic in NCERT: C4 PATHWAY

Line in NCERT: "the C acid OAA is formed in the mesophyll cells. It then forms other 4-carbon compounds like malic acid or aspartic acid in the mesophyll cells itself."

Test: Photosynthesis in Higher Plants - 1 - Question 9
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The substances that have an ability to absorb light at different specific wavelength are:

Detailed Solution: Question 9

Pigments are substances that absorb light at specific wavelengths. In photosynthesis, chlorophyll a is the primary pigment, while others like chlorophyll b, xanthophylls, and carotenoids act as accessory pigments to capture additional wavelengths of light.

Topic in NCERT: Roles various pigments play in photosynthesis

Line in NCERT: "Pigments are substances that have an ability to absorb light, at specific wavelengths."

Test: Photosynthesis in Higher Plants - 1 - Question 10
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On excitation, the electrons picked up by an electron acceptor is passed to:

Detailed Solution: Question 10

When electrons in chlorophyll molecules absorb light energy, they become excited and are transferred to an electron acceptor. The acceptor then passes these electrons through an electron transport chain consisting of cytochromes, which help in ATP and NADPH formation.

Topic in NCERT: THE ELECTRON TRANSPORT

Line in NCERT: "These electrons are picked up by an electron acceptor which passes them to an electrons transport system consisting of cytochromes."

Test: Photosynthesis in Higher Plants - 1 - Question 11
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Which one has Kranz anatomy?

Detailed Solution: Question 11

In the leaves of C4 plants such as maize, sorghum we can observe the Kranz anatomy.

Topic in NCERT: C4 Pathway

Line in NCERT: "The particularly large cells around the vascular bundles of the C plants are called bundle sheath cells, and the leaves which have such anatomy are said to have ‘Kranz' anatomy."

Test: Photosynthesis in Higher Plants - 1 - Question 12
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The law of limiting factors is given by:

Detailed Solution: Question 12

When several factors affect any [bio] chemical process, Blackman’s (1905) Law of Limiting Factors comes into effect.

  • According to this law, If a chemical process is affected by more than one factor, then its rate will be determined by the factor which is nearest to its minimal value: it is the factor that directly affects the process if its quantity is changed.

Test: Photosynthesis in Higher Plants - 1 - Question 13
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The splitting of water molecule takes place inside:

Detailed Solution: Question 13

Splitting of water takes place near PS II, located in the inner side of the thylakoid membrane.

Splitting of water releases oxygen in the atmosphere and generates a proton gradient across the thylakoid membrane.

Topic in NCERT: PHOTOSYNTHESIS IN HIGHER PLANTS

Line in NCERT: "Since splitting of the water molecule takes place on the inner side of the membrane, the protons or hydrogen ions that are produced by the splitting of water accumulate within the lumen of the thylakoids."

Test: Photosynthesis in Higher Plants - 1 - Question 14
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In PSI, the reaction centre the chlorophyll 'a' has an absorption peak at:

Detailed Solution: Question 14

  • Photosystems are the protein complexes involved in photosynthesis. Each photosystem is characterized by the wavelength of light to which its reaction centre is most reactive.
  • Photosystem I, reaction centre pigment chlorophyll-a has absorption peak at 700nm.
  • Thus Photosystem I is also known as P700​

So, the correct answer is 700 nm.

Topic in NCERT: PHOTOSYNTHESIS IN HIGHER PLANTS

Line in NCERT: "In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm, hence is called P700, while in PS II it has absorption maxima at 680 nm, and is called P680."

Test: Photosynthesis in Higher Plants - 1 - Question 15
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Light reaction otherwise called as:

Detailed Solution: Question 15

Light reactions or the ‘Photochemical’ phase include light absorption, water splitting, oxygen release, and the formation of high-energy chemical intermediates, ATP and NADPH. Several complexes are involved in the process.

Topic in NCERT: Light reactions or the ‘Photochemical' phase

Line in NCERT: "Light reactions or the ‘Photochemical' phase include light absorption, water splitting, oxygen release, and the formation of high-energy chemical intermediates, ATP and NADPH."

Test: Photosynthesis in Higher Plants - 1 - Question 16
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The C4 pathway is otherwise called as:

Detailed Solution: Question 16

The presence of the bundle sheath would help you identify the C4 plants. This pathway that has been named the Hatch and Slack Pathway, is again a cyclic process.

Topic in NCERT: Hatch and Slack Pathway

Line in NCERT: "The pathway that has been named the Hatch and Slack Pathway, is again a cyclic process."

Test: Photosynthesis in Higher Plants - 1 - Question 17
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PGA as the first CO2 fixation product was discovered in photosynthesis of:

Detailed Solution: Question 17

Melvin Calvin and his colleagues discovered the Calvin cycle by tracing radioactive 14C in algal photosynthesis. They found that the first stable CO₂ fixation product was 3-phosphoglyceric acid (PGA), a 3-carbon compound, indicating a C₃ pathway.

Topic in NCERT: MELVIN CALVIN

Line in NCERT: "The use of radioactive 14C by him in algal photosynthesis studies led to the discovery that the first CO2 fixation product was a 3-carbon organic acid."

Test: Photosynthesis in Higher Plants - 1 - Question 18
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The splitting of water molecules is associated with:

Detailed Solution: Question 18

  • The other pathway, non-cyclic photophosphorylation, is a two-stage process involving two different chlorophyll photosystems. Being a light reaction, non-cyclic photophosphorylation occurs in the thylakoid membrane. First, a water molecule is broken down into 2H+ + 1/2 O2 + 2e− by a process called photolysis (or light-splitting).
  • The two electrons from the water molecule are kept in photosystem II, while the 2H+and 1/2O2 are left out for further use. Then a photon is absorbed by chlorophyll pigments surrounding the reaction core centre of the photosystem.
  • The light excites the electrons of each pigment, causing a chain reaction that eventually transfers energy to the core of photosystem II, exciting the two electrons that are transferred to the primary electron acceptor, phaeophytin.

Topic in NCERT: Splitting of Water

Line in NCERT: "The splitting of water molecules is associated with PS II; water is split into 2H+, [O] and electrons."

Test: Photosynthesis in Higher Plants - 1 - Question 19
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Carbon dioxide is fixed in:

Detailed Solution: Question 19

Carbon dioxide fixation occurs during the dark reaction (Calvin cycle) of photosynthesis in the stroma of chloroplasts. It uses ATP and NADPH produced in the light reaction to reduce CO2 into carbohydrates (CH2O).
Dark Reactions of Photosynthesis

Topic in NCERT: Photosynthesis

Line in NCERT: "CO2 is combined with H2O to produce (CH2O) or sugars."

Test: Photosynthesis in Higher Plants - 1 - Question 20
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Blackman's law is related to 

Detailed Solution: Question 20

Blackman formulated the principle of limiting factors. He studied the effect of CO2 concentration, light intensity and temperature on the rate of photosynthesis.

Topic in NCERT: FACTORS AFFECTING PHOTOSYNTHESIS

Line in NCERT: "When several factors affect any [bio] chemical process, Blackman's (1905) Law of Limiting Factors comes into effect."

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This test contains 20 MCQs on Photosynthesis in Higher Plants - 1 with detailed solutions for each question. It is part of the Biology Class 11 course on EduRev, designed to align with the current NEET syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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