Are these practice questions for Photosynthesis in Higher Plants based on the CBSE pattern?

Yes. Every practice question is modeled on the CBSE Class 11 - Science Biology exam pattern — including MCQs, assertion-reason questions, and short-answer formats that frequently appear in CBSE papers.

Are the practice questions for Photosynthesis in Higher Plants free?

Yes. Every chapter includes free practice questions for Class 11 - Science students to get you started.

What types of questions are included?

The practice set for Photosynthesis in Higher Plants mainly includes MCQs and CBSE-style short-answer questions, with instant feedback on each answer. For full-length textbook practice, use the NCERT Solutions page.

Are the practice questions suitable for board exam preparation?

Yes. The questions test the same concepts and depth that CBSE asks in board exams. After finishing, also solve the NCERT and NCERT Exemplar exercises for Photosynthesis in Higher Plants for full coverage.

How many practice questions are there for Photosynthesis in Higher Plants?

The number scales with chapter length and concept density. Each chapter typically has 15-50 practice questions across MCQ and short-answer formats.

Photosynthesis in Higher Plants Class 11 Biology Practice Questions with Answers

easy

Critique the experimental setup of Joseph Priestley. What was a major uncontrolled variable in his bell jar experiments?

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easy

Apply Blackman's Law of Limiting Factors to a scenario where a plant is provided with optimal light and temperature, but the atmospheric

CO_2

concentration is very low (e.g., 0.01%).

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easy

Justify the need for 12 molecules of water in the balanced equation for photosynthesis:

6\text{CO}_2 + 12\text{H}_2\text{O} \rightarrow \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{H}_2\text{O} + 6\text{O}_2

.

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easy

Define the process of photosynthesis.

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easy

Name the primary photosynthetic pigment in higher plants.

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easy

List the two main products of the light-dependent reactions that are utilized in the Calvin cycle.

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easy

Examine why the action spectrum of photosynthesis closely follows the absorption spectrum of chlorophylls, showing peaks in the blue and red regions of light.

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easy

Propose a reason why the reaction centre of a photosystem is composed of a single chlorophyll 'a' molecule, while the antennae complex has hundreds of pigment molecules.

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easy

Identify the specific location within the chloroplast where the light-dependent reactions occur.

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easy

Examine the primary functional significance of 'Kranz' anatomy in the leaves of C4 plants.

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easy

Formulate a hypothesis explaining why light saturation for photosynthesis occurs at only 10% of full sunlight.

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medium

Compare the primary roles of Photosystem I (PS I) and Photosystem II (PS II) during the light-dependent reactions of photosynthesis.

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medium

Explain Blackman's Law of Limiting Factors in the context of photosynthesis.

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medium

A C3 plant is supplied with water containing a heavy isotope of oxygen,

H_2^{18}O

, while the carbon dioxide provided is normal (

C^{16}O_2

). Analyze which of the products of photosynthesis (

C_6H_{12}O_6

or

O_2

) will contain the

^{18}O

isotope and provide a reason for your answer.

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medium

Examine the statement: 'The biosynthetic phase of photosynthesis is often called the dark reaction, but this is a misnomer.' Analyze the validity of this statement with supporting reasons.

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medium

Compare cyclic and non-cyclic photophosphorylation based on the photosystems involved, the final electron acceptor, and the net products.

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medium

What is 'Kranz' anatomy? Identify the type of plants in which it is found.

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medium

Evaluate the significance of the chemiosmotic hypothesis in explaining ATP synthesis during photophosphorylation. Why is a proton gradient essential for this process?

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medium

Design a simple experiment using a variegated leaf to demonstrate that both chlorophyll and light are necessary for photosynthesis. Outline the expected results and justify your conclusion.

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medium

A plant is exposed to light with wavelengths only beyond 680 nm. Evaluate which photosynthetic processes will continue and which will cease. Justify your reasoning based on the functions of PS I and PS II.

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medium

Recall the overall balanced chemical equation for photosynthesis.

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medium

Justify the assertion that cyclic photophosphorylation is a necessary supplement to non-cyclic photophosphorylation for the Calvin cycle to proceed.

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medium

Critique the term 'dark reaction' for the biosynthetic phase of photosynthesis. Propose a more accurate term and justify your proposal.

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medium

Name the primary

\text{CO}_2

acceptor molecule in the C3 pathway and the C4 pathway.

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medium

A scientist replicates T.W. Engelmann's experiment by illuminating a filament of the green alga Cladophora with light split by a prism and then introducing aerobic bacteria. Analyze where the bacteria would be expected to accumulate and explain what this result demonstrates about photosynthesis.

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medium

Contrast the initial carboxylation step in C3 and C4 plants by comparing the primary

CO_2

acceptor, the enzyme involved, the initial product, and the cellular location of the reaction.

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medium

List the four main types of pigments found in the leaves of higher plants and their characteristic colors in a chromatogram.

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medium

Contrast the location and function of the ATP synthase complex in a chloroplast with its counterpart in a mitochondrion.

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medium

Analyze the provided graph (Figure 11.10) showing the effect of light intensity on the rate of photosynthesis. If the plant is operating at point C, what would likely happen to the rate of photosynthesis if the

CO_2

concentration was doubled?

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medium

Explain the role of accessory pigments like chlorophyll b and carotenoids in photosynthesis.

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medium

Evaluate the role of RuBisCO's dual carboxylase and oxygenase activity. Why might this 'inefficient' oxygenase function have been conserved through evolution?

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medium

Apply the chemiosmotic hypothesis to explain why ATP synthesis would stop if a chemical agent made the thylakoid membrane fully permeable to protons (

H^+

).

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hard

Formulate a hypothesis to explain why

\text{C}_4

plants are more productive in tropical climates than

\text{C}_3

plants. Your hypothesis must integrate leaf anatomy, enzyme efficiency, and photorespiration.

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hard

A scientist proposes creating a genetically modified

\text{C}_3

plant that expresses high levels of PEP carboxylase in its mesophyll cells. Evaluate the potential benefits and drawbacks of this modification in terms of photosynthetic efficiency and biomass yield.

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hard

Describe the process of photorespiration and state why it is considered a wasteful process.

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hard

Summarize the chemiosmotic hypothesis for ATP synthesis during photophosphorylation.

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hard

Propose a strategy for a farmer to maximize the yield of greenhouse tomatoes (a

\text{C}_3

plant) by manipulating environmental factors. Justify each component of your strategy based on the principles of limiting factors in photosynthesis.

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hard

Describe the three main stages of the Calvin cycle.

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hard

Calculate the total number of ATP and NADPH molecules that are required by the Calvin cycle to produce one molecule of sucrose (

C_{12}H_{22}O_{11}

).

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hard

Analyze the consequences for a typical C3 plant if the enzyme RuBisCO were to lose its oxygenase activity, meaning it could only function as a carboxylase.

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hard

Solve for the net inputs and outputs of the Calvin cycle required for the synthesis of one molecule of triose phosphate (G3P).

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hard

Explain what is meant by the terms 'action spectrum' and 'absorption spectrum' in the context of photosynthesis.

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hard

Create a flowchart to illustrate how a

\text{C}_4

plant spatially separates the initial carbon fixation from the Calvin cycle. Justify why this separation minimizes photorespiration.

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hard

Summarize the key findings from Jan Ingenhousz's experiments on photosynthesis.

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hard

Design an experiment to prove that oxygen evolved during photosynthesis comes from water, not carbon dioxide, using radioisotope techniques. Justify the choice of isotopes.

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Photosynthesis in Higher PlantsClass 11 Biology Practice Questions