Class 7 Science Chapter 1 Nutrition in Plants

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Practice Class 7 Science Chapter 1 Nutrition in Plants MCQ Questions with Answers based on the latest NCERT syllabus. Solve important revision-based MCQs on photosynthesis, autotrophic nutrition, chlorophyll, symbiosis, and plant nutrients with detailed solutions for CBSE, State Board, Olympiad, and scholarship exam preparation.

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Chapter Information

Subject: Science

Class: 7

Chapter: Nutrition in Plants

Question Type: Multiple Choice Questions (MCQs)

Difficulty Level: Moderate to Difficult

Based On: NCERT Latest Syllabus (2026)

Introduction

This final practice set provides a comprehensive revision of the important concepts covered in Chapter 1 – Nutrition in Plants. The questions are designed to test conceptual understanding rather than memorization, helping students prepare effectively for school examinations, Olympiads, and scholarship tests.

What You Will Learn

✔ Complete revision of photosynthesis

✔ Autotrophic and heterotrophic nutrition

✔ Importance of chlorophyll and stomata

✔ Nitrogen fixation

✔ Symbiotic nutrition

✔ NCERT concept-based practice

✔ Exam-oriented revision

Why This Topic Is Important

Nutrition in Plants is the foundation of Biology. Understanding how plants prepare food and obtain nutrients helps students understand food chains, ecosystems, and advanced biological concepts taught in higher classes. This chapter carries significant weight in school exams and competitive examinations.

1. MCQ Questions with Detailed Solutions

Q1. Which of the following combinations is essential for preparing food in green plants?

A) Sunlight, Chlorophyll, Carbon Dioxide, and Water

B) Oxygen, Nitrogen, Water, and Heat

C) Minerals, Oxygen, Water, and Soil

D) Nitrogen, Sunlight, Soil, and Oxygen

Answer

A) Sunlight, Chlorophyll, Carbon Dioxide, and Water

Concept Behind This Question

Photosynthesis requires four essential conditions.

Step-by-Step Solution

Green plants prepare food only when all these are available:

• Sunlight
• Chlorophyll
• Carbon dioxide
• Water

Without any one of these, photosynthesis cannot occur effectively.

Therefore, the correct answer is A.

Exam Tip

Remember the four essentials of photosynthesis.

Q2. Which organism prepares its own food but also benefits another organism in a symbiotic relationship?

A) Alga in a lichen

B) Cuscuta

C) Mushroom

D) Pitcher Plant

Answer

A) Alga in a lichen

Concept Behind This Question

The alga performs photosynthesis and shares food with the fungus.

Step-by-Step Solution

In a lichen:

• The alga prepares food.
• The fungus receives food and provides shelter, water, and minerals.

Thus, both organisms benefit.

Therefore, the correct answer is A.

Exam Tip

Lichen = Mutual Benefit

Q3. Which statement correctly explains the importance of chlorophyll?

A) It absorbs minerals from soil.

B) It absorbs sunlight needed for photosynthesis.

C) It fixes atmospheric nitrogen.

D) It transports glucose.

Answer

B) It absorbs sunlight needed for photosynthesis.

Concept Behind This Question

Chlorophyll is the green pigment responsible for capturing solar energy.

Step-by-Step Solution

Photosynthesis requires energy from sunlight.

Chlorophyll absorbs this sunlight and converts it into usable energy for food preparation.

Therefore, the correct answer is B.

Exam Tip

Chlorophyll = Solar Energy Absorber

Q4. Which of the following plants depends completely on another living plant for food?

A) Mango

B) Rose

C) Cuscuta

D) Pea

Answer

C) Cuscuta

Concept Behind This Question

Cuscuta lacks chlorophyll and depends on a host plant for nutrition.

Step-by-Step Solution

Since Cuscuta cannot perform photosynthesis, it absorbs food from a living host through special structures.

Hence, it is a parasitic plant.

Therefore, the correct answer is C.

Exam Tip

Cuscuta = Parasitic Plant

Q5. Why is photosynthesis considered one of the most important biological processes?

A) It produces only water.

B) It provides food and releases oxygen.

C) It absorbs all oxygen from the atmosphere.

D) It produces only carbon dioxide.

Answer

B) It provides food and releases oxygen.

Concept Behind This Question

Photosynthesis supports almost all life on Earth.

Step-by-Step Solution

During photosynthesis:

• Plants prepare glucose (food).
• Oxygen is released into the atmosphere.

Food supports living organisms, while oxygen is essential for respiration.

Therefore, the correct answer is B.

Exam Tip

Photosynthesis = Food + Oxygen

Important Formulas & Concepts

1. Essential Requirements for Photosynthesis

• Sunlight
• Chlorophyll
• Carbon Dioxide
• Water

2. Autotroph

An organism that prepares its own food.

Examples:

• Mango
• Neem
• Sunflower

3. Parasitic Plant

Depends on a living host for food.

Example: Cuscuta

4. Symbiosis

Both organisms benefit by living together.

Example: Lichen (Alga + Fungus)

5. Nitrogen Fixation

Rhizobium bacteria convert atmospheric nitrogen into usable compounds.

Related Practice Questions

1. List the four essential conditions required for photosynthesis.
2. Explain the relationship between algae and fungi in lichens.
3. Why is Cuscuta called a parasitic plant?
4. What is the role of chlorophyll?
5. Why is photosynthesis important for life on Earth?

Mini Quiz Challenge

Fill in the blanks

1. Chlorophyll absorbs __________.
2. Cuscuta is a __________ plant.
3. Photosynthesis releases __________.

Answers

1. Sunlight
2. Parasitic
3. Oxygen

Exam Tips

✔ Memorize the essential conditions for photosynthesis.

✔ Revise examples of autotrophs, parasites, and symbiosis.

✔ Practice NCERT in-text questions.

✔ Focus on reasoning-based questions.

✔ Understand concepts instead of rote learning.

Quick Revision Notes

✔ Green plants are autotrophs.

✔ Photosynthesis prepares glucose.

✔ Chlorophyll absorbs sunlight.

✔ Carbon dioxide enters through stomata.

✔ Cuscuta is a parasite.

✔ Lichens show symbiosis.

✔ Rhizobium fixes atmospheric nitrogen.

✔ Oxygen is released during photosynthesis.

Common Mistakes Students Make

❌ Confusing chlorophyll with chloroplast.

❌ Thinking oxygen is required as a raw material for photosynthesis.

❌ Assuming insectivorous plants obtain all their food from insects.

❌ Forgetting the role of Rhizobium bacteria.

❌ Mixing parasitic nutrition with symbiotic nutrition.

Key Takeaways

✔ Photosynthesis requires sunlight, chlorophyll, water, and carbon dioxide.

✔ Green plants are autotrophs.

✔ Chlorophyll captures sunlight.

✔ Cuscuta is a parasitic plant.

✔ Lichens are examples of symbiosis.

✔ Rhizobium bacteria fix atmospheric nitrogen.

✔ Photosynthesis provides food and oxygen.

FAQs

1. What are the essential requirements for photosynthesis?

Sunlight, chlorophyll, carbon dioxide, and water.

2. What is an autotroph?

An organism that prepares its own food through photosynthesis.

3. Why is Cuscuta called a parasite?

Because it depends on a living host plant for food.

4. What is the function of chlorophyll?

It absorbs sunlight needed for photosynthesis.

5. Why is photosynthesis important?

It produces food and releases oxygen, making life on Earth possible.

Conclusion With this final practice set, students have revised all the major concepts of Class 7 Science Chapter 1 – Nutrition in Plants. Regular practice of these 15 MCQ sets will strengthen conceptual understanding, improve problem-solving skills, and build confidence for school exams, Olympiads, and scholarship tests. Consistent revision of NCERT concepts is the key to scoring excellent marks in Science

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