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 questions on chlorophyll, photosynthesis, nutrients, saprotrophs, and symbiosis 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: Easy to Moderate

Based On: NCERT Latest Syllabus (2026)

Introduction

Plants are the primary producers in nature because they can prepare their own food. Besides photosynthesis, some organisms depend on dead and decaying matter, while others survive through mutual cooperation with different organisms. This practice set covers more important NCERT concepts to strengthen your understanding of plant nutrition.

What You Will Learn

✔ Importance of chlorophyll

✔ Storage of food in plants

✔ Saprotrophic nutrition

✔ Symbiotic relationships

✔ Root nodules

✔ Essential conditions for photosynthesis

✔ Important NCERT-based concepts

Why This Topic Is Important

Nutrition in Plants is one of the most scoring chapters in Class 7 Science. A clear understanding of photosynthesis, saprotrophs, and symbiosis helps students answer conceptual questions confidently in school exams, Olympiads, and scholarship tests.

1. MCQ Questions with Detailed Solutions

Q1. In which form do plants commonly store their excess food?

A) Protein

B) Fat

C) Starch

D) Vitamins

Answer

C) Starch

Concept Behind This Question

Plants convert excess glucose into starch for storage.

Step-by-Step Solution

Plants prepare glucose during photosynthesis.

When glucose is not immediately needed, it is converted into starch and stored in different plant parts such as roots, stems, fruits, and seeds.

Therefore, the correct answer is C.

Exam Tip

Glucose = Prepared Food

Starch = Stored Food

Q2. Which organism obtains nutrition from dead and decaying organic matter?

A) Rose Plant

B) Mushroom

C) Mango Tree

D) Grass

Answer

B) Mushroom

Concept Behind This Question

Saprotrophs absorb nutrients from dead and decaying matter.

Step-by-Step Solution

Mushrooms do not prepare their own food.

They release digestive juices on dead organic matter and absorb the dissolved nutrients.

Hence, mushrooms are saprotrophs.

Therefore, the correct answer is B.

Exam Tip

Mushroom = Saprotroph

Q3. Root nodules are mainly found in the roots of:

A) Mango Plants

B) Rose Plants

C) Leguminous Plants

D) Coconut Trees

Answer

C) Leguminous Plants

Concept Behind This Question

Root nodules contain Rhizobium bacteria that fix atmospheric nitrogen.

Step-by-Step Solution

Leguminous plants such as pea, gram, and beans have root nodules.

These nodules contain Rhizobium bacteria that improve soil fertility by fixing nitrogen.

Therefore, the correct answer is C.

Exam Tip

Leguminous Plants → Root Nodules → Rhizobium

Q4. Which of the following is NOT a saprotroph?

A) Mushroom

B) Bread Mould

C) Yeast

D) Neem Tree

Answer

D) Neem Tree

Concept Behind This Question

Green plants prepare their own food and are not saprotrophs.

Step-by-Step Solution

Mushroom, bread mould, and yeast obtain nutrients from dead organic matter.

Neem tree contains chlorophyll and prepares its own food through photosynthesis.

Hence, Neem tree is not a saprotroph.

Therefore, the correct answer is D.

Exam Tip

Green plants are autotrophs, not saprotrophs.

Q5. Which factor provides the energy required for photosynthesis?

A) Wind

B) Sunlight

C) Rainwater

D) Soil

Answer

B) Sunlight

Concept Behind This Question

Sunlight supplies the energy needed to convert carbon dioxide and water into food.

Step-by-Step Solution

Photosynthesis cannot occur without sunlight because chlorophyll captures solar energy.

This energy is used to prepare glucose.

Therefore, the correct answer is B.

Exam Tip

Sunlight is the primary source of energy for photosynthesis.

Important Formulas & Concepts

1. Stored Food in Plants

Excess glucose is stored as starch.

2. Saprotrophic Nutrition

Nutrition obtained from dead and decaying organic matter.

Examples:

• Mushroom
• Bread Mould
• Yeast

3. Root Nodules

Small swellings on the roots of leguminous plants containing Rhizobium bacteria.

4. Energy for Photosynthesis

Sunlight provides the energy required for preparing food.

5. Autotrophs

Green plants prepare their own food using sunlight, carbon dioxide, and water.

Related Practice Questions

1. Why do plants store food as starch?
2. What is saprotrophic nutrition?
3. Name two saprotrophs.
4. Why are root nodules important?
5. What is the role of sunlight in photosynthesis?

Mini Quiz Challenge

Fill in the blanks

1. Excess glucose is stored as __________.
2. Mushroom is a __________.
3. The energy for photosynthesis comes from __________.

Answers

1. Starch
2. Saprotroph
3. Sunlight

Exam Tips

✔ Learn examples of saprotrophs.

✔ Remember the function of root nodules.

✔ Understand why plants store food as starch.

✔ Revise all NCERT definitions carefully.

✔ Practice conceptual MCQs regularly.

Quick Revision Notes

✔ Plants store food as starch.

✔ Mushroom is a saprotroph.

✔ Root nodules contain Rhizobium bacteria.

✔ Sunlight provides energy for photosynthesis.

✔ Leguminous plants improve soil fertility.

✔ Green plants are autotrophs.

✔ Starch is tested using iodine solution.

Common Mistakes Students Make

❌ Confusing glucose with starch.

❌ Thinking mushrooms prepare their own food.

❌ Forgetting the role of root nodules.

❌ Mixing autotrophs with saprotrophs.

❌ Assuming sunlight is a raw material instead of an energy source.

Key Takeaways

✔ Plants store excess food as starch.

✔ Mushroom is a saprotroph.

✔ Root nodules contain nitrogen-fixing bacteria.

✔ Sunlight is essential for photosynthesis.

✔ Leguminous plants enrich soil fertility.

✔ Green plants are autotrophs.

FAQs

1. Why do plants store food as starch?

Starch is an insoluble form of food that can be stored safely for future use.

2. What are saprotrophs?

Saprotrophs are organisms that obtain nutrients from dead and decaying organic matter.

3. Which bacteria are present in root nodules?

Rhizobium bacteria.

4. Why is sunlight necessary for photosynthesis?

Sunlight provides the energy needed to prepare food.

5. Give two examples of saprotrophs.

Mushroom and bread mould.

Conclusion

Plants not only prepare food through photosynthesis but also store it efficiently for future use. Concepts such as saprotrophic nutrition, root nodules, and the importance of sunlight are essential for understanding plant nutrition. Consistent practice of NCERT-based MCQs improves conceptual understanding and helps students score better in examinations.

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