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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 MCQs on photosynthesis, chlorophyll, stomata, parasitic plants, and 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
Based On: NCERT Latest Syllabus (2026)
Introduction
Plants need food for growth, repair, and reproduction. Most plants prepare their own food through photosynthesis, while a few depend on other organisms for nutrition. Understanding these concepts helps students explain many natural processes and improves their problem-solving skills in Science examinations.
What You Will Learn
✔ Conditions necessary for photosynthesis
✔ Importance of chlorophyll
✔ Function of stomata
✔ Parasitic and insectivorous plants
✔ Essential nutrients
✔ NCERT-based application questions
✔ Exam-oriented concepts
Why This Topic Is Important
This chapter is the foundation of plant biology. It explains how plants prepare food, exchange gases, and obtain nutrients. Conceptual questions from this chapter are commonly asked in school exams, Olympiads, and scholarship examinations.
1. MCQ Questions with Detailed Solutions
Q1. Which part of the leaf contains most of the chlorophyll needed for photosynthesis?
A) Leaf veins
B) Green cells of the leaf
C) Leaf margin
D) Petiole
Answer
B) Green cells of the leaf
Concept Behind This Question
Chlorophyll is present in the chloroplasts of green leaf cells.
Step-by-Step Solution
The green colour of leaves is due to chlorophyll found inside chloroplasts.
These green cells absorb sunlight and prepare food.
Hence, the correct answer is B.
Exam Tip
Green leaf cells are the main site of photosynthesis.
Q2. If a plant does not receive sunlight for several days, what will happen to photosynthesis?
A) It will increase rapidly.
B) It will stop or become very slow.
C) It will produce more oxygen.
D) It will not be affected.
Answer
B) It will stop or become very slow.
Concept Behind This Question
Sunlight is essential for photosynthesis.
Step-by-Step Solution
Without sunlight, chlorophyll cannot capture solar energy.
As a result, plants cannot prepare sufficient food.
Therefore, photosynthesis stops or becomes very slow.
Hence, the correct answer is B.
Exam Tip
No sunlight = No effective photosynthesis.
Q3. Which of the following is a parasitic plant mentioned in NCERT?
A) Rose
B) Cuscuta
C) Pea
D) Wheat
Answer
B) Cuscuta
Concept Behind This Question
Cuscuta lacks chlorophyll and depends on host plants.
Step-by-Step Solution
Cuscuta cannot prepare its own food.
It absorbs nutrients from another living plant through special structures.
Therefore, it is a parasitic plant.
Hence, the correct answer is B.
Exam Tip
Cuscuta = Amarbel = Parasitic Plant
Q4. Which mineral helps plants make proteins and grow healthy leaves?
A) Nitrogen
B) Helium
C) Neon
D) Argon
Answer
A) Nitrogen
Concept Behind This Question
Nitrogen is essential for protein synthesis and plant growth.
Step-by-Step Solution
Plants use nitrogen to make proteins and other important compounds.
A deficiency of nitrogen results in poor growth and pale leaves.
Therefore, the correct answer is A.
Exam Tip
Nitrogen = Healthy leaves + Protein formation
Q5. Which statement about stomata is correct?
A) They absorb minerals from soil.
B) They prepare food directly.
C) They help in the exchange of gases.
D) They produce chlorophyll.
Answer
C) They help in the exchange of gases.
Concept Behind This Question
Stomata allow carbon dioxide to enter and oxygen to leave the leaf.
Step-by-Step Solution
Stomata are tiny pores present mainly on the lower surface of leaves.
They regulate the movement of gases required for photosynthesis and respiration.
Thus, the correct answer is C.
Exam Tip
Stomata = Gas Exchange + Water Vapour Loss
Important Formulas & Concepts
1. Chlorophyll
Green pigment that captures sunlight.
2. Green Cells
Contain chloroplasts where photosynthesis occurs.
3. Stomata
Tiny pores that help in gaseous exchange and transpiration.
4. Nitrogen
Essential mineral for protein formation and healthy plant growth.
5. Parasitic Plants
Plants that obtain food from a host plant.
Example: Cuscuta (Amarbel)
Related Practice Questions
- Why is sunlight essential for photosynthesis?
- What is the role of stomata?
- Why is Cuscuta called a parasitic plant?
- Which nutrient is important for protein synthesis?
- Where is chlorophyll found?
Mini Quiz Challenge
Fill in the blanks
- Stomata help in the exchange of __________.
- Cuscuta is a __________ plant.
- Chlorophyll is present inside the __________.
Answers
- Gases
- Parasitic
- Chloroplast
Exam Tips
✔ Learn the functions of stomata.
✔ Revise examples of parasitic plants.
✔ Remember the importance of nitrogen.
✔ Practice NCERT in-text questions.
✔ Focus on concept-based MCQs.
Quick Revision Notes
✔ Chlorophyll is present in green leaf cells.
✔ Sunlight is essential for photosynthesis.
✔ Stomata help in gaseous exchange.
✔ Cuscuta is a parasitic plant.
✔ Nitrogen helps in protein formation.
✔ Chloroplast is the site of photosynthesis.
✔ Green leaves are food factories.
Common Mistakes Students Make
❌ Thinking stomata absorb minerals.
❌ Confusing chlorophyll with chloroplast.
❌ Assuming all plants prepare their own food.
❌ Forgetting the role of nitrogen.
❌ Believing photosynthesis can occur without sunlight.
Key Takeaways
✔ Green cells contain chlorophyll.
✔ Photosynthesis requires sunlight.
✔ Stomata regulate gaseous exchange.
✔ Nitrogen supports plant growth.
✔ Cuscuta is a parasitic plant.
✔ Chloroplast is the site of photosynthesis.
FAQs
1. Why are green leaves important?
They contain chlorophyll and prepare food through photosynthesis.
2. What is the function of stomata?
Stomata allow the exchange of gases and help in transpiration.
3. Why can’t Cuscuta prepare its own food?
Because it lacks chlorophyll.
4. Why is nitrogen important for plants?
It helps in protein formation and healthy growth.
5. Can photosynthesis occur without sunlight?
No, sunlight is essential for photosynthesis.
Conclusion
Photosynthesis is one of the most important life processes on Earth. Understanding the roles of chlorophyll, stomata, nitrogen, and parasitic plants enables students to develop a strong conceptual foundation in Biology. Practising these NCERT-based MCQs regularly will improve confidence and exam performance.
Related links
- Class 7 English Chapter 1 The Rainbow part-2
- Class 7 Science Chapter 1 Nutrition in Plants part-3
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-4
- Class 7 Maths Chapter 3 Data Handling part-4
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-3
- Class 7 Science Chapter 1 Nutrition in Plants part-3
- Class 7 Maths Chapter 3 Data Handling part-3
- Class 7 English Chapter 1 The Rainbow part-1
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-2
- Class 7 Science Chapter 1 Nutrition in Plants part-2
- Class 7 Maths Chapter 3 Data Handling part-2
- Class 7 Science Chapter 1 Nutrition in Plants part-1
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