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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 application-based MCQs on photosynthesis, chlorophyll, stomata, parasites, and plant nutrition 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
Green plants are called producers because they prepare their own food using sunlight, carbon dioxide, and water. Besides understanding photosynthesis, students should also know how different environmental conditions affect food preparation in plants. This practice set focuses on concept-based and application-oriented questions from the NCERT syllabus.
What You Will Learn
✔ Factors affecting photosynthesis
✔ Importance of chlorophyll
✔ Gas exchange in plants
✔ Food storage in plants
✔ Plant nutrition concepts
✔ Application-based NCERT questions
✔ Exam-oriented practice
Why This Topic Is Important
This chapter forms the basis of plant physiology and helps students understand how plants survive and support life on Earth. Questions based on experiments, concepts, and real-life situations are frequently asked in school examinations, Olympiads, and scholarship tests.
1. MCQ Questions with Detailed Solutions
Q1. A plant is kept in a completely dark room for several days. Which process will be most affected?
A) Seed dispersal
B) Photosynthesis
C) Pollination
D) Germination
Answer
B) Photosynthesis
Concept Behind This Question
Photosynthesis requires sunlight to prepare food.
Step-by-Step Solution
In the absence of sunlight, chlorophyll cannot absorb light energy.
As a result, the plant cannot prepare food efficiently.
Therefore, photosynthesis is the process that is most affected.
Hence, the correct answer is B.
Exam Tip
Sunlight is essential for photosynthesis.
Q2. Which of the following is the correct sequence of food preparation in plants?
A) Sunlight → Chlorophyll absorbs light → Photosynthesis → Glucose formation
B) Water → Oxygen → Sunlight → Glucose
C) Chlorophyll → Roots → Fruit → Food
D) Carbon Dioxide → Seed → Flower → Glucose
Answer
A) Sunlight → Chlorophyll absorbs light → Photosynthesis → Glucose formation
Concept Behind This Question
Photosynthesis follows a specific sequence involving sunlight and chlorophyll.
Step-by-Step Solution
First, chlorophyll absorbs sunlight.
The absorbed energy is used during photosynthesis.
Finally, glucose is prepared as food.
Therefore, the correct answer is A.
Exam Tip
Remember the order:
Sunlight → Chlorophyll → Photosynthesis → Food
Q3. Which structure mainly regulates the entry of carbon dioxide into a leaf?
A) Root hairs
B) Stomata
C) Flowers
D) Fruits
Answer
B) Stomata
Concept Behind This Question
Stomata are tiny pores that allow gases to move in and out of leaves.
Step-by-Step Solution
Carbon dioxide enters the leaf through stomata.
The gas is then used in photosynthesis.
Therefore, the correct answer is B.
Exam Tip
Stomata = Entry of CO₂ + Exit of O₂
Q4. Which statement is true about chlorophyll?
A) It absorbs minerals from soil.
B) It traps sunlight for photosynthesis.
C) It fixes nitrogen.
D) It transports water.
Answer
B) It traps sunlight for photosynthesis.
Concept Behind This Question
Chlorophyll is the green pigment that captures solar energy.
Step-by-Step Solution
Chlorophyll absorbs sunlight.
The captured energy is used to prepare food during photosynthesis.
Hence, the correct answer is B.
Exam Tip
Chlorophyll = Sunlight Absorber
Q5. Which of the following is an example of heterotrophic nutrition in plants?
A) Mango
B) Wheat
C) Cuscuta
D) Banyan
Answer
C) Cuscuta
Concept Behind This Question
Heterotrophic plants depend on other organisms for food.
Step-by-Step Solution
Cuscuta lacks chlorophyll.
It cannot prepare its own food.
It obtains nutrients from a host plant.
Therefore, the correct answer is C.
Exam Tip
Cuscuta = Heterotrophic + Parasitic Plant
Important Formulas & Concepts
1. Conditions for Photosynthesis
- Sunlight
- Chlorophyll
- Carbon Dioxide
- Water
2. Function of Stomata
Allow the exchange of gases between the plant and the atmosphere.
3. Chlorophyll
Green pigment that absorbs sunlight.
4. Heterotrophic Nutrition
Nutrition in which organisms depend on others for food.
Example: Cuscuta
5. Photosynthesis
Converts light energy into chemical energy stored in glucose.
Related Practice Questions
- Why is sunlight essential for photosynthesis?
- What is the function of stomata?
- Explain the role of chlorophyll.
- Why is Cuscuta called a heterotrophic plant?
- Name the essential conditions required for photosynthesis.
Mini Quiz Challenge
Fill in the blanks
- Carbon dioxide enters leaves through __________.
- Chlorophyll traps __________.
- Cuscuta shows __________ nutrition.
Answers
- Stomata
- Sunlight
- Heterotrophic
Exam Tips
✔ Remember the four essential conditions for photosynthesis.
✔ Learn the function of stomata.
✔ Revise the role of chlorophyll.
✔ Practice application-based NCERT questions.
✔ Understand different modes of nutrition.
Quick Revision Notes
✔ Photosynthesis needs sunlight.
✔ Chlorophyll traps solar energy.
✔ Carbon dioxide enters through stomata.
✔ Cuscuta is a heterotrophic plant.
✔ Green plants prepare glucose.
✔ Oxygen is released during photosynthesis.
✔ Leaves are the main site of food preparation.
Common Mistakes Students Make
❌ Confusing chlorophyll with stomata.
❌ Forgetting the order of photosynthesis.
❌ Thinking roots absorb carbon dioxide.
❌ Assuming all plants are autotrophs.
❌ Ignoring the importance of sunlight.
Key Takeaways
✔ Sunlight is essential for photosynthesis.
✔ Stomata regulate gaseous exchange.
✔ Chlorophyll captures light energy.
✔ Cuscuta is a heterotrophic parasitic plant.
✔ Photosynthesis produces glucose.
✔ Green plants are the primary producers.
FAQs
1. What happens if plants do not receive sunlight?
Photosynthesis slows down or stops, so plants cannot prepare sufficient food.
2. Through which structure does carbon dioxide enter the leaf?
Carbon dioxide enters through stomata.
3. What is the role of chlorophyll?
Chlorophyll absorbs sunlight for photosynthesis.
4. Why is Cuscuta called a heterotrophic plant?
Because it cannot prepare its own food and depends on a host plant.
5. What are the essential conditions for photosynthesis?
Sunlight, chlorophyll, carbon dioxide, and water.
Conclusion
Photosynthesis is the process that makes green plants self-dependent and supports all living organisms. Understanding the role of sunlight, chlorophyll, stomata, and heterotrophic plants helps students build a strong conceptual foundation. Regular practice of these NCERT-based MCQs improves analytical thinking and examination performance.
Related links
- Class 7 Maths Chapter 3 Data Handling part-8
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-7
- Class 7 Science Chapter 1 Nutrition in Plants part-6
- Class 7 Maths Chapter 3 Data Handling part-7
- Class 7 English Chapter 1 The Rainbow part-3
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-6
- Class 7 Science Chapter 1 Nutrition in Plants part-5
- Class 7 Maths Chapter 3 Data Handling part-6
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-5
- Class 7 Maths Chapter 3 Data Handling part-5
- Class 7 Science Chapter 1 Nutrition in Plants part-4
- Class 7 English Chapter 1 The Rainbow part-2
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