Class 7 Science | Nutrition in Plants Chlorophyll, Stomata

Welcome To My School Study

Practice Class 7 Science Nutrition in Plants MCQs based on the latest NCERT syllabus. Learn about chlorophyll, stomata, carbon dioxide, parasitic plants, and insectivorous plants with detailed solutions, revision notes, exam tips, FAQs, and practice questions. Ideal for Class 7 school exams and Olympiad preparation.

Do You Know

Chapter Information

• Class: 7
• Subject: Science
• Chapter: Nutrition in Plants
• Topic: Chlorophyll, Stomata, Photosynthesis & Special Types of Plants
• Difficulty Level: Easy
• Based On: Latest NCERT
• Total Questions: 5
• Suitable For: School Exams, Unit Tests, Half-Yearly, Annual Exams & Olympiad Preparation

Introduction

Plants are living organisms that prepare their own food through the process of photosynthesis. For this process, plants require chlorophyll, sunlight, carbon dioxide, and water. They also have tiny pores called stomata that help in the exchange of gases.

This MCQ set covers the most important NCERT concepts related to chlorophyll, stomata, parasitic plants, insectivorous plants, and photosynthesis. These questions are frequently asked in Class 7 Science examinations.

What You Will Learn

After completing this MCQ set, you will be able to:

• Identify the green pigment present in leaves.
• Understand the function of stomata.
• Recognize parasitic plants.
• Know how plants obtain carbon dioxide.
• Identify insectivorous plants.

Why This Topic Is Important

This topic is important because:

• It explains how plants prepare their own food.
• It is one of the most frequently asked topics in Class 7 Science.
• It builds a strong foundation for higher biology concepts.
• Questions based on chlorophyll, stomata, and photosynthesis are common in school and competitive examinations.
• Understanding these concepts helps students appreciate the importance of plants in maintaining ecological balance.

5 MCQs with Detailed Solutions

Question 1

The green pigment present in leaves is called:

1. Albumin
2. Starch
3. Chlorophyll
4. Hemoglobin

Correct Answer: Chlorophyll

Detailed Solution

Chlorophyll is the green pigment present in the chloroplasts of plant cells. It absorbs sunlight, which provides the energy needed for photosynthesis.

Without chlorophyll, plants cannot prepare their own food efficiently.

Exam Fact: Chlorophyll is responsible for the green colour of most leaves.

Question 2

The small pores on the surface of leaves for gas exchange are called:

1. Root hairs
2. Chlorophyll
3. Veins
4. Stomata

Correct Answer: Stomata

Detailed Solution

Stomata are tiny pores found mainly on the lower surface of leaves. They allow carbon dioxide to enter the leaf and oxygen and water vapour to leave during photosynthesis and respiration.

Each stoma is controlled by two guard cells that regulate its opening and closing.

Question 3

Which of the following is a parasite?

1. Algae
2. Cuscuta (Amarbel)
3. Mushroom
4. Pitcher plant

Correct Answer: Cuscuta (Amarbel)

Detailed Solution

Cuscuta, also known as Amarbel, is a parasitic plant. It does not prepare enough food by itself and absorbs nutrients and water from another living plant.

It wraps around the host plant and obtains nourishment through specialized structures called haustoria.

Remember: Cuscuta is a parasite, while the pitcher plant is insectivorous.

Question 4

Plants take carbon dioxide from the atmosphere mainly through their:

1. Roots
2. Stem
3. Flowers
4. Leaves

Correct Answer: Leaves

Detailed Solution

Plants absorb carbon dioxide mainly through the stomata present on their leaves. The carbon dioxide is then used during photosynthesis to prepare glucose.

Although stomata are the actual openings, they are mainly present on the leaves. Therefore, “Leaves” is the correct answer.

Question 5

Which of the following is an insectivorous plant?

1. Neem
2. Pitcher plant
3. Rose
4. Wheat

Correct Answer: Pitcher Plant

Detailed Solution

The pitcher plant is an insectivorous plant that traps and digests insects. It grows in nitrogen-deficient soil, so it obtains nitrogen by digesting insects.

Its modified leaf forms a pitcher-like structure that traps insects.

Interesting Fact: Insectivorous plants still perform photosynthesis but supplement their nutrition by digesting insects.

Important Formulas & Concepts

Chlorophyll

• Green pigment present in leaves.
• Absorbs sunlight for photosynthesis.

Stomata

• Tiny pores on the leaf surface.
• Help in gaseous exchange.
• Controlled by guard cells.

Photosynthesis Equation

Carbon Dioxide + Water → Glucose + Oxygen
(In the presence of sunlight and chlorophyll)

Parasitic Plants

• Depend on host plants for food.
• Example: Cuscuta (Amarbel)

Insectivorous Plants

• Trap insects to obtain nutrients, especially nitrogen.
• Example: Pitcher Plant

Related Practice Questions

1. What is the function of chlorophyll?
2. Which cells control the opening and closing of stomata?
3. Why do insectivorous plants trap insects?
4. What is the role of carbon dioxide in photosynthesis?
5. Name two parasitic plants.
6. Which gas is released during photosynthesis?
7. Why are leaves called the food factories of plants?
8. Which plant depends on another plant for nutrition?

Mini Quiz Challenge

Q1.

Which gas is released during photosynthesis?

1. Nitrogen
2. Oxygen
3. Carbon dioxide
4. Hydrogen

Q2.

Which structure regulates the opening and closing of stomata?

1. Root hairs
2. Guard cells
3. Xylem
4. Phloem

Answers

1. 2 (Oxygen)

2. 2 (Guard Cells)

Exam Tips

• Remember that chlorophyll is a pigment, not a plant tissue.
• Stomata are tiny pores mainly found on the lower surface of leaves.
• Do not confuse parasitic plants with insectivorous plants.
• Carbon dioxide enters the plant through stomata present in the leaves.
• Learn the photosynthesis equation carefully, as it is frequently asked in exams.

Quick Revision Notes

• Chlorophyll gives leaves their green colour.
• Chlorophyll captures sunlight for photosynthesis.
• Stomata are responsible for gas exchange.
• Leaves absorb carbon dioxide from the atmosphere.
• Cuscuta is a parasitic plant.
• Pitcher plant is an insectivorous plant.
• Photosynthesis produces glucose and oxygen.

Common Mistakes Students Make

• Confusing chlorophyll with chloroplast.
• Thinking stomata are found in roots.
• Considering mushroom as a parasitic plant.
• Believing plants absorb carbon dioxide through roots.
• Confusing insectivorous plants with parasitic plants.

Key Takeaways

• Chlorophyll is the green pigment responsible for absorbing sunlight.
• Stomata help in the exchange of gases.
• Cuscuta is a parasitic plant.
• Leaves absorb carbon dioxide for photosynthesis.
• Pitcher plant is an insectivorous plant that traps insects for nutrition.

FAQs

1. What is chlorophyll?

Chlorophyll is the green pigment present in leaves that absorbs sunlight for photosynthesis.

2. What are stomata?

Stomata are tiny pores on the surface of leaves that help in the exchange of gases.

3. Which plant is a parasite?

Cuscuta (Amarbel) is a parasitic plant.

4. Through which part do plants absorb carbon dioxide?

Plants mainly absorb carbon dioxide through the stomata present on their leaves.

5. Why is the pitcher plant called an insectivorous plant?

Because it traps and digests insects to obtain nutrients, especially nitrogen.

Conclusion

Understanding chlorophyll, stomata, photosynthesis, and special types of plants is essential for mastering Class 7 Science. Regular practice of these NCERT-based MCQs will strengthen your concepts and improve your performance in school exams, scholarship tests, and Olympiads.

NCERT Reference

Source: NCERT Class 7 Science

• Chapter 1 – Nutrition in Plants

Difficulty Level: Easy

Related links

• Class 7 Maths Chapter 2 Fractions and Decimals – Part 8
• Class 7 Maths Chapter 2 Fractions and Decimals,division – Part 7
• Class 7 Maths Chapter 2 Fractions and Decimals – Part 6
• Class 7 Maths Chapter 2 Fractions and Decimals MCQs – Part 5
• Class7 Maths Chapter2 Fractions, Decimals, multiplication MCQ – Part 4
• Class 7 Maths Chapter2 Fractions and Decimals all topic MCQ -Part 3
• Class 7 Maths Chapter 2 Fractions and Decimals MCQ – Part 2

Latest Posts

• Class 9 Maths Chapter 4 Linear Equations in Two Variables
• Class 7 Maths Chapter 4 Simple Equations
• Class 8 Maths Chapter 4 Practical Geometry
• Class 10 Maths Chapter 4 Quadratic Equations
• Class 9 Science Chapter 1 Matter in Our Surroundings

Join Our Other Communities

Instagram , Youtube , Facebook