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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 NCERT-based MCQs on photosynthesis, autotrophs, chlorophyll, nitrogen fixation, and insectivorous plants 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
Plants prepare their own food through photosynthesis and play a vital role in maintaining the balance of nature. Along with understanding how food is prepared, students should also know how plants obtain nutrients from the soil and adapt to different environmental conditions. This practice set includes fresh, concept-based MCQs aligned with the latest NCERT syllabus.
What You Will Learn
✔ Difference between autotrophs and heterotrophs
✔ Nitrogen fixation
✔ Role of chlorophyll and stomata
✔ Adaptations of insectivorous plants
✔ Products of photosynthesis
✔ NCERT concept-based questions
✔ Exam-oriented practice
Why This Topic Is Important
This chapter introduces students to the scientific processes that allow plants to survive and support life on Earth. The concepts covered here are frequently tested in school exams, Olympiads, scholarship exams, and competitive entrance tests.
1. MCQ Questions with Detailed Solutions
Q1. Which of the following organisms is an autotroph?
A) Mushroom
B) Cuscuta
C) Sunflower
D) Bread Mould
Answer
C) Sunflower
Concept Behind This Question
Autotrophs prepare their own food through photosynthesis.
Step-by-Step Solution
Sunflower is a green plant containing chlorophyll.
It prepares food using sunlight, carbon dioxide, and water.
Mushroom, Cuscuta, and bread mould cannot prepare their own food.
Therefore, the correct answer is C.
Exam Tip
Green plants = Autotrophs
Q2. Which bacteria convert atmospheric nitrogen into usable nitrogen compounds?
A) Lactobacillus
B) Rhizobium
C) Amoeba
D) Yeast
Answer
B) Rhizobium
Concept Behind This Question
Rhizobium bacteria fix atmospheric nitrogen in the root nodules of leguminous plants.
Step-by-Step Solution
Atmospheric nitrogen cannot be directly used by plants.
Rhizobium bacteria convert it into useful nitrogen compounds.
These bacteria live inside the root nodules of leguminous plants.
Therefore, the correct answer is B.
Exam Tip
Rhizobium = Nitrogen Fixation
Q3. Which gas is released as a by-product during photosynthesis?
A) Carbon Dioxide
B) Oxygen
C) Nitrogen
D) Hydrogen
Answer
B) Oxygen
Concept Behind This Question
Plants release oxygen while preparing food.
Step-by-Step Solution
During photosynthesis:
- Carbon dioxide is absorbed.
- Water is used.
- Glucose is prepared.
- Oxygen is released into the atmosphere.
Therefore, the correct answer is B.
Exam Tip
Photosynthesis → Oxygen Release
Q4. Which adaptation helps a pitcher plant obtain nitrogen?
A) Deep roots
B) Colourful flowers
C) Pitcher-shaped leaves that trap insects
D) Thick stem
Answer
C) Pitcher-shaped leaves that trap insects
Concept Behind This Question
Pitcher plants trap insects to obtain nitrogen from nutrient-poor soil.
Step-by-Step Solution
The leaves of a pitcher plant are modified into pitcher-like structures.
Insects fall inside and are digested.
This provides nitrogen required for healthy growth.
Therefore, the correct answer is C.
Exam Tip
Modified Leaves = Pitcher Trap
Q5. Which process is directly responsible for preparing food in green plants?
A) Respiration
B) Germination
C) Photosynthesis
D) Transpiration
Answer
C) Photosynthesis
Concept Behind This Question
Photosynthesis is the process by which plants prepare food.
Step-by-Step Solution
Green plants use sunlight, chlorophyll, carbon dioxide, and water.
These are used to produce glucose.
Hence, food preparation takes place through photosynthesis.
Therefore, the correct answer is C.
Exam Tip
Photosynthesis = Food Preparation
Important Formulas & Concepts
1. Autotrophs
Organisms that prepare their own food.
Examples:
- Sunflower
- Mango
- Neem
2. Nitrogen Fixation
Rhizobium bacteria convert atmospheric nitrogen into usable compounds.
3. Products of Photosynthesis
- Glucose
- Oxygen
4. Insectivorous Plants
Plants that trap insects to obtain nitrogen.
Example:
- Pitcher Plant
5. Photosynthesis
The process by which green plants prepare food using sunlight.
Related Practice Questions
- What is an autotroph?
- Explain nitrogen fixation.
- Why do pitcher plants trap insects?
- Name the products of photosynthesis.
- Why is photosynthesis important?
Mini Quiz Challenge
Fill in the blanks
- __________ bacteria fix atmospheric nitrogen.
- Photosynthesis releases __________.
- Pitcher plants trap __________.
Answers
- Rhizobium
- Oxygen
- Insects
Exam Tips
✔ Learn the difference between autotrophs and heterotrophs.
✔ Remember the role of Rhizobium.
✔ Revise products of photosynthesis.
✔ Understand insectivorous plant adaptations.
✔ Practice concept-based NCERT questions.
Quick Revision Notes
✔ Sunflower is an autotroph.
✔ Rhizobium fixes nitrogen.
✔ Oxygen is released during photosynthesis.
✔ Pitcher plants trap insects.
✔ Glucose is the food prepared by plants.
✔ Green plants are producers.
✔ Chlorophyll is essential for photosynthesis.
Common Mistakes Students Make
❌ Thinking all plants are heterotrophs.
❌ Confusing Rhizobium with fungi.
❌ Forgetting that oxygen is released during photosynthesis.
❌ Assuming pitcher plants trap insects for energy.
❌ Mixing photosynthesis with respiration.
Key Takeaways
✔ Green plants are autotrophs.
✔ Rhizobium helps plants obtain nitrogen.
✔ Photosynthesis produces glucose and oxygen.
✔ Pitcher plants trap insects for nitrogen.
✔ Chlorophyll absorbs sunlight.
✔ Photosynthesis supports life on Earth.
FAQs
1. What is an autotroph?
An autotroph is an organism that prepares its own food through photosynthesis.
2. What is the function of Rhizobium bacteria?
They fix atmospheric nitrogen into a usable form for plants.
3. Why do pitcher plants trap insects?
They trap insects to obtain nitrogen from nutrient-poor soil.
4. Which gas is released during photosynthesis?
Oxygen is released during photosynthesis.
5. What is the main product of photosynthesis?
The main product is glucose.
Conclusion
Plants are essential for life because they prepare food and release oxygen through photosynthesis. Understanding autotrophs, nitrogen fixation, insectivorous plants, and the products of photosynthesis helps students build a strong scientific foundation. Regular NCERT-based MCQ practice improves conceptual understanding and exam performance.
Related links
- Class 7 English Chapter 1 The Rainbow-part-4
- Class 7 Social Science Chapter 1 Tracing Changes Through a Thousand Years part-8
- Class 7 Science Chapter 1 Nutrition in Plants part-7
- 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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