ANAND CLASSES provides the following MCQs to understand the concepts related to food, nutrients, and modes of nutrition for Class 10 Science Biology of chapter Life Processes with topic Nutrition In Living Organisms.
1. What is the simplest form of food?
A) Starch
B) Glucose
C) Protein
D) Fat
✅ Answer: B) Glucose
Explanation: Glucose is a simple sugar and is the simplest form of food. Starch, a more complex food, is made from glucose.
2. What is the general category of substances that include glucose and starch?
A) Proteins
B) Fats
C) Carbohydrates
D) Vitamins
✅ Answer: C) Carbohydrates
Explanation: Both glucose and starch belong to the carbohydrate category, which is the primary source of energy for living organisms.
3. Which of the following is NOT included in the wider definition of food?
A) Mineral salts
B) Vitamins
C) Water
D) Oxygen
✅ Answer: D) Oxygen
Explanation: Food includes carbohydrates, proteins, fats, minerals, vitamins, and water. Oxygen is essential for respiration but is not considered a food component.
4. What is the process of taking in and utilizing food called?
A) Digestion
B) Nutrition
C) Respiration
D) Excretion
✅ Answer: B) Nutrition
Explanation: Nutrition refers to the intake and utilization of food to provide energy and support metabolic activities in an organism.
5. What is a nutrient?
A) A type of carbohydrate
B) An organic or inorganic substance required for life
C) A waste product of digestion
D) A chemical that aids in respiration
✅ Answer: B) An organic or inorganic substance required for life
Explanation: A nutrient is a substance that an organism obtains from its surroundings and uses for energy or biosynthesis of body components.
6. Which of the following nutrients are primarily used for energy?
A) Proteins and minerals
B) Carbohydrates and fats
C) Vitamins and water
D) Proteins and water
✅ Answer: B) Carbohydrates and fats
Explanation: Carbohydrates and fats serve as the main sources of energy in organisms, while proteins and minerals are used for body building and repair.
7. Which nutrient is essential for the biosynthesis of body constituents like skin and blood?
A) Carbohydrates
B) Fats
C) Proteins
D) Water
✅ Answer: C) Proteins
Explanation: Proteins are used by organisms for growth and repair, helping to build tissues like skin and blood.
8. Which of the following is NOT a mode of nutrition?
A) Autotrophic
B) Heterotrophic
C) Chemotrophic
D) None of the above
✅ Answer: C) Chemotrophic
Explanation: The two main modes of nutrition are autotrophic (organisms make their own food) and heterotrophic (organisms depend on others for food). “Chemotrophic” is not one of the primary classifications mentioned in the article.
9. How do organisms obtain their food?
A) All organisms obtain food in the same way
B) Different organisms have different methods of obtaining food
C) Only plants obtain food, while animals do not need food
D) Food is not necessary for survival
✅ Answer: B) Different organisms have different methods of obtaining food
Explanation: Organisms differ in their modes of nutrition; some make their own food (autotrophs), while others depend on other sources (heterotrophs).
10. What are the two main modes of nutrition?
A) Photosynthesis and respiration
B) Autotrophic and heterotrophic
C) Aerobic and anaerobic
D) Ingestion and digestion
✅ Answer: B) Autotrophic and heterotrophic
Explanation: Organisms can obtain food either by making it themselves (autotrophic nutrition) or by depending on other organisms (heterotrophic nutrition).
11. Which of the following is a complex food?
A) Glucose
B) Starch
C) Water
D) Oxygen
✅ Answer: B) Starch
Explanation: Starch is a complex carbohydrate made from glucose molecules linked together. Glucose, in contrast, is a simple sugar.
12. What is the main function of carbohydrates in the body?
A) Body-building
B) Energy supply
C) Regulation of body processes
D) Transport of oxygen
✅ Answer: B) Energy supply
Explanation: Carbohydrates provide the primary source of energy required for various metabolic activities in an organism.
13. What is the term used for the intake and utilization of nutrients?
A) Nutrition
B) Digestion
C) Photosynthesis
D) Respiration
✅ Answer: A) Nutrition
Explanation: Nutrition is the process of consuming and utilizing food to obtain energy and build body structures.
14. Which of the following is NOT a nutrient?
A) Carbohydrates
B) Proteins
C) Water
D) Oxygen
✅ Answer: D) Oxygen
Explanation: Nutrients are substances obtained from food that provide energy and help in body-building. Oxygen is required for respiration but is not classified as a nutrient.
15. Which nutrient is primarily responsible for tissue repair and growth?
A) Carbohydrates
B) Fats
C) Proteins
D) Vitamins
✅ Answer: C) Proteins
Explanation: Proteins help in the repair and growth of body tissues, such as muscles, skin, and blood.
16. Which of the following nutrients helps in the formation of blood?
A) Carbohydrates
B) Minerals
C) Fats
D) Water
✅ Answer: B) Minerals
Explanation: Minerals like iron are essential for the formation of blood components, such as hemoglobin in red blood cells.
17. What is the main source of energy for living organisms?
A) Proteins
B) Fats
C) Carbohydrates
D) Water
✅ Answer: C) Carbohydrates
Explanation: Carbohydrates provide quick energy to organisms and are the most commonly used energy source.
18. Which nutrient helps in maintaining body temperature and protecting organs?
A) Carbohydrates
B) Proteins
C) Fats
D) Vitamins
✅ Answer: C) Fats
Explanation: Fats provide insulation, help in maintaining body temperature, and act as a cushion for vital organs.
19. What is the difference between autotrophic and heterotrophic nutrition?
A) Autotrophic organisms depend on others, while heterotrophic organisms make their own food
B) Autotrophic organisms make their own food, while heterotrophic organisms depend on others for food
C) Both autotrophic and heterotrophic organisms make their own food
D) Both autotrophic and heterotrophic organisms depend on others for food
✅ Answer: B) Autotrophic organisms make their own food, while heterotrophic organisms depend on others for food
Explanation: Autotrophic organisms, like plants, synthesize their own food using sunlight, while heterotrophic organisms, like animals, obtain food from other sources.
20. What is the primary mode of nutrition in plants?
A) Heterotrophic
B) Autotrophic
C) Saprophytic
D) Parasitic
✅ Answer: B) Autotrophic
Explanation: Plants make their own food through photosynthesis, making them autotrophic organisms.
21. Which of the following organisms follows heterotrophic nutrition?
A) Algae
B) Trees
C) Humans
D) Grass
✅ Answer: C) Humans
Explanation: Humans depend on other organisms for food and cannot produce their own, making them heterotrophic.
22. Which of the following best defines a nutrient?
A) A substance that helps in digestion
B) A substance obtained from food that provides energy or helps in body-building
C) A waste product of metabolism
D) A byproduct of respiration
✅ Answer: B) A substance obtained from food that provides energy or helps in body-building
Explanation: Nutrients are essential for energy, growth, and maintenance of body functions.
23. Which of the following is NOT a mode of heterotrophic nutrition?
A) Parasitic
B) Saprophytic
C) Autotrophic
D) Holozoic
✅ Answer: C) Autotrophic
Explanation: Autotrophic nutrition involves making food through photosynthesis, while heterotrophic nutrition includes parasitic, saprophytic, and holozoic nutrition.
24. Which of the following is a correct statement?
A) All organisms use the same method to obtain food
B) Only animals require nutrition
C) Plants do not need nutrition
D) Different organisms have different methods of obtaining food
✅ Answer: D) Different organisms have different methods of obtaining food
Explanation: Organisms have different modes of nutrition, such as autotrophic (plants) and heterotrophic (animals and fungi).
25. What is the role of vitamins in nutrition?
A) Provide energy
B) Help in metabolic processes and immunity
C) Form body structures
D) Act as the main nutrient for respiration
✅ Answer: B) Help in metabolic processes and immunity
Explanation: Vitamins regulate various biochemical processes and strengthen the immune system.
🔷 Best Coaching Center for IIT-JEE, NEET, and Foundations
🔹 ANAND CLASSES – The best coaching institute for JEE, NEET, and Class 11-12 Foundations.
🔹 Buy complete study material at 👉 https://publishers.anandclasses.co.in/
🔹 Proprietor: NIRMAL ANAND Educations
🔹 Written by: Neeraj Anand
🔹 Published by: Anand Technical Publishers under Anand Classes
📞 Contact: +91-9463138669
📧 Email: anandclasses1996@gmail.com
