ANAND CLASSES study material and notes explore multiple-choice questions (MCQs) on Modes of Nutrition, covering Autotrophic and Heterotrophic Nutrition, with detailed explanations for Class 10 Science Biology.
Multiple-Choice Questions (MCQs) on Modes of Nutrition for Class 10 Science Biology.
1. What are the two main modes of nutrition?
A) Photosynthetic and Chemosynthetic
B) Autotrophic and Heterotrophic
C) Parasitic and Saprophytic
D) Ingestive and Absorptive
Answer: B) Autotrophic and Heterotrophic
Explanation: Organisms obtain food through two main modes: autotrophic (self-nutrition) and heterotrophic (nutrition from others).
2. Which of the following is an autotroph?
A) Tiger
B) Mushroom
C) Mango tree
D) Human
Answer: C) Mango tree
Explanation: Autotrophs synthesize their own food using sunlight. Plants like the mango tree are autotrophs.
3. What is the primary source of energy for autotrophic nutrition?
A) Water
B) Carbon dioxide
C) Sunlight
D) Oxygen
Answer: C) Sunlight
Explanation: Autotrophs use sunlight to convert inorganic substances into food through photosynthesis.
4. Which pigment in plants helps in photosynthesis?
A) Haemoglobin
B) Carotene
C) Chlorophyll
D) Melanin
Answer: C) Chlorophyll
Explanation: Chlorophyll traps sunlight energy, enabling plants to perform photosynthesis.
5. Which organisms have a heterotrophic mode of nutrition?
A) Green plants
B) Bacteria
C) Humans
D) All of the above
Answer: C) Humans
Explanation: Heterotrophs obtain food from other organisms; humans cannot produce their own food.
6. Which of these is an example of heterotrophic nutrition?
A) Photosynthesis
B) Chemosynthesis
C) Parasitism
D) None of the above
Answer: C) Parasitism
Explanation: Parasitic organisms depend on a host for nutrition, making it a heterotrophic mode.
7. Which of the following is a heterotroph?
A) Cyanobacteria
B) Rose plant
C) Lion
D) Algae
Answer: C) Lion
Explanation: Lions depend on other animals for food and do not produce their own food.
8. What do saprophytes feed on?
A) Living organisms
B) Dead and decaying matter
C) Sunlight
D) Oxygen
Answer: B) Dead and decaying matter
Explanation: Saprophytes, like fungi, decompose dead matter for nutrition.
9. Which of the following is a saprophyte?
A) Amoeba
B) Tiger
C) Yeast
D) Rose plant
Answer: C) Yeast
Explanation: Yeast is a non-green plant that feeds on decaying matter.
10. What is the role of autotrophs in the ecosystem?
A) Consumers
B) Decomposers
C) Producers
D) Parasites
Answer: C) Producers
Explanation: Autotrophs produce food for themselves and other organisms in the ecosystem.
11. What is chemosynthesis?
A) Making food using sunlight
B) Making food using chemical energy
C) Consuming food from others
D) Breaking down food externally
Answer: B) Making food using chemical energy
Explanation: Some bacteria synthesize food using chemical energy instead of sunlight.
12. Which organism follows mixotrophic nutrition?
A) Euglena
B) Paramecium
C) Fungi
D) Amoeba
Answer: A) Euglena
Explanation: Euglena can perform photosynthesis like plants and consume food like animals.
13. What is holozoic nutrition?
A) Consuming liquid food
B) Engulfing solid food
C) Absorbing nutrients from decaying matter
D) Obtaining food through diffusion
Answer: B) Engulfing solid food
Explanation: Holozoic nutrition involves the ingestion, digestion, absorption, and assimilation of food.
14. Which of the following is a parasitic plant?
A) Neem tree
B) Cuscuta
C) Mango tree
D) Banyan tree
Answer: B) Cuscuta
Explanation: Cuscuta (dodder plant) depends on a host plant for food and is a parasite.
15. What do insectivorous plants obtain from insects?
A) Carbohydrates
B) Water
C) Nitrogen
D) Oxygen
Answer: C) Nitrogen
Explanation: Insectivorous plants like Venus flytrap trap insects to obtain nitrogen for growth.
16. How do fungi obtain nutrition?
A) Photosynthesis
B) Chemosynthesis
C) Absorbing nutrients from dead organisms
D) Engulfing food particles
Answer: C) Absorbing nutrients from dead organisms
Explanation: Fungi use extracellular digestion to break down and absorb nutrients from dead material.
17. Which of the following is NOT a mode of heterotrophic nutrition?
A) Parasitism
B) Saprophytism
C) Chemosynthesis
D) Holozoic nutrition
Answer: C) Chemosynthesis
Explanation: Chemosynthesis is an autotrophic mode of nutrition that uses chemical energy to produce food.
18. How do omnivores obtain food?
A) They consume only plants
B) They consume only animals
C) They consume both plants and animals
D) They rely on dead organisms
Answer: C) They consume both plants and animals
Explanation: Omnivores, like humans and bears, eat both plant and animal-based food sources.
19. What is symbiotic nutrition?
A) Organisms benefiting each other in a mutual relationship
B) One organism harming another for food
C) Organisms feeding on decaying matter
D) Organisms consuming only animal matter
Answer: A) Organisms benefiting each other in a mutual relationship
Explanation: In symbiotic nutrition, both organisms benefit, as seen in lichens (fungi and algae).
20. What is the role of decomposers?
A) They produce food
B) They consume other animals
C) They break down dead matter into simpler substances
D) They only feed on living organisms
Answer: C) They break down dead matter into simpler substances
Explanation: Decomposers like bacteria and fungi recycle nutrients by decomposing organic matter.
21. Which type of nutrition is observed in Rhizobium bacteria?
A) Autotrophic
B) Saprophytic
C) Symbiotic
D) Parasitic
Answer: C) Symbiotic
Explanation: Rhizobium bacteria form a mutualistic relationship with leguminous plants, fixing nitrogen in exchange for nutrients.
22. Which of the following is an example of parasitic nutrition?
A) Lichens
B) Pitcher plant
C) Cuscuta
D) Mushroom
Answer: C) Cuscuta
Explanation: Cuscuta (dodder) lacks chlorophyll and extracts nutrients from a host plant.
23. Which mode of nutrition is followed by Plasmodium?
A) Autotrophic
B) Parasitic
C) Saprophytic
D) Symbiotic
Answer: B) Parasitic
Explanation: Plasmodium, the malarial parasite, lives in the human bloodstream and depends on a host for survival.
24. Which of the following is NOT an insectivorous plant?
A) Venus flytrap
B) Pitcher plant
C) Cactus
D) Sundew
Answer: C) Cactus
Explanation: Insectivorous plants trap insects for additional nitrogen, but a cactus is adapted for desert survival, not insectivory.
25. In lichens, which organism performs photosynthesis?
A) Fungi
B) Algae
C) Bacteria
D) Amoeba
Answer: B) Algae
Explanation: Lichens are a mutualistic association where algae perform photosynthesis, providing food for fungi.
26. How do decomposers contribute to the ecosystem?
A) By producing oxygen
B) By breaking down dead organisms
C) By consuming plants
D) By absorbing sunlight
Answer: B) By breaking down dead organisms
Explanation: Decomposers, like fungi and bacteria, recycle nutrients by breaking down organic matter.
27. What type of nutrition is found in amoeba?
A) Parasitic
B) Saprophytic
C) Holozoic
D) Symbiotic
Answer: C) Holozoic
Explanation: Amoeba engulfs food particles via phagocytosis, digesting them internally.
28. What is the source of energy in chemosynthetic bacteria?
A) Sunlight
B) Organic molecules
C) Inorganic chemicals
D) Water
Answer: C) Inorganic chemicals
Explanation: Chemosynthetic bacteria derive energy from chemical reactions involving inorganic substances.
29. Which organism uses absorptive nutrition?
A) Humans
B) Fungi
C) Fish
D) Cow
Answer: B) Fungi
Explanation: Fungi secrete enzymes outside their bodies to break down food and absorb nutrients.
30. Why are heterotrophic organisms dependent on autotrophs?
A) For oxygen and food
B) Only for food
C) Only for oxygen
D) They are not dependent
Answer: A) For oxygen and food
Explanation: Autotrophs provide food through photosynthesis and release oxygen as a byproduct.
🔷 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
