MCQ Questions for Class 7 Science Chapter 1 Nutrition in Plants
1. Which of the following components of food provides energy to organisms?
a) Carbohydrates
b) Proteins
c) Fats
d) All of the above
Answer: d) All of the above
2. The process by which autotrophic green plants make their own food is called:
a) Digestion
b) Respiration
c) Photosynthesis
d) Assimilation
Answer: c) Photosynthesis
3. Where does photosynthesis primarily occur in plants?
a) Roots
b) Stems
c) Leaves
d) Flowers
Answer: c) Leaves
4. What is the main pigment responsible for capturing sunlight during photosynthesis?
a) Melanin
b) Chlorophyll
c) Hemoglobin
d) Xanthophyll
Answer: b) Chlorophyll
5. Which type of nutrition involves organisms making their own food?
a) Heterotrophic nutrition
b) Autotrophic nutrition
c) Holozoic nutrition
d) Saprophytic nutrition
Answer: b) Autotrophic nutrition
6. Organisms that cannot prepare their own food and depend on other organisms for food are called:
a) Autotrophs
b) Heterotrophs
c) Decomposers
d) Producers
Answer: b) Heterotrophs
7. Which gas is required for photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Answer: b) Carbon dioxide
8. Which of the following is not a component of food?
a) Vitamins
b) Minerals
c) Water
d) Cellulose
Answer: c) Water
9. What is the primary source of food for humans and animals?
a) Fruits and vegetables
b) Meat and dairy products
c) Nuts and seeds
d) Green plants
Answer: d) Green plants
10. Which process involves the breakdown of food and release of energy in organisms?
a) Respiration
b) Excretion
c) Reproduction
d) Photosynthesis
Answer: a) Respiration
11. What are the structural and functional units of all living organisms?
a) Organs
b) Tissues
c) Cells
d) Systems
Answer: c) Cells
12. Which part of the cell is responsible for capturing energy from sunlight during photosynthesis?
a) Nucleus
b) Cell membrane
c) Cytoplasm
d) Chloroplasts
Answer: d) Chloroplasts
13. Where does photosynthesis primarily occur in green plants?
a) Roots
b) Stems
c) Leaves
d) Flowers
Answer: c) Leaves
14. What is the main product of photosynthesis?
a) Glucose
b) Oxygen
c) Starch
d) Protein
Answer: a) Glucose
15. Which gas is taken in by plants during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Nitrogen
d) Hydrogen
Answer: b) Carbon dioxide
16. Which substance surrounds the nucleus of a cell?
a) Cell membrane
b) Cytoplasm
c) Chloroplasts
d) Stomata
Answer: b) Cytoplasm
17. Which is the ultimate source of energy for all living organisms?
a) Sunlight
b) Water
c) Air
d) Soil
Answer: a) Sunlight
18. What is the primary food material produced by photosynthesis?
a) Starch
b) Protein
c) Fats
d) Minerals
Answer: a) Starch
19. Which type of plants obtain their food from other plants or animals?
a) Autotrophic plants
b) Heterotrophic plants
c) Parasitic plants
d) Carnivorous plants
Answer: c) Parasitic plants
20. How do parasitic plants obtain their food?
a) Through photosynthesis
b) By absorbing nutrients from the soil
c) By consuming other organisms
d) From other plants or animals
Answer: d) From other plants or animals
21. Which element is essential for the synthesis of proteins in plants?
a) Carbon
b) Hydrogen
c) Oxygen
d) Nitrogen
Answer: d) Nitrogen
22. Which nutrient is stored in the form of oil in some plant seeds?
a) Starch
b) Glucose
c) Proteins
d) Fats
Answer: d) Fats
23. What are plants called that trap and digest insects for their nutrition?
a) Autotrophic plants
b) Heterotrophic plants
c) Carnivorous plants
d) Symbiotic plants
Answer: c) Carnivorous plants
24. Which part of the carnivorous plant traps insects?
a) Roots
b) Leaves
c) Flowers
d) Stems
Answer: b) Leaves
25. What do carnivorous plants lack that they obtain from insects?
a) Water
b) Carbon dioxide
c) Nitrogen
d) Oxygen
Answer: c) Nitrogen
26. Which mode of nutrition involves obtaining nutrients from dead and decaying matter?
a) Autotrophic nutrition
b) Heterotrophic nutrition
c) Symbiotic nutrition
d) Saprotrophic nutrition
Answer: d) Saprotrophic nutrition
27. Which group of organisms includes fungi that obtain nutrients from dead matter?
a) Autotrophs
b) Heterotrophs
c) Carnivores
d) Herbivores
Answer: b) Heterotrophs
28. What type of plants are fungi like mushrooms that grow on dead and decaying matter?
a) Carnivorous plants
b) Symbiotic plants
c) Saprotrophic plants
d) Insectivorous plants
Answer: c) Saprotrophic plants
29. What is the association called in which algae and fungus live together?
a) Symbiosis
b) Parasitism
c) Commensalism
d) Mutualism
Answer: d) Mutualism
30. Which bacteria convert atmospheric nitrogen into water-soluble nitrogen compounds for plants?
a) Rhizobium bacteria
b) Nitrosomonas bacteria
c) E. coli bacteria
d) Streptococcus bacteria
Answer: a) Rhizobium bacteria
31. Where do Rhizobium bacteria live in plants?
a) Leaves
b) Flowers
c) Stems
d) Root nodules
Answer: d) Root nodules
32. What is the benefit of the association between Rhizobium bacteria and leguminous plants?
a) Bacteria provide food for plants
b) Plants provide shelter for bacteria
c) Plants provide nitrogen for bacteria
d) Both plants and bacteria provide each other with benefits
Answer: d) Both plants and bacteria provide each other with benefits
33. What is the significance of the association between Rhizobium bacteria and leguminous plants for farmers?
a) It increases crop yield
b) It eliminates the need for water irrigation
c) It reduces the need for nitrogen fertilizers
d) It enhances soil fertility
Answer: c) It reduces the need for nitrogen fertilizers