Question

Class 7 Science MCQ Question of Nutrition in Plants with Answers?

Answer 1

   Students are encouraged to practice the free MCQ Questions for Class 7 Science Nutrition in Plants with Answers is accessible here. These MCQ Questions on Nutrition in Plants Class 7 with answers for a fast amendment of the Chapter in this way assisting you with upgrading subject knowledge. Every one of the MCQ Questions is chosen to structure the Class 7 Science entire syllabus. 

Solving the Nutrition in Plants Multiple Choice Questions of Class 7 Science MCQ can be of outrageous assistance as you will know about every one of the ideas. MCQ Questions for Class 7 Science with Answers are ready according to the Latest Exam Pattern. Students can solve this Nutrition in Plants Class 7 MCQ Questions with Answers and evaluate their preparation level. Start Practice MCQ Questions for Class 7 Science with Answers consistently and score more marks in tests.

Practice MCQ Questions for Class 7 Science

1. Which of the following is a nutrient?

(a) Protein
(b) Fat
(c) Vitamin
(d) All of these

2. Human beings can be categorised as

(a) heterotrophs
(b) autotrophs
(c) parasites
(d) saprotrophs

3. The food making process in plants is called as

(a) glycolysis
(b) photosynthesis
(c) photolysis
(d) chemosynthesis

4. Which part of the plant is called its food factory ?

(a) Fruits
(b) Seeds
(c) Leaves
(d) Flowers

5. Tiny pores present on the surface of leaves through which gaseous exchange occurs are called

(a) stomata
(b) guard cells
(c) food holes
(d) gas holes

6. What is the ultimate source of energy for all living organisms?

(a) Water energy
(b) Wind energy
(c) Solar energy
(d) Chemical energy

7. Green pigment present in the leaves is called

(a) haemoglobin
(b) globulin
(c) albumin
(d) chlorophyll

8. During photosynthesis

(а) solar energy is converted into chemical energy
(b) solar energy is converted into mechanical energy
(c) chemical energy is converted into mechanical energy
(d) bioenergy is converted into chemical energy

9. The raw materials for photosynthesis are

(а) CO₂
(b) CO₂, O₂, H₂
(c) N₂ water
(d) O₂ water

10. Which one of the following is a parasite?

(a) Lichen
(b) Cuscuta
(c) Pitcher plant
(d) Rhizobium

11. Which of the following class of organisms belongs to saprotrophs?

(a) Fungi
(b) Algae
(c) Lichens
(d) Bryophytes

12. Which of the following is an insectivorous plant?

(a) Pitcher plant
(b) Indian telegraph plant
(c) 4 ‘O’clock plant
(d) Cuscuta

13. The bacterium which provides nitrogen to the leguminous plants is 

(a) Rhizobium 
(b) Yeast
(c) Fungi  
(d) Lichens

14. ___________ gas is released by the plants in the process of Photosynthesis

(a) Oxygen
(b) Carbon dioxide
(c) Nitrogen 
(d) Hydrogen

15. Which of the following is true about saprophytes?

(a) They trap insects to meet their nitrogen requirement.
(b) They live on decaying organic matter
(c) They share their food and shelter
(d) Saprophytes contain chlorophyll.

16. Iodine used to detect presence of starch. It gives starch

(a) blue-black colour
(b) red colour
(c) green colour
(d) colourless appearance

17. Which one of the following is an autotroph?

(a) Lichens
(b) Algae
(c) Fungus
(d) Cuscuta

18. Pitcher plant traps insects because it

(a) is a heterotroph
(b) grows in soils which lacks nitrogen
(c) does not have chlorophyll
(d) has a digestive system like human beings

19. Yeast, mushroom and bread-mould are

(a) autotrophic
(b) insectivorous
(c) saprophytic
(d) parasitic

20. When two organisms are good friends and live together and they benefit each other. Such an association of organisms is termed as

(a) saprophyte
(b) parasite
(c) autotroph
(d) symbiosis

21. The organisms that provides nutrients to parasitic organisms are known as …………………

(a) hosts
(b) parasite
(c) autotroph
(d) heterotrophs

22. Chlorophyll is present inside the

(a) Stroma
(b) Thylakoids
(c) hypodermis
(d) granna

23. Plants take carbon dioxide from the atmosphere mainly through their:

(a) Roots
(b) Stem
(c) Flowers
(d) Leaves

24. Which structure in a green plant controls the opening and closing of stomata?

(a) Guard cell
(b) Mesophyll
(c) Phloem
(d) Xylem

25. Most of the pulses are obtained from ____ plants ?

(a) Leguminous
(b) Cuscuta
(c) Maize
(d) Xylem

Answer 2

1. Answer: (d) All of these

Explanation: Nutrient is a necessity for human body to survive, grow and reproduce. There are six major nutrients: Vitamins, Proteins, Fats, Water, Minerals and Carbohydrates.

2. Answer: (a) heterotrophs

Explanation: Humans are heterotrophs. They cannot synthesize their own food and hence, dependent on other sources (plants and animals) for nutrition.

3. Answer: (b) photosynthesis

Explanation: This process, called photosynthesis, produces food for the plant and release oxygen into the air.

4. Answer: (c) Leaves

Explanation: Leaves are the specialized structures for food production and hence, called food factories of the plants.

5. Answer: (a) stomata

Explanation: The pores through which leaves exchange gases is Stomata. They are the small openings present on the inner surface of the leaves. Stomata can be opened and closed. During night when no photosynthesis take place the plant breathe in oxygen and breathe out carbon dioxide through stomata.

6. Answer: (c) Solar energy

Explanation: Photosynthesis is a process used by plants and other organisms to convert light energy, into chemical energy. It takes place by two steps light reaction and dark reaction. Light reaction synthesizes ATP and NADPH₂ which is utilized for fixation of carbon dioxide into carbohydrates during the dark reaction. So, the sun is called as the ultimate source of energy for all living organisms. 

7. Answer: (d) chlorophyll

Explanation:: Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis.

8. Answer: (а) solar energy is converted into chemical energy

Explanation: Plants use the process called photosynthesis which converts light energy (solar energy) into chemical energy. With the help photosynthesis, plants can make their own food from carbon dioxide and water in the existence of sunlight and chlorophyll. In this process, oxygen is released and glucose is produced. Glucose is either stored or converted into starch or it is used for respiration.

9. Answer: (а) CO₂

Explanation: The raw materials of photosynthesis, water and carbon dioxide, enter the cells of the leaf. Oxygen, a by-product of photosynthesis, and water vapor exit the leaf. 

10. Answer: (b) Cuscuta

Explanation: Nepenthes - It is an insectivorous plant.

Rhizobium - Rod shaped, aerobic, Nitrogen fixing bacterium.

Cuscuta - complete stem parasite.

Lichens - Special type of plants formed by the association of algae and fungi.

11. Answer: (a) Fungi

Explanation: Fungi are saprotrophs. Saprophytes are the organisms which grow and depend on dead and decaying matter.

12. Answer: (a) Pitcher plant

Explanation: A pitcher plant is a carnivorous plant (also called as Insectivorous plant). Carnivorous plants are plants that eat insects and other small animals. Carnivorous plants grow in soil that has little nitrogen. All living things must have nitrogen.

13. Answer: (a) Rhizobium 

Explanation: Leguminous plants contain Rhizobium bacteria in their root nodules. These bacteria have the ability to convert atmospheric nitrogen into a plant-usable form of nitrogen.

14. Answer: (a) Oxygen

Explanation: Oxygen is released during the process of photosynthesis.

15. Answer: (b) They live on decaying organic matter

Explanation: A saprophyte or saprotroph is an organism that gets its nutrition and energy from dead and decaying organic matter. These may be decaying parts of plants or animals. This means that saprophytes are heterotrophs. They are consumers in the food chain. This is a phenomenon observed in Fungi.

16. Answer: (a) blue-black colour

Explanation: Starch is the storage food reserve of a plant which is mainly present in the leaf. When its presence is tested by Iodine, It forms a blue- black color complex of starch Iodide. The iodine/starch complex has energy level spacings that are just so for absorbing visible light giving the complex its intense blue color.

17. Answer: (b) Algae

Explanation: Algae, along with plants and some bacteria and fungi, are autotrophs. Autotrophs are the producers in the food chain, meaning they create their own nutrients and energy. Kelp, like most autotrophs, creates energy through a process called photosynthesis.

18. Answer: (b) grows in soils which lacks nitrogen

Explanation: Pitcher plants trap insects in its modified trap-like organ to fulfill its requirements of Nitrogen and other nutrients as it grows in soil that lacks nitrogen. The dead insect inside its trap provides such nutrients required for normal functioning of the plant.

19. Answer: (c) saprophytic

Explanation: The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is saprophytic. These are all fungi.

20. Answer: (d) symbiosis

Explanation: When two organisms (such as fungus and algae) live as one and also help each other to survive, then this association is termed as symbiosis.

21. Answer: (a) hosts

Explanation: Parasitic nutrition or parasitism is a mode of heterotrophic nutrition where an organism (known as a parasite) lives on the body surface or inside the body of another living organism (known as a host). The parasite obtains nutrition directly from the body of the host. 

22. Answer: (b) Thylakoids

Explanation: Chlorophyll is a pigment necessary for photosynthesis where it helps plants to absorb energy from light. It is located in the thylakoid membranes of the chloroplasts.Thylakoids are membrane-bound compartments present inside chloroplasts.

23. Answer: (d) Leaves

Explanation: Atmospheric carbon dioxide enters plants mainly through the pores in the leaves called stomata during photosynthesis.

24. Answer: (a) Guard cell

Explanation: A pair of guard cells surrounds each stoma, and these cells control the opening and closing of the stomatal pore between them.

25. Answer: (a) Leguminous

Explanation: Leguminous plant are obtained most of the pulses.

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