MCQ Questions for Class 7 Science: Ch 1 Nutrition in Plants

MCQ Questions for Class 7 Science: Ch 1 Nutrition in Plants

1. Which bacteria convert atmospheric nitrogen into soluble form?
(a) Rhizobium
(b) Spirillum
(c) Lactobacillus
(d) Methanogen
► (a) Rhizobium

2. Chlorophyll is present inside the
(a) Stroma
(b) Thylakoids
(c) hypodermis
(d) granna
► (b) Thylakoids

3. How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?
(a) By giving off carbon dioxide and absorbing oxygen.
(b) By giving off oxygen and absorbing carbon dioxide.
(c) By releasing oxygen and carbon dioxide.
(d) By absorbing oxygen and carbon dioxide.
► (b) By giving off oxygen and absorbing carbon dioxide.

4. Which structure in a green plant controls the opening and closing of stomata?
(a) Guard cell
(b) Mesophyll
(c) Phloem
(d) Xylem
► (a) Guard cell

5. Chlorophyll is found in oval-shaped structures called as
(a) stomata
(b) stoma
(c) chloroplast
(d) centrioles
► (c) chloroplast

6. Ultimate source of energy for all living organisms is
(a) Planets
(b) Moon
(c) Sun
(d) Coal
► (c) Sun

7. Which of the following component of food provide us energy
(a) Carbohydrates
(b) Proteins
(c) Minerals
(d) Vitamins
► (a) Carbohydrates

8. Algae and fungi live together in
(a) Shrubs
(b) Herbs
(c) Lichen
(d) Pinus
► (c) Lichen

9. The byproduct of photosynthesis is
(a) Energy
(b) Water
(c) Oxygen
(d) Organic compounds
► (c) Oxygen

10. Which of the following statements is true about croton plants?
(a) Croton plants do not contain chlorophyll.
(b) Croton plants are dark red in colour. Hence they depend on other plants for food.
(c) Croton plants have chlorophyll but it is hidden by dark red colour pigments.
(d) Croton plants are parasites.
► (c) Croton plants have chlorophyll but it is hidden by dark red colour pigments.

11. What is the role of the bacteria in leguminous plants?
(a) Convert oxides of nitrogen into soil nitrates.
(b) Convert atmospheric nitrogen gas into soil nitrates.
(c) Convert soil nitrates into gaseous nitrogen.
(d) Convert plant proteins into ammonia.
► (b) Convert atmospheric nitrogen gas into soil nitrates.

12. Conduction of inorganic materials in plants occur mainly through minerals absorbed by roots move to the leaf through
(a) Xylem
(b) Phloem
(c) Sieve tube
(d) None
► (a) Xylem

13. Animals which eat the flesh of other animals are called
(a) Carnivores
(b) Insectivores
(c) Herbivores
(d) Omnivores
► (a) Carnivores

14. Herbivores are _________ eating animals.
(a) Symbiotic
(b) Flesh
(c) Insect
(d) Plants
► (d) Plants

15. Which one is an herbivorous organism?
(a) Cow
(b) Tiger
(c) Crow
(d) Dog
► (a) Cow

16. Plants make their own food by the process of
(a) Excretion
(b) Transportation
(c) Photosynthesis
(d) Respiration
► (c) Photosynthesis

17. Which of the following is not an insectivorous plant ?
(a) Monotropa
(b) Drosera
(c) Utricularia
(d) Nepenthes
► (a) Monotropa

18. Which of the following, one element has not been proven to be essential in plants
(a) Potassium
(b) Sodium
(c) Zinc
(d) Iron
► (b) Sodium

19. What is the principal source of energy input to biological systems?
(a) Carbohydrates from plants.
(b) Light from the sun.
(c) Nutrients from the soil.
(d) Oxygen from the air.
► (b) Light from the sun.

20. Components of food are called
(a) Nutrients
(b) Food
(c) Substrate
(d) Enzyme
► (a) Nutrients

21. The small pores present on the leaves are called
(a) Lenticels
(b) Guard cell
(c) Stomata
(d) Epidermis
► (c) Stomata

22. Which one is saprophytic organism?
(a) Algae
(b) Mushroom
(c) Cuscuta
(d) Mango
► (b) Mushroom

23. Which part of the leaf controls the rate of loss of water to the air?
(a) Midrib                                 
(b) Stomata             
(c) Vascular bundles
(d) Veins
► (b) Stomata             

24. Organism that live and derive food from others are called
(a) Autotrophs
(b) Host
(c) Parasite
(d) Carnivores
► (c) Parasite
Previous Post Next Post
X
Free Study Rankers App Download Now