Q. 1 From which structure, the free oxygen gas produced
during photosynthesis is released?
(a) Epidermis (b) Stomata
(c) Cortex (d) Guard cell
Q.2 What is the mode of nutrition in fungi?
(a) Autotrophic (b)Heterotrophic
(c) Saprophytic (d) Parasitic
Ans. C
Q.3 What is the final product of photosynthesis?
(a) Protein (b) Fat
(c) Starch (d) Mineral salt
Ans. C
Q.4 Which of the following is responsible for the transport of water and minerals from roots to aerial parts of the
plant?
(a) Xylem (b) Phloem
(c) Cortex (d) Both (a) and (b)
Ans. D
Q.5 Which of the following help in protecting the inner lining of the stomach from the harmful effect of hydrochloric acid?
a) Mucus b) Pepsin
c) Trypsin d) Bile
Answer: (a) Mucus
Explanation: Mucus is a viscous secretion that protects the inner lining of the stomach from the action of HCl.
Q. 6 The enzymes contained in pancreatic juices help in the digestion of:
a) Fats and carbohydrates
b) Proteins and fats
c) Proteins and carbohydrates
d) Proteins, fats and carbohydrates
Answer: (d) Proteins, fats and carbohydrates
Explanation: The pancreas contains all kinds of enzymes that can digest proteins, fats and carbohydrates.
Q. 7 Raw materials required in the autotrophic mode of nutrition involves:
i. Carbon dioxide and water
ii. Chlorophyll
iii. Nitrogen
iv. Sunlight
a) (i), (ii) and (iii)
b) (i) and (ii)
c) (i), (ii) and (iv)
d) All (i), (ii), (iii) and (iv)Answer: (c) (i), (ii) and (iv)
Explanation: Autotrophic mode of nutrition involves the use of sunlight, chlorophyll, carbon dioxide and water to produce starch.
Q. 8 Among the following choose the correct option which includes the organisms that have a holozoic mode of nutrition:
a) Plasmodium and Amoeba
b) Parakeet and Amoeba
c) Paramecium and Plasmodium
d) Paramecium and Parasite
Answer: (b) Parakeet and Amoeba
Explanation: Holozoic nutrition involves the ingestion of organic food particles and later its assimilation for the purpose of supplying energy to the whole body.
Q.9 The enzymes pepsin and trypsin are secreted respectively by
a) Stomach and pancreas
b) Salivary gland and stomach
c) Liver and pancreas
d) Liver and salivary gland
Answer: (a) Stomach and pancreas
Explanation: Stomach secretes the enzyme pepsin and pancreas produces trypsin. Both of them breakdown protein.
Q. 10 Which of the following is not a digestive enzyme contained in the pancreatic juice?
i lipase
ii. Hydrochloric acid
iii. Mucus
iv. Trypsin
a) (i) and (ii)
b) (i) and (iv)
c) (ii) and (iii)
d) (i) and (iii)Ans. c)
Explanation: The enzymes lipase and trypsin are present in the pancreatic juice that breakdown emulsified fats and degrade proteins respectively.
Q. 11. Which is the correct sequence of body parts in the human alimentary canal?
(a) Mouth → stomach → small intestine → large intestine → oesophagus
(b) Mouth → oesophagus → stomach → small intestine → large intestine
(c) Mouth → stomach → oesophagus → smallintestine → large intestine
(d) Mouth → oesophagus → stomach → large intestine → small intestine
Ans. d)
Q. 12 The exit of unabsorbed food material is regu-lated by
(a) liver
(b) anus
(c) small intestine
(d) anal sphincter
Ans. d)
Q. 13 When a few drops of iodine solution are added to rice water, the solution turns blue- black in colour. This indicates that rice water contains:
(a) fats
(b) complex proteins
(c) starch
(d) simple proteins
Ans. c)
Q. 14. The contraction and expansion movement of the walls of the food pipe is called:
(a) translocation
(b) transpiration
(c) peristaltic movement
(d) digestion
Ana. C
Q 15. Which region of the alimentary canal absorbs the digested food?
(a) Stomach.
(b) Small intestine.
Q. 16. Which of the following events in the mouth cavity will be affected if salivary amylase is lacking in the saliva?
(a) Starch breaking down into sugars.
(b) Proteins breaking down into amino acids.
(c) Absorption of vitamins.
(d) Fats breaking down into fatty acids and glycerol.
Ans. A
Q. 17. In amoeba, food is digested in the:
(a) food vacuole
(b) mitochondria
(c) pseudopodia
(d) chloroplast
Ans. A
Q. 18. The site of photosynthesis in the cells of a leaf is
(a) chloroplast
(b) mitochondria
(c) cytoplasm
(d) protoplasm
Ans. A
Q. 19. The mode of nutrition found in fungi is:
(a) Parasitic nutrition
(b) Holozoic nutrition
(c) Autotrophic nutrition
(d) Saprotrophic nutrition
Ans. D
Q. 20. In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?
(a) Saprotrophic nutrition
(b) Parasitic nutrition
(c) Holozoic nutrition
(d) Autotrophic nutrition
Ans. B
Q. 21 The autotrophic mode of nutrition requires
(a) carbon dioxide and water.
(b) chlorophyll.
(c) sunlight.
(d) all of the above.
Ans. D