Life Process MCQ Science Class 10

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MCQ Questions for Class 10 Science Life Process with Answers

Choose the correct option:-

1.The green colour of plants is due to the presence of :

  1. Chlorophyll
  2. Carotene
  3. Xanthophyll
  4. Starch 

Ans-(a) Chlorophyll

2. During respiration exchange of gases take place in:

  1. Trachea and larynx
  2. Alveoli of lungs 
  3. Alveoli and throat 
  4. Throat and larynx 

Ans-(b) Alveoli of lungs

3. In which of the following vertebrate groups, heart does not pump oxygenated blood to different parts of the body? 

  1. Pisces and amphibians 
  2. Amphibians and reptiles 
  3. Amphibians only 
  4. Pisces only 

Ans-(d) Pisces only 

4. Blood from superior vena cava flows into:

  1. Right atrium 
  2. Right ventricle 
  3. Left atrium 
  4. Left ventricle 

Ans-(a) Right atrium 

5. Which is the first enzyme to mix with food in the digestive tract? 

  1. Pepsin 
  2. Cellulose 
  3. Amylase 
  4. Trypsin

Ans-(c) Amylase

6. In which part of the alimentary canal food is finally digested? 

  1. Stomach 
  2. Mouth cavity 
  3. Large intestine 
  4. Small intestine 

Ans-(d) Small intestine 

7. Choose the correct path of urine in our body. 

  1. Kidney—>ureter—>urethra—>urinary bladder 
  2. Kidney—>urinary bladder—>urethra—>ureter 
  3. Kidney—>ureter—>urinary bladder—>urethra
  4. Urinary bladder—>kidney—>ureter—>urethra 

Ans-(c) Kidney—>ureter—>urinary bladder —>urethra

8. The internal(cellular) energy reserve in autotrops is-

  1. Glycogen
  2. Protein
  3. Starch 
  4. Fatty acid 

Ans-(c) Starch

9. If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected? 

  1. Proteins breaking down into amino acids 
  2. Starch breaking down into sugars
  3. Fats breaking down into fatty acids and glycerol 
  4. Absorption of vitamins 

Ans-(b) Starch breaking down into sugars

10. Lack of oxygen in muscles often leads to cramps among cricketers. This results due to:

  1. Conversion of pyruvate to ethanol 
  2. Conversion of pyruvate to glucose 
  3. Non-conversion of glucose to pyruvate 
  4. Conversion of pyruvate to lactic acid 

Ans-(d) Conversion of pyruvate to lactic acid

11. The opening and closing of the stomatal pores depends upon :

  1. Oxygen 
  2. Temperature 
  3. Water in guard cells 
  4. Concentration of CO2 in stomata

Ans-(c) Water in guard cells

12. The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one:

  1. Pepsin 
  2. Mucus
  3. Salivary amylase 
  4. Bile

Ans-(b) Mucus

13. The process by which Amoeba obtains food is called:

  1. Phagocytosis 
  2. Assimilation 
  3. Diffusion 
  4. Absorption 

Ans-(a) Phagocytosis 

14. The enzymes Pepsin and trypsin are secreted respectively by:-

  1. Stomach and pancreas
  2. Salivary gland and stomach 
  3. Liver and pancreas 
  4. Liver and salivary gland 

Ans-(a) Stomach and pancreas

15. Which of the following help in  protecting the inner lining of the stomach from the harmful effect of hydrochloric acid? 

  1. Mucus 
  2. Pepsin
  3. Trypsin
  4. Bile

Ans-(a) Mucus 

16. The vein which brings clean blood from the lungs into the heart is known as:-

  1. Pulmonary vein
  2. Hepatic vein
  3. Superior vena cava
  4. Pulmonary artery 

Ans-(a) Pulmonary vein

17. Movement of the synthesized product from the leaves to the roots and other part of a plants body take place through the phloem. This process is known as:

  1. Translocation
  2. Transpiration
  3. Transportation
  4. Excretion

Ans-(a) Translocation 

18. During deficiency of oxygen in tissues of human body beings, pyruvic acid is converted into lactic acid in the :-

  1. Cytoplasm
  2. Chloroplast
  3. Mitochondria
  4. Golgi body

Ans-(a) Cytoplasm

19. Which among the following procedures is used for cleaning the blood of a person by separating the waste substance from it?

  1. Kidney transplant
  2. Blood transfusion
  3. Dialysis
  4. Hydrolysis

Ans-(c) Dialysis

20. Which among the following is necessary to carry out the blood coagulation in a cut or wound?

  1. White blood cells
  2. Blood plasma
  3. Platelets
  4. Red blood cells

Ans-(c) Platelets

21. Arteries and veins are connected by a network of extremely narrow tubes called –

  1. Sieve tubes
  2. Capillaries
  3. Vena cava
  4. Valves

Ans-(b) Capillaries

22. In which mode of the nutrition an organism derives its food from the body of another living organism without killing it?

  1. Saprotrophic nutrition
  2. Parasitic nutrition
  3. Holozoic nutrition
  4. Autotrophic nutrition

Ans-(b) Parasitic nutrition

23. The mode of nutrition found in fungi is:-

  1. Parasitic nutrition
  2. Holozoic nutrition
  3. Autotrophic nutrition
  4. Saprotrophic nutrition

Ans-(d) Saprotrophic nutrition

24. The site of photosynthesis in the cells of a leaf is:-

  1. Chloroplast
  2. Mitochondria
  3. Cytoplasm
  4. Protoplasm

Ans-(a) Chloroplast

25. In Amoeba,food is digested in the?

  1. Food vacuole
  2. Mitochondria
  3. Pseudopodia
  4. Chloroplast

Ans-(a) Food vacuole

26. Which region of the alimentary canal absorbs the digested food?

  1. Stomach
  2. Small intestine
  3. Large intestine
  4. Liver

Ans-(b) Small intestine

27. The contraction and expansion movement of the walls of the food pipe is called:-

  1. Translocation
  2. Transpiration
  3. Peristaltic movement
  4. Digestion

Ans-(c) Peristaltic movement

28. What are the products obtained by anaerobic respiration in plants?

  1. Lactic acid + Energy
  2. Carbon dioxide + Water + Energy
  3. Ethanol + Carbon dioxide + Energy
  4. Pyruvate

Ans-(c) Ethanol + Carbon dioxide + Energy

29. Name the pores in a leaf through which respiratory exchange of gases takes place :-

  1. Lenticels
  2. Vacuoles
  3. Xylem
  4. Stomata

Ans-(d) Stomata

30. The respiratory pigment in human beings is :-

  1. Carotene
  2. Chlorophyll
  3. Haemoglobin
  4. Mitochondria

Ans-(c) Haemoglobin

31. Which plant tissue transports water and minerals from the roots to the leaf ?

  1. Xylem
  2. Phloem
  3. Parenchyma
  4. Collenchyma

Ans-(a) Xylem

32. A blood vessels which pumps the blood from the heart to the entire body is called:-

  1. Artery
  2. Capillary
  3. Vein
  4. Haemoglobin

Ans-(a) Artery

33. Name a circulatory fluid in the human body other than blood

  1. Lymph
  2. Plasma
  3. Platelets
  4. RBC

Ans-(c) Lymph

34. Name the tube which connects the kidney to the urinary bladder-

  1. Urethra
  2. Nephron
  3. Tubule
  4. Ureter

Ans-(d) Ureter

35. Where is the dirty blood in our body filtered?

  1. Hearts
  2. Lungs
  3. Kidneys
  4. Ureter

Ans-(c) Kidneys

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