MCQ Questions for Class 10 Science Chapter 5, “Life Processes,” offers a valuable learning aid for students. These multiple-choice questions, accompanied by answers, delve into the fundamental aspects of life processes, including nutrition, respiration, and excretion. They provide an effective means for Class 10 students to assess their understanding and prepare for examinations. With clear explanations and correct answers, these MCQs facilitate a deeper comprehension of vital biological concepts, making the study of life processes engaging and informative.
MCQ Questions for Class 10 Science Chapter-5 Life Process with Answers
Choose the correct option:-
1.The green colour of plants is due to the presence of :
- Chlorophyll
- Carotene
- Xanthophyll
- Starch
Ans-(a) Chlorophyll
2. During respiration exchange of gases take place in:
- Trachea and larynx
- Alveoli of lungs
- Alveoli and throat
- 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?
- Pisces and amphibians
- Amphibians and reptiles
- Amphibians only
- Pisces only
Ans-(d) Pisces only
4. Blood from superior vena cava flows into:
- Right atrium
- Right ventricle
- Left atrium
- Left ventricle
Ans-(a) Right atrium
5. Which is the first enzyme to mix with food in the digestive tract?
- Pepsin
- Cellulose
- Amylase
- Trypsin
Ans-(c) Amylase
6. In which part of the alimentary canal food is finally digested?
- Stomach
- Mouth cavity
- Large intestine
- Small intestine
Ans-(d) Small intestine
7. Choose the correct path of urine in our body.
- Kidney—>ureter—>urethra—>urinary bladder
- Kidney—>urinary bladder—>urethra—>ureter
- Kidney—>ureter—>urinary bladder—>urethra
- Urinary bladder—>kidney—>ureter—>urethra
Ans-(c) Kidney—>ureter—>urinary bladder —>urethra
8. The internal(cellular) energy reserve in autotrops is-
- Glycogen
- Protein
- Starch
- 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?
- Proteins breaking down into amino acids
- Starch breaking down into sugars
- Fats breaking down into fatty acids and glycerol
- 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:
- Conversion of pyruvate to ethanol
- Conversion of pyruvate to glucose
- Non-conversion of glucose to pyruvate
- 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 :
- Oxygen
- Temperature
- Water in guard cells
- 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:
- Pepsin
- Mucus
- Salivary amylase
- Bile
Ans-(b) Mucus
13. The process by which Amoeba obtains food is called:
- Phagocytosis
- Assimilation
- Diffusion
- Absorption
Ans-(a) Phagocytosis
14. The enzymes Pepsin and trypsin are secreted respectively by:-
- Stomach and pancreas
- Salivary gland and stomach
- Liver and pancreas
- 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?
- Mucus
- Pepsin
- Trypsin
- Bile
Ans-(a) Mucus
16. The vein which brings clean blood from the lungs into the heart is known as:-
- Pulmonary vein
- Hepatic vein
- Superior vena cava
- 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:
- Translocation
- Transpiration
- Transportation
- Excretion
Ans-(a) Translocation
18. During deficiency of oxygen in tissues of human body beings, pyruvic acid is converted into lactic acid in the :-
- Cytoplasm
- Chloroplast
- Mitochondria
- 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?
- Kidney transplant
- Blood transfusion
- Dialysis
- Hydrolysis
Ans-(c) Dialysis
20. Which among the following is necessary to carry out the blood coagulation in a cut or wound?
- White blood cells
- Blood plasma
- Platelets
- Red blood cells
Ans-(c) Platelets
21. Arteries and veins are connected by a network of extremely narrow tubes called –
- Sieve tubes
- Capillaries
- Vena cava
- 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?
- Saprotrophic nutrition
- Parasitic nutrition
- Holozoic nutrition
- Autotrophic nutrition
Ans-(b) Parasitic nutrition
23. The mode of nutrition found in fungi is:-
- Parasitic nutrition
- Holozoic nutrition
- Autotrophic nutrition
- Saprotrophic nutrition
Ans-(d) Saprotrophic nutrition
24. The site of photosynthesis in the cells of a leaf is:-
- Chloroplast
- Mitochondria
- Cytoplasm
- Protoplasm
Ans-(a) Chloroplast
25. In Amoeba,food is digested in the?
- Food vacuole
- Mitochondria
- Pseudopodia
- Chloroplast
Ans-(a) Food vacuole
26. Which region of the alimentary canal absorbs the digested food?
- Stomach
- Small intestine
- Large intestine
- Liver
Ans-(b) Small intestine
27. The contraction and expansion movement of the walls of the food pipe is called:-
- Translocation
- Transpiration
- Peristaltic movement
- Digestion
Ans-(c) Peristaltic movement
28. What are the products obtained by anaerobic respiration in plants?
- Lactic acid + Energy
- Carbon dioxide + Water + Energy
- Ethanol + Carbon dioxide + Energy
- Pyruvate
Ans-(c) Ethanol + Carbon dioxide + Energy
29. Name the pores in a leaf through which respiratory exchange of gases takes place :-
- Lenticels
- Vacuoles
- Xylem
- Stomata
Ans-(d) Stomata
30. The respiratory pigment in human beings is :-
- Carotene
- Chlorophyll
- Haemoglobin
- Mitochondria
Ans-(c) Haemoglobin
31. Which plant tissue transports water and minerals from the roots to the leaf ?
- Xylem
- Phloem
- Parenchyma
- Collenchyma
Ans-(a) Xylem
32. A blood vessels which pumps the blood from the heart to the entire body is called:-
- Artery
- Capillary
- Vein
- Haemoglobin
Ans-(a) Artery
33. Name a circulatory fluid in the human body other than blood
- Lymph
- Plasma
- Platelets
- RBC
Ans-(c) Lymph
34. Name the tube which connects the kidney to the urinary bladder-
- Urethra
- Nephron
- Tubule
- Ureter
Ans-(d) Ureter
35. Where is the dirty blood in our body filtered?
- Hearts
- Lungs
- Kidneys
- Ureter
Ans-(c) Kidneys