Digestion and Excretion MCQ Questions with Answers: Biology Quiz

Digestion and Excretion MCQ Questions with Answers

Question 1. Cellulose and starch both are made up of______.

(A) (+) – galactose

(B) (+) – glucose

(C) (–) – fructose

(D) Both (A) and (B)

View Answer
(D) Both (A) and (B)

Question 2. The process by which blood is purified in human body is called_______.

(A) Paralysis

(B) Osmosis

(C) Haemolysis

(D) Dialysis

View Answer
(D) Dialysis 

Question 3. In human body most of the digestive process, takes place in_______.

(A) Stomach

(B) Small intestine

(C) Large intestine

(D) Pancreas

View Answer
(B) Small intestine

Question 4. The saliva helps in the digestion of_______.

(A) Fat

(B) Fibres

(C) Proteins

(D) Starch

View Answer
(D) Starch 

Question 5. Which of the following is correct?

(A) All the blood in the body is made through the kidneys

(B) All the blood in the body is filtered through the kidneys

(C) All the blood in the body passes through the kidneys

(D) All the blood in the body isabsorbed through the kidneys

View Answer
(B) All the blood in the body is filtered through the kidneys

Question 6. ‘Dialysis’ is related to______.

(A) Brain

(B) Eyes

(C) Kidney

(D) Liver

View Answer
(C) Kidney

Question 7. Where is urea separated from the blood?

(A) Kidney

(B) Spleen

(C) Stomach

(D) Intestine

View Answer
(A) Kidney

Question 8. The kidneys in human beings are a part of system for______.

(A) Respiration

(B) Excretion

(C) Transportation

(D) Nutrition

View Answer
(B) Excretion

Question 9. Urea is______.

(A) An Endergonic compound

(B) A plant hormone

(C) A nitrogen containing inorganic compound

(D) A nitrogen containing organic compound

View Answer
(D) A nitrogen containing organic compound

Question 10. The average blood flow through kidneys per minute is______.

(A) 500 cc

(B) 200 cc

(C) 1200 cc

(D) 1000 cc

View Answer
(C) 1200 cc

Question 11. The dialyzer is used for the work of______.

(A) Liver

(B) Lungs

(C) Kidney

(D) Heart

View Answer
(C) Kidney

Question 12. When kidneys fail to function, there is accumulation of______.

(A) Nitrogenous waste products in the blood

(B) Sugar in the blood

(C) Proteins in the body

(D) Fats in the body

View Answer
(A) Nitrogenous waste products in the blood

Question 13. Which of the following is not the normal function of the human kidney?

(A) Secretion of several hormones

(B) Filter out urea

(C) Regulation of sugar level in the blood

(D) Regulation of water level in the blood

View Answer
(C) Regulation of sugar level in the blood

Question 14. The major chemical compound found in human kidney stones is______.

(A) Calcium sulphate

(B) Calcium oxalate

(C) Calcium carbonate

(D) Urea

View Answer
(B) Calcium oxalate

Question 15. What amongst the following is responsible for the formation of stone in the human kidney?

(A) Sodium benzoate

(B) Sodium acetate

(C) Calcium oxalate

(D) Calcium acetate

View Answer
(C) Calcium oxalate

Question 16. The stones present in the gall bladder affect the digestion of_______.

(A) Nucleic acid

(B) Carbohydrate

(C) Fat

(D) Protein

View Answer
(C) Fat

Question 17. Enzyme is a______.

(A) Virus

(B) Bio-catalyst

(C) Bacterium

(D) Vitamin

View Answer
(B) Bio-catalyst

Question 18. Enzymes are basically______.

(A) Vitamins

(B) Proteins

(C) Sugars

(D) Fats

View Answer
(B) Proteins 

Question 19. Which enzyme can catalyze the conversion of glucose to ethanol?

(A) Diastase

(B) Maltase

(C) Invertase

(D) Zymase

View Answer
(D) Zymase 

Question 20. Substances that are responsible for catalysing chemical reactions in living systems are______.

(A) Proteins

(B) Enzymes

(C) DNA

(D) Bacteria

View Answer
(B) Enzymes 

Question 21. Production of which one of the following is a function of the liver?

(A) Hydrochloric acid

(B) Mucus

(C) Urea

(D) Lipase

View Answer
(C) Urea

Question 22. Which one of the following is not a digestive enzyme in the human system?

(A) Pepsin

(B) Ptyalin

(C) Gastrin

(D) Trypsin

View Answer
(C) Gastrin

Question 23. An enzyme that helps in the digestion of protein is_______.

(A) Protease

(B) Trypsin

(C) Sulfatase

(D) Urease

View Answer
(B) Trypsin 

Question 24. Enzyme that is formed by the hydrolysis of starch to glucose is______.

(A) Anhydrase

(B) Dehydrogenase

(C) Amylase

(D) Invertase

View Answer
(C) Amylase

Question 25. Which of the following changes is catalyzed by the enzyme trypsin?

(A) Starch to glucose

(B) Proteins to amino acids

(C) Proteins to peptides

(D) Proteins to peptones

View Answer
(B) Proteins to amino acids

Question 26. In the human body, which structure is the appendix attached to?

(A) The stomach

(B) The gall bladder

(C) The small intestine

(D) The large intestine

View Answer
(D) The large intestine

Question 27. Which one of the following is the correct sequence in the order decreasing the length of the three structural part given below, of the small intestine in the human body?

(A) Ileum – Jejunum – Duodenum

(B) Jejunum – Ileum – Duodenum

(C) Ileum – Duodenum – Jejunum

(D) Jejunum – Duodenum – Ileum

View Answer
(A) Ileum – Jejunum – Duodenum

Question 28. Which of the following foods will provide the nutrient for the growth of new tissues in the human body?

(A) Sweets

(B) Cheese

(C) Vegetables

(D) Fruit

View Answer
(B) Cheese 

Question 29. Nutraceuticals are products which have______.

(A) Nutrient and medicinal effect

(B) Nutrient and toxic effect

(C) Nutrients protein and fatty acids

(D) Nutrients vitamin and minerals

View Answer
(A) Nutrient and medicinal effect

Question 30. Identify the correct pair of enzyme and its function.

(A) Succinic dehydrogenase – Lysosomal marker enzyme, hydrolyses metabolites

(B) Acrosin – Cortical granules of ovum secrete it to prevent polyspermic fertilization

(C) E. coli restriction endonuclease – Cuts DNA at specific places

(D) Acid phosphatase – Mitochondrial marker enzymes related to oxidative functions

View Answer
(C) E. coli restriction endonucleaseII – Cuts DNA at specific places

Question 31. With reference to the work of human kidney, consider the following statements.

  1. After the waste is removed in the kidney, the cleaner blood is sent back through renal artery.
  2. From Bowman’s capsule, the filtered liquid passes through tiny tubes where much of the glucose is reabsorbed and sent back to the blood in the renal vein.

Which of these statements is/are correct?

(A) Neither 1 nor 2

(B) Both 1 and 2

(C) Only 2

(D) Only 1

View Answer
(B) Both 1 and 2

Question 32.

  • Assertion (A): In human body, the liver has an important role in fat digestion.
  • Reason (R): Liver produces two important fat-digesting enzymes.

(A) (A) is false, but (R) is true

(B) (A) is true, but (R) is false

(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

(D) Both (A) and (R) are true and (R) is the correct explanation of (A)

View Answer
(B) (A) is true, but (R) is false

Question 33. Given below are two statements.

  • Assertion (A): Human body is incapable of digesting cellulose.
  • Reason (R): Starch degrading enzyme, diastase, is found in human body.

Choose the correct answer from the code given below.

(A) (A) is false, but (R) is true

(B) (A) is true, but (R) is false

(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

(D) Both (A) and (R) are true and (R) is the correct explanation of (A)

View Answer
(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

Question 34. Digestion of Lipids takes place in the presence of some of the following.

  1. Bile acids
  2. Lipases
  3. Pepsin

(A) 1, 2 and 3 are correct

(B) Only 1 and 2 are correct

(C) Only 1 and 3 are correct

(D) Only 1 is correct

View Answer
(B) Only 1 and 2 are correct

Question 35.

  • Assertion (A): All the proteins in our food are digested in small intestine only.
  • Reason (R): The protein digesting enzyme from the pancreas are released into the small intestine.

(A) (A) is false, but (R) is true

(B) (A) is true, but (R) is false

(C) Both (A) and (R) are true, but (R) is not the correct explanation of (A)

(D) Both (A) and (R) are true and (R) is the correct explanation of (A)

View Answer
(A) (A) is false, but (R) is true

Question 36. Consider the following statements about probiotic food.

  1. Probiotic food contains live bacteria which are considered beneficial to humans.
  2. Probiotic food helps in maintaining gut flora.

Which of the statements given above is/are correct?

(A) Neither 1 nor 2

(B) Both 1 and 2

(C) Only 2

(D) Only 1

View Answer
(B) Both 1 and 2