Human Digestive System MCQ – UPSC & Other Exams PYQs

Human Digestive System MCQ
Human Digestive System MCQ

Human Digestive System MCQ – UPSC & Other Exams


UPSC – Human Digestive System MCQ


Q1. With reference to normal human beings, consider the following statements:

1. In response to the presence of HCI, secretin is produced from the duodenum.

2. Enterogastrone is produced in the small intestine in response to the presence of fatty acids.

Which of these statements is / are correct?

(a) Only 1

(b) Only 2

(c) Both 1 and 2

(d) Neither 1 nor 2

I.A.S. (Pre) 2003

Ans

(c) Both 1 and 2

2. Match List-I with List-II and select the correct answer by using the codes given below:

List I List II

A. Vitamin 1. Pepsin

B. Enzyme 2. Carotene

C. Hormone 3. Keratin

D. Protein 4. Testosterone/Progesterone

Code:

A B C D

(a) 1 2 3 4

(b) 2 1 4 3

(c) 2 1 3 4

(d) 1 2 4 3

I.A.S. (Pre) 1996

Ans

(b) 2 1 4 3

3. Match List-I with List-II and select the correct answer using the codes given below the lists :

List-I List-II

A. Ptyalin 1. Converts angiotensinogen in blood into angiotensin

B. Pepsin 2. Digests starch

C. Renin 3. Digests proteins

D. Oxytocin 4. Hydrolyses fats

 5. Induces contraction of smooth muscles

Code:

A B C D

(a) 2 3 1 5

(b) 3 4 2 5

(c) 2 3 5 1

(d) 3 1 2 4

I.A.S. (Pre) 2001

Ans

(a) 2 3 1 5

4. 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) Jejunum – Duodenum – Ileum

(b) Ileum – Duodenum – Jejunum

(c) Jejunum – Ileum – Duodenum

(d) Ileum – Jejunum – Duodenum

I.A.S. (Pre) 2007

Ans

(d) Ileum – Jejunum – Duodenum

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

(a) The large intestine

(b) The small intestine

(c) The gall bladder

(d) The stomach

I.A.S. (Pre) 2007

Ans

(a) The large intestine

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

(a) Trypsin

(b) Gastrin

(c) Ptyalin

(d) Pepsin

I.A.S. (Pre) 2007

Ans

(b) Gastrin

7. 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.

Code:

(a) Both (A) and (R) are individually true and (R) is the correct explanation of (A).

(b) Both (A) and (R) are individually true, but (R) is not a correct explanation of (A).

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

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

I.A.S. (Pre) 2005

Ans

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

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

(a) Lipase

(b) Urea

(c) Mucus

(d) Hydrochloric acid

I.A.S. (Pre) 2007

Ans

(b) Urea

9. Assertion (A): In human body, the liver has an important role in fat digestion.

Reason (R): Liver produces two important fat digesting enzymes.

Code:

(a) Both (A) and (R) are individually true and (R) is the correct explanation of (A).

(b) Both (A) and (R) are individually true, but (R) is not a correct explanation of (A).

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

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

I.A.S. (Pre) 2008

Ans

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


PCS & Other Exams – Human Digestive System MCQ


1. In human body most of the digestive process, takes place in –

(a) Pancreas

(b) Large intestine

(c) Small intestine

(d) Stomach

U.P.P.C.S. (Pre) 1991

Ans

(c) Small intestine

2. Which of the following are not the tastes of the tongue?

1. Sweet

2. Bitter

3. Salty

4. Spicy

5. Umami

6. Sour

7. Pungent

Select the correct answer using the codes given below.

(a) 2, 5 and 7

(b) 1, 3 and 4

(c) 4 and 7

(d) 3 and 6

69th B.P.S.C. (Pre) 2023

Ans

(c) 4 and 7

3. The sensitive area of the human tongue to bitterness is:

(a) Tip

(b) Middle part

(c) Posterior part

(d) Edge

(e) None of the above / More than one of the above

66th B.P.S.C. (Pre) 2020

Ans

(c) Posterior part

4. In the buccal cavity of human being digestion of which one of the following get started?

(a) Protein

(b) Fat

(c) Carbohydrate

(d) None of the above

M.P.P.C.S. (Pre) 2019

Ans

(c) Carbohydrate

5. The saliva helps in the digestion of –

(a) Starch

(b) Proteins

(c) Fibres

(d) Fat

R.A.S./R.T.S.(Pre) 2012

Ans

(a) Starch

6. Which of the following is digested with the help of saliva?

(a) Protein

(b) Starch

(c) Fibre

(d) None of the above

Jharkhand P.C.S. (Pre) 2013

Ans

(b) Starch

7. Enzyme involved in the hydrolysis of starch to glucose is-

(a) Invertase

(b) Amylase

(c) Dehydrogenase

(d) Anhydrase

R.A.S./R.T.S. (Pre) 1999

Ans

(b) Amylase

8. Energy is stored in liver and muscles in the form of:

(a) Carbohydrate

(b) Fat

(c) Protein

(d) Glycogen

56th to 59th B.P.S.C. (Pre) 2015

Ans

(d) Glycogen

9. In which organ hydrochloric acid is secreted?

(a) Intestine

(b) Liver

(c) Stomach

(d) Pancreas

M.P. P.C.S. (Pre) 2021

Ans

(c) Stomach

10. Enzyme is a –

(a) Vitamin

(b) Bacterium

(c) Bio-catalyst

(d) Virus

Uttarakhand P.C.S. (Pre) 2010

Ans

(c) Bio-catalyst

11. Enzymes are basically –

(a) Fats

(b) Sugars

(c) Proteins

(d) Vitamins

U.P. Lower Sub. (Mains) 2013, M.P.P.C.S. (Pre) 1990

Uttarakhand P.C.S. (Mains) 2002, Uttarakhand P.C.S. (Pre) 2002

U.P.P.C.S. (Pre) 1996, U.P.P.C.S. (Spl.) (Mains) 2004

Ans

(c) Proteins

12. Most of the enzymes are:

(a) proteins

(b) lipids

(c) acids

(d) alkalis

(e) None of the above/More than one of the above

67th B.P.S.C. (Pre) (Re. Exam) 2022

Ans

(a) proteins

13. Enzymes are –

(a) Fats

(b) RNA

(c) Proteins

(d) None of the above

Jharkhand P.C.S. (Pre) 2013

Ans

(c) Proteins

14. Substances which are responsible for catalyzing chemical reactions in living systems are :

(a) Bacteria

(b) DNA

(c) Enzymes

(d) Proteins

44th B.P.S.C. (Pre) 2000

Ans

(c) Enzymes

15. Which of the following statements about enzymes is/are correct?

1. They are biocatalysts.

2. They perform their action on the site where they are produced.

Select the correct answer from the codes given below:

Codes:

(a) 1 only

(b) 2 only

(c) Both 1 and 2

(d) Neither 1 nor 2

U.P.P.C.S. (Pre) 2019

Ans

(a) 1 only

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

(a) Zymase

(b) Invertase

(c) Maltase

(d) Diastase

Jharkhand P.C.S. (Pre) 2013

Ans

(a) Zymase

17. How is liver affected on fasting for more than 10 days?

(a) Glucose level in liver diminished

(b) Glucose level in liver increases

(c) In liver triglycerides decrease

(d) In liver triglycerides increase

U.P. R.O./A.R.O. (Pre) 2021

Ans

(a) Glucose level in liver diminished

18. Digestion of Lipids takes place in the presence of some of the following:

1. Bile acids

2. Lipase

3. Pepsin

of these,

(a) Only 1 is correct

(b) Only 1 and 3 are correct

(c) Only 1 and 2 are correct

(d) 1, 2 and 3 are correct

U.P. P.C.S. (Mains) 2016

Ans

(c) Only 1 and 2 are correct

19. The source of the enzyme ‘lipase’ is:

(a) Kidney

(b) Pancreas

(c) Liver

(d) Heart

(e) None of the above/More than one of the above

66th B.P.S.C. (Pre) (Re. Exam) 2020

Ans

(b) Pancreas

20. Which is the largest gland in the human body?

(a) Liver

(b) Pancreas

(c) Thyroid gland

(d) Stomach

M.P.P.C.S. (Pre) 1990

Ans

(a) Liver

21. In human body, the digestion of protein begins in which of the following organs?

(a) Liver

(b) Mouth

(c) Small intestine

(d) Stomach

U.P. P.C.S. (Pre) 2020

Ans

(d) Stomach

22. Which one of the following enzymes convert proteins into amino acids?

(a) Pepsin

(b) Lactase

(c) Urease

(d) Zymase

U.P. R.O./A.R.O. (Pre) 2017

Ans

(a) Pepsin

23. The stones present in the human gallbladder primarily affect the digestion of

(a) Fats

(b) Proteins

(c) Carbohydrates

(d) Nucleic acids

U.P. P.C.S. (Mains) 2017

U.P.P.C.S. (Pre) 2017

Ans

(a) Fats

24. An enzyme which helps in the digestion of protein is:

(a) Urease

(b) Sulfatase

(c) Trypsin

(d) Protease

U.P.P.C.S (Pre) 2010

Ans

(c) Trypsin

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

(a) Proteins to peptones

(b) Proteins to peptides

(c) Proteins to amino acids

(d) Starch to glucose

R.A.S./R.T.S. (Pre) 1999

Ans

(c) Proteins to amino acids

26. The largest gland in human body is –

(a) Pancreas

(b) Liver

(c) Salivary gland

(d) Adrenal gland

M.P. P.C.S. (Pre) 2016

Ans

(b) Liver

27. Bile is stored in which of the following organ?

(a) Spleen

(b) Pancreas

(c) Appendix

(d) Gallbladder

R.A.S./R.T.S. (Pre) 1992

Ans

(d) Gallbladder

28. 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:

Codes:

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

(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).

(c) (A) is true but (R) is false.

(d) (A) is false but (R) is true.

U.P.P.C.S. (Pre) 2017

Ans

(b) Both (A) and (R) are true but (R) is not the correct explanation of (A).

29. Match List-I with List-II and select the correct answer by using the codes given below:

List I List II

A. Vitamin 1. Pepsin

B. Enzyme 2. Carotene

C. Hormone 3. Keratin

D. Protein 4. Testosterone/Progesterone

Code:

A B C D

(a) 1 2 3 4

(b) 2 1 4 3

(c) 2 1 3 4

(d) 1 2 4 3

U.P. R.O./A.R.O. (Mains) 2021

U.P. Lower Sub. (Pre) 1998

Ans

(b) 2 1 4 3

30. Bile is produced in which part of the body?

(a) Liver

(b) Spleen

(c) Gallbladder

(d) Pancreas

U.P.P.C.S. (Pre) 1999

Ans

(a) Liver

31. Consider the following:

i. This is the second largest gland of the human body.

ii. Its secretion comes out from a characteristic type of cells and is alkaline.

iii. Its secretion is said to be complete digestive juice.

These characteristics are of

(a) liver

(b) spleen

(c) pancreas

(d) salivary glands

U.P.P.C.S. (Spl) (Mains) 2008

Ans

(c) pancreas

32. The ultimate substance to which the carbohydrates are degraded, is:

(a) amino acid

(b) glycerol

(c) glucose

(d) maltose

(e) None of the above/More than one of the above

67th B.P.S.C. (Pre) (Re. Exam) 2022

Ans

(c) glucose

33. Extra glucose in body gets converted into glycogen and is stored in

(a) Stomach

(b) Liver

(c) Pancreas

(d) Bile

U.P.P.C.S. (Mains) 2004

Ans. (b)

Ans

(b) Liver

29. Identify the correct pair of enzyme and its function:

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

(b) E. coli restriction endonuclease-II – cuts DNA at specific places.

(c) Acrosin – cortical granules of ovum secrete it to prevent polyspermic fertilization.

(d) Succinic dehydrogenase – Lysosomal marker enzyme, hydrolyses metabolites.

R.A.S./R.T.S. (Re. Exam) (Pre) 2013

Ans

(b) E. coli restriction endonuclease-II – cuts DNA at specific places.

Detailed Notes Human Digestive System for UPSC & Other Exams

Courtesy Self Study Wala – https://selfstudywala.com/


Human Digestive System MCQ

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