Table of Contents
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
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Human Digestive System MCQ