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NEET • BIOLOGY • DIGESTION AND ABSORPTION

Digestion and absorption practice · Mixed difficulty

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Showing 31-60 of 255 questions

31 Easy

31 of 255

Remembering +4 | -1

Which is not a disorder of the digestive system?

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Correct option: C

Emphysema

Option C (Emphysema) is correct because emphysema is a respiratory disorder, not a digestive disorder. The other options are all digestive system disorders.

32 Easy

32 of 255

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Brunner’s glands are located in

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Correct option: D

Duodenum

The correct answer is D (Duodenum) because Brunner's glands are submucosal glands specifically located in the duodenum.

33 Hard

33 of 255

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At interval throughout the G.I tract, which layer is thickened and modified to form sphincters?

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Correct option: C

Circular smooth muscle

Option C is correct because the circular smooth muscle layer in the GI tract thickens and modifies to form sphincters, which control the passage of food.

34 Medium

34 of 255

Understanding +4 | -1

The epithelial cells lining the stomach of vertebrates are protected from being damaged by HCl because

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Correct option: D

The epithelial cells are covered by a mucus secretion

Option D (The epithelial cells are covered by a mucus secretion) is correct because the mucus layer provides a protective barrier against the corrosive effects of HCl.

35 Easy

35 of 255

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Which is the hardest material of the human body?

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Correct option: B

Enamel

Option B (Enamel) is correct because enamel is the hardest substance in the human body due to its high mineral content.

36 Hard

36 of 255

Understanding +4 | -1

Incorrect statement w.r.t. diarrhoea is

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Correct option: D

There is inadequate enzyme secretion

Option D (There is inadequate enzyme secretion) is correct because diarrhoea primarily involves increased frequency and liquidity of bowel movements, and reduced absorption, not necessarily inadequate enzyme secretion.

37 Easy

37 of 255

Remembering +4 | -1

Secretin and cholecystokinin are secreted by

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Correct option: A

( Brunner’s glands)  mucosa of small intestin (duodenum)

The correct answer is A (( Brunner’s glands)  mucosa of small intestin (duodenum)) because secretin and cholecystokinin are secreted by the mucosa of the small intestine, specifically the duodenum, sometimes associated with Brunner's glands.

38 Medium

38 of 255

Understanding +4 | -1

Assertion: Enamel is the hardest substance of the human body.

Reason: It covers the external surface of the tooth.

View answer and explanation

Correct option: D

Both Assertion and Reason are correct and Reason is the correct explanation of Assertion

Option D (Both Assertion and Reason are correct and Reason is the correct explanation of Assertion) is correct because enamel is indeed the hardest substance in the human body, and it covers the external surface of the tooth, which is why it needs to be so hard.

39 Hard

39 of 255

Analyzing +4 | -1

Go through the following statements regarding the disorders of the digestive system. Choose the correct statements and select appropriate option from the codes given below
I. Indigestion is caused by the poor supply of digestive enzyme, overeating, anxiety and a lot of junk food
II. Constipation, an irregular movement of bowl is caused due to poor habits, fiberless diet, emotional stress and certain drugs
III. Indigestion can be caused by milk of magnesia
IV. Ejection of stomach content is controlled by hypothalamus of prosencephalon

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Correct option: C

I and II statements are correct

Option C (I and II statements are correct) is the answer because Indigestion can be caused by poor enzyme supply, overeating, anxiety, and junk food, and Constipation can result from poor habits, fiberless diets, emotional stress, and certain drugs.

40 Medium

40 of 255

Remembering +4 | -1

What is the major site for the conversion of proteins into free amino acids?

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Correct option: C

Intestine

Option C (Intestine) is correct because the small intestine is the major site for the final digestion of proteins into free amino acids.

41 Hard

41 of 255

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Assertion: Gastric glands occur throughout the alimentary canal.

Reason: Gastric juice helps in movement of food through the alimentary canal.

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Correct option: C

Assertion is not correct but Reason is correct

Option C (Assertion is not correct but Reason is correct) is correct because gastric glands are not found throughout the alimentary canal, but gastric juice does aid in food movement.

42 Easy

42 of 255

Understanding +4 | -1

Which of the following does not match?

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Correct option: A

Pancreas- Glisson’s capsule

Option A (Pancreas- Glisson’s capsule) is correct because the pancreas does not have Glisson's capsule; the liver does.

43 Hard

43 of 255

Remembering +4 | -1

Which one of the following amino acids is an essential part of human diet?

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Correct option: B

Phenylalanine

Option B is correct because Phenylalanine is an essential amino acid, meaning it cannot be synthesized by the human body and must be obtained from the diet.

44 Easy

44 of 255

Remembering +4 | -1

What is the main site of amino acids absorption in human’s small intestine?

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Correct option: D

Both (a) and (b)

Option D (Both (a) and (b)) is correct because amino acids are absorbed in both the duodenum and jejunum of the small intestine.

45 Medium

45 of 255

Remembering +4 | -1

Small finger-like projection, which produce numerous microscopic projections are supplied with a network of

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Correct option: A

Blood capillaries and lacteal

Option A (Blood capillaries and lacteal) is correct because villi in the small intestine are supplied with both blood capillaries for absorbing most nutrients and lacteals for absorbing fats.

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46 Medium

46 of 255

Analyzing +4 | -1

Which of the following statement is incorrect
w.r.t. dentition of human?

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Correct option: D

Except 4 premolars, all premolars and molars
are diphyodont

Option D is correct because all premolars and molars are monophyodont (erupt only once) except for the deciduous molars which are replaced by premolars.

47 Hard

47 of 255

Understanding +4 | -1

Read the following statements about cells present in gastric glands and choose the correct option.
Statement I : Paneth cells secrete mucus.
Statement II : Chief cells secrete HCl and intrinsic factor.

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Correct option: D

Both statements are incorrect

Option D is correct because Paneth cells secrete antimicrobial substances, and Chief cells secrete pepsinogen, not HCl or intrinsic factor.

48 Medium

48 of 255

Analyzing +4 | -1

All of the following are common symptoms for Kwashiorkor and Marasmus except

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Correct option: D

Extensive oedema

Option D (Extensive oedema) is the exception because it is a prominent symptom of Kwashiorkor but not typically a major symptom of Marasmus.

49 Hard

49 of 255

Understanding +4 | -1

Which one of the following statements is true regarding digestion and absorption of food in humans?

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Correct option: C

Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries

Option D (Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries) is correct because chylomicrons transport fats from the intestine into lacteals, which eventually drain into the bloodstream.

50 Medium

50 of 255

Understanding +4 | -1

What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?

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Correct option: C

In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin

Option C (In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin) is correct because parietal cells secrete HCl, which is essential for converting pepsinogen to pepsin.

51 Medium

51 of 255

Understanding +4 | -1

During prolonged hunger strike, what is the correct chronological sequence of ending the food stuff?

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Correct option: D

Carbohydrate-fat-proteins

Option D is correct because during prolonged hunger, the body first depletes carbohydrate stores, then fat reserves, and finally, breaks down proteins for energy.

52 Medium

52 of 255

Remembering +4 | -1

What are the trace components of our food?

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Correct option: B

Minerals and vitamins

Option B (Minerals and vitamins) is correct because trace components in food refer to micronutrients like minerals and vitamins.

53 Medium

53 of 255

Remembering +4 | -1

Deficiency of tocopherol in the human body causes which condition?

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Correct option: C

Infertility

Option C (Infertility) is correct because tocopherol (Vitamin E) deficiency can lead to reproductive issues and infertility.

54 Medium

54 of 255

Analyzing +4 | -1

Choose the odd one out w.r.t. liver

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Correct option: C

Cholecystitis

Option C is correct because cholecystitis is an inflammation of the gallbladder, while the other options relate to liver functions.

55 Easy

55 of 255

Understanding +4 | -1

The largest variety of digestive enzymes is found in

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Correct option: C

Omnivores

Option C (Omnivores) is correct because they consume both plant and animal matter, requiring a wider range of enzymes for digestion.

56 Medium

56 of 255

Understanding +4 | -1

Go through the following statements regarding starch digestion. Separate true and false statements and select the correct option accordingly
I. Digestion of starch starts from the mouth
II. Around 30% of the starch is digested in the stomach
III. Digestion of food requires the action of pancreatic juices
IV. Digestion of food is completed in the longest part of the alimentary canal

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Correct option: B

I, III and IV are true while II is false

Option D (II and, IV are false while III and I are true) is correct because starch digestion starts in the mouth, pancreatic juices are required, digestion is completed in the small intestine, and only about 30% of starch is NOT digested in the stomach.

57 Medium

57 of 255

Analyzing +4 | -1

Assertion: Starch in the chyme are hydrolyzed
by pancreatic amylase into glucose molecules.

Reason: About 70 per cent of the starch is
hydrolyzed in oral cavity by salivary amylase.

View answer and explanation

Correct option: D

If both Assertion and Reason are false

Option D (If both Assertion and Reason are false) is correct because starch in the chyme is hydrolyzed by pancreatic amylase into disaccharides, and about 30% of starch is hydrolyzed in the oral cavity.

58 Easy

58 of 255

Remembering +4 | -1

Maximum percentage of lipoprotein is in

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Correct option: A

Chylomicron

Option A (Chylomicron) is correct because chylomicrons are known to have the highest percentage of lipids compared to other lipoproteins.

59 Easy

59 of 255

Remembering +4 | -1

Which of the following represent bile salts?

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Correct option: D

Sodium glycocholate and taurocholate

Option D (Sodium glycocholate and taurocholate) is correct because these are the primary bile salts that aid in fat emulsification and absorption.

60 Medium

60 of 255

Remembering +4 | -1

Which vitamin should not be stored?

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Correct option: D

Ascorbic acid

Option D (Ascorbic acid) is correct because Ascorbic acid (Vitamin C) is water-soluble and not stored in the body to a significant extent.

Revision notes and key takeaways

Review DIGESTION AND ABSORPTION in your textbook or class notes, then use this set to check your understanding.

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