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NEET • BIOLOGY • DIGESTION AND ABSORPTION
Digestion and absorption practice · Medium
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Understanding
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In the Absence of enterokinase, the digestion of ………… would be affected in our intestine.
View answer and explanation
Correct option: C
Albumin
Option C (Albumin) is correct because enterokinase activates trypsinogen to trypsin, which is essential for the digestion of proteins like albumin.
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Crypts of Leiberkuhn are example for
View answer and explanation
Correct option: A
Simple tubular gland
Option A (Simple tubular gland) is correct because Crypts of Lieberkühn are simple, tube-shaped glands found in the intestinal lining.
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Which of the following metals is present in vitamin-?
View answer and explanation
Correct option: A
Cobalt
Option A (Cobalt) is correct because vitamin B12 (cobalamin) contains cobalt as a central component of its structure.
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Read the statement A and B. A. In human, small intestine is the longest portion of the alimentary canal. B. Absorption of digested food requires a very large surface area. Identify the correct choice on the two statements.
View answer and explanation
Correct option: B
Statement A and B are both correct
Option B (Statement A and B are both correct) is correct because the small intestine is the longest part of the alimentary canal, and its large surface area is essential for absorption.
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Remembering
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Which of the following is/are the major components of food?
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Correct option: D
All of these
Option D (All of these) is correct because proteins, cereals, and fats are all major components of food.
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Understanding
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Drowsiness after a heavy meal occurs due to
View answer and explanation
Correct option: C
Reduced blood pressure in the brain
Option C (Reduced blood pressure in the brain) is correct because digestion requires increased blood flow to the digestive system, potentially reducing blood flow to the brain.
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Understanding
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Assertion (A): The type of Human Dentition are called heterodont.
Reason (R): An adult human has 32 permanent teeth which are of four different types
Reason (R): An adult human has 32 permanent teeth which are of four different types
View answer and explanation
Correct option: D
Both (A) and (R) are true and (R) is the correct explanation of (A)
Option D (Both (A) and (R) are true and (R) is the correct explanation of (A)) is correct because heterodont dentition refers to having different types of teeth, and humans have 32 teeth of four different types (incisors, canines, premolars, and molars).
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Analyzing
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Assertion: Fat is restricted in the diet of a person
who has undergone an operation to remove gall
bladder.
Reason: Gall bladder stores lipases which are
released in small intestine for digestion.
who has undergone an operation to remove gall
bladder.
Reason: Gall bladder stores lipases which are
released in small intestine for digestion.
View answer and explanation
Correct option: C
If Assertion is true but Reason is false
Option C (If Assertion is true but Reason is false) is correct because fat is restricted in the diet after gallbladder removal, but the gallbladder stores bile, not lipases.
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In the homeostatic control of blood sugar level, which organs function respectively as modulator and effector?
View answer and explanation
Correct option: A
Liver and islets of Langerhans
Option B (Hypothalamus and liver) is correct because the hypothalamus acts as the modulator by sensing blood sugar levels, and the liver acts as the effector by releasing or storing glucose.
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Assertion : Diarrhoea is the abnormal frequent
movement of bowel and increased liquidity of
faeces that may be caused by microorganisms,
stress and milk sugar intolerance.
Reason : Mild diarrhoea is caused by taking
active trophozoites deposited on the food items
by files. Causal parasite is Trichomonas
hominis of large intestine. Chyme passes
rapidly through the small intestine and faeces
in the large intestine. So, there is not enough
time for the absorption of water and electrolytes
by colon.
movement of bowel and increased liquidity of
faeces that may be caused by microorganisms,
stress and milk sugar intolerance.
Reason : Mild diarrhoea is caused by taking
active trophozoites deposited on the food items
by files. Causal parasite is Trichomonas
hominis of large intestine. Chyme passes
rapidly through the small intestine and faeces
in the large intestine. So, there is not enough
time for the absorption of water and electrolytes
by colon.
View answer and explanation
Correct option: A
If both Assertion and Reason are true and
Reason is the correct explanation of Assertion
Reason is the correct explanation of Assertion
Option A (If both Assertion and Reason are true and Reason is the correct explanation of Assertion) is correct because the reason explains the mechanism by which microorganisms, stress, or milk sugar intolerance can lead to diarrhea.
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Digestive enzymes are
View answer and explanation
Correct option: A
Hydrolases
The correct answer is A (Hydrolases) because digestive enzymes catalyze hydrolysis reactions, breaking down complex molecules by adding water.
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Understanding
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Which one is correct regarding the number of teeth and dental formula with reference to a child of age between 4 to 6 years?
View answer and explanation
Correct option: A
Option A () is correct because it represents the dental formula of a child aged 4-6 years, accounting for the absence of premolars.
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Understanding
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The epithelial cells lining the stomach of vertebrates are protected from being damaged by HCl because
View answer and explanation
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.
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Understanding
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Assertion: Enamel is the hardest substance of the human body.
Reason: It covers the external surface of the tooth.
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.
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Remembering
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What is the major site for the conversion of proteins into free amino acids?
View answer and explanation
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.
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Remembering
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Small finger-like projection, which produce numerous microscopic projections are supplied with a network of
View answer and explanation
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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Analyzing
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Which of the following statement is incorrect
w.r.t. dentition of human?
w.r.t. dentition of human?
View answer and explanation
Correct option: D
Except 4 premolars, all premolars and molars
are diphyodont
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.
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All of the following are common symptoms for Kwashiorkor and Marasmus except
View answer and explanation
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.
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What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
View answer and explanation
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.
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During prolonged hunger strike, what is the correct chronological sequence of ending the food stuff?
View answer and explanation
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.
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What are the trace components of our food?
View answer and explanation
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.
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Remembering
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Deficiency of tocopherol in the human body causes which condition?
View answer and explanation
Correct option: C
Infertility
Option C (Infertility) is correct because tocopherol (Vitamin E) deficiency can lead to reproductive issues and infertility.
23
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Analyzing
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Choose the odd one out w.r.t. liver
View answer and explanation
Correct option: C
Cholecystitis
Option C is correct because cholecystitis is an inflammation of the gallbladder, while the other options relate to liver functions.
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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
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
View answer and explanation
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.
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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.
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.
26
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Which vitamin should not be stored?
View answer and explanation
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.
27
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What is the composition of bile?
View answer and explanation
Correct option: D
All of the above
The correct answer is D (All of the above) because bile contains bile pigments (bilirubin and biliverdin), bile salts (sodium glycocholate and sodium taurocholate), cholesterol, and phospholipids.
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Which part of our body secretes the hormone secretin?
View answer and explanation
Correct option: C
Duodenum
Option C (Duodenum) is correct because the hormone secretin is secreted by the duodenum in response to acidic chyme.
29
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Choose an incorrect statement regarding the functions of large intestine
View answer and explanation
Correct option: B
Absorption of electrolytes, water and some amino acids occur mainly in the stomach
Option B is correct because the absorption of electrolytes, water, and some amino acids occurs mainly in the small intestine, not the stomach.
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Inadequate protein intake leads to kwashiorkor. The subsequent oedema is most closely related to inadequate synthesis of which protein?
View answer and explanation
Correct option: D
Albumin
Option D (Albumin) is correct because inadequate protein intake leads to reduced albumin synthesis, causing decreased oncotic pressure and subsequent oedema in kwashiorkor.
Revision notes and key takeaways
Review DIGESTION AND ABSORPTION in your textbook or class notes, then use this set to check your understanding.
Key Takeaways
- ✓ This set contains 106 single-correct-answer MCQs on DIGESTION AND ABSORPTION.
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Showing 1-30 of 106 questions