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Digestion and Absorption · Question 41

AIPMT 2009MCQMedium📈 Topic in 12% papers+4−1
1

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

  1. Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+.
  2. Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.
  3. About 60% of starch is hydrolysed by salivary amylase in our mouth.
  4. Oxyntic cells in our stomach secrete the proenzyme pepsinogen.

Answer

(1) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+.

Solution

As per NCERT, fructose and some of the amino acids are absorbed with the help of carrier ions like Na+ (facilitated transport). (1) is true.

Chylomicrons are transported into the lymph vessels (lacteals) in the villi, not into blood capillaries. (2) is false.

About 30% of starch is hydrolysed by salivary amylase in the mouth. (3) is false.

Oxyntic (parietal) cells secrete HCl and Castle's intrinsic factor; pepsinogen is secreted by peptic (chief) cells. (4) is false.

Answer: (1)

Out of syllabusAIPMT 2009

Keep practising — Digestion and Absorption

2

Which one of the following pairs of food components in humans reaches the stomach totally undigested?

  1. Starch and fat
  2. Fat and cellulose
  3. Starch and cellulose
  4. Protein and starch
Out of syllabusAIPMT 2009
3

Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?

  1. Small intestine : Proteins Pepsin amino acids
  2. Stomach : Fats Lipase micelles
  3. Duodenum : Triglycerides Trypsin monoglycerides
  4. Small intestine : Starch -Amylase disaccharide (maltose)
Out of syllabusAIPMT 2008
4

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

  1. In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.
  2. Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted to trypsin.
  3. Gastric juice will be deficient in chymosin.
  4. Gastric juice will be deficient in pepsinogen.
Out of syllabusAIPMT 2008
5

Which one of the following is a fat-soluble vitamin and its related deficiency disease?

  1. Retinol – Xerophthalmia
  2. Cobalamine – Beri-beri
  3. Calciferol – Pellagra
  4. Ascorbic acid – Scurvy
Out of syllabusAIPMT 2007
6

Secretin and cholecystokinin are digestive hormones. They are secreted in

  1. pyloric stomach
  2. duodenum
  3. ileum
  4. oesophagus.
Out of syllabusAIPMT 2005
7

Epithelial cells of the intestine involved in food absorption have on their surface

  1. pinocytic vesicles
  2. microvilli
  3. zymogen granules
  4. phagocytic vesicles.
Out of syllabusAIPMT 2005
8

A patient is generally advised to specially consume more meat, lentils, milk and eggs in diet only when he suffers from

  1. scurvy
  2. kwashiorkor
  3. rickets
  4. anaemia.
Out of syllabusAIPMT 2005
9

Which group of three of the following five statements (1–5) contain all three correct statements regarding beri-beri? 1. A crippling disease prevalent among the native population of sub-Saharan Africa 2. A deficiency disease caused by lack of thiamine (vitamin B1) 3. A nutritional disorder in infants and young children when the diet is persistently deficient in essential protein 4. Occurs in those countries where the staple diet is polished rice 5. The symptoms are pain from neuritis, paralysis, muscle wasting, progressive oedema, mental deterioration and finally heart failure.

  1. 2, 4 and 5
  2. 1, 2 and 4
  3. 1, 3 and 5
  4. 2, 3 and 5
Out of syllabusAIPMT 2005
10

The richest sources of vitamin B12 are

  1. goat's liver and Spirulina
  2. chocolate and green gram
  3. rice and hen's egg
  4. carrot and chicken's breast.
Out of syllabusAIPMT 2004
11

Which one of the following pairs is not correctly matched?

  1. Vitamin B12 - Pernicious anaemia
  2. Vitamin B6 - Convulsions
  3. Vitamin B1 - Beri-beri
  4. Vitamin B2 - Pellagra
Out of syllabusAIPMT 2004

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