Digestion and Absorption · Question 33

Which one of the following enzymes carries out the initial step in the digestion of milk in humans?

1. Trypsin
2. Pepsin
3. Rennin
4. Lipase

If for some reason the parietal cells of the gut epithelium become partially non-functional, what is likely to happen?

1. The pancreatic enzymes and specially the trypsin and lipase will not work efficiently.
2. The pH of stomach will fall abruptly.
3. Steapsin will be more effective.
4. Proteins will not be adequately hydrolysed by pepsin into proteoses and peptones.

Jaundice is a disorder of

1. excretory system
2. skin and eyes
3. digestive system
4. circulatory system

Carrier ions like Na+ facilitate the absorption of substances like

1. amino acids and glucose
2. glucose and fatty acids
3. fatty acids and glycerol
4. fructose and some amino acids

If for some reason our goblet cells are nonfunctional, this will adversely affect

1. production of somatostatin
2. secretion of sebum from the sebaceous glands
3. maturation of sperms
4. smooth movement of food down the intestine

When breast feeding is replaced by less nutritive food low in proteins and calories; the infants below the age of one year are likely to suffer from

1. rickets
2. kwashiorkor
3. pellagra
4. marasmus

A young infant may be feeding entirely on mother's milk which is white in colour but the stools which the infant passes out is quite yellowish. What is this yellow colour due to?

1. Bile pigments passed through bile juice
2. Undigested milk protein casein
3. Pancreatic juice poured into duodenum
4. Intestinal juice

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.

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

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)