Digestion and Absorption

Which of the following functions is not performed by secretions from salivary glands?

1. Control bacterial population in mouth
2. Digestion of complex carbohydrates
3. Lubrication of oral cavity
4. Digestion of disaccharides

Choose the incorrect enzymatic reaction:

1. Dipeptides Dipeptidases Amino acids
2. Maltose Maltase Glucose + Fructose
3. Sucrose Sucrase Glucose + Fructose
4. Lactose Lactase Glucose + Galactose

Succus entericus is referred to as :

1. Chyme
2. Pancreatic juice
3. Intestinal juice
4. Gastric juice

The enzyme enterokinase helps in conversion of

1. pepsinogen into pepsin
2. protein into polypeptides
3. trypsinogen into trypsin
4. caseinogen into casein

Which of the following gastric cells indirectly help in erythropoiesis?

1. Mucous cells
2. Parietal cells
3. Chief cells
4. Goblet cells

Which of the following options best represents the enzyme composition of pancreatic juice?

1. Amylase, Pepsin, Trypsinogen, Maltase
2. Peptidase, Amylase, Pepsin, Rennin
3. Lipase, Amylase, Trypsinogen, Procarboxypeptidase
4. Amylase, Peptidase, Trypsinogen, Rennin

The enzyme that is not present in succus entericus is

1. nucleosidase
2. lipase
3. maltase
4. nuclease.

Gastric juice of infants contains

1. pepsinogen, lipase, rennin
2. amylase, rennin, pepsinogen
3. maltase, pepsinogen, rennin
4. nuclease, pepsinogen

The initial step in the digestion of milk in humans is carried out by

1. lipase
2. trypsin
3. rennin
4. pepsin.

A healthy person eats the following diet – 5 g raw sugar, 4 g albumin, 10 g pure buffalo ghee adulterated with 2 g vegetable ghee (hydrogenated vegetable oil) and 5 g lignin. How many calories he is likely to get?

1. 126
2. 164
3. 112
4. 144

Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?

1. Pancreatic amylase Salivary amylase Lipases
2. Disaccharidase like maltase Lipases Nucleases
3. Salivary amylase Pancreatic amylase Disaccharidases
4. Salivary maltase Carboxy peptidase Trypsinogen

Two friends are eating together on a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of

1. epiglottis
2. diaphragm
3. neck
4. tongue

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.

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)

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.

Hydrolytic enzymes which act at low pH are called

1. proteases
2. -amylases
3. hydrolases
4. peroxidases.

In mammals milk is digested by the action of

1. rennin
2. amylase
3. intestinal bacteria
4. invertase

A person is eating boiled potato; his food contains the component

1. cellulose which is digested by cellulase
2. starch which is not digested
3. lactose which is not digested
4. DNA which can be digested by pancreatic DNase