Digestion and Absorption Test

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Digestion and Absorption Test - 21

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Question 1
1 / -0

Part of the stomach which opens into the duodenum is

A
Cardiac

B
Pylorus

C
Fundus

D
Body

Solution

The pylorus is a narrow cone shaped constriction present at the end of the stomach and the beginning of the small intestine. It contains two region antrum which connects the parts of the stomach and pyloric canal which connects the stomach and small intestine. Thus, the correct answer is option B.
Question 2
1 / -0

Which of the following is a group of end products of carbohydrate digestion?

A
Glucose, galactose, maltose

B
Sucrose, galactose, maltose

C
Galactose, glucose, fructose

D
None of the above

Solution

The end product of carbohydrate digestion is mainly glucose together with some fructose and galactose (monosaccharide).
Question 3
1 / -0

Milk protein is curdled into calcium paracaseinate by

A
Maltase

B
Rennin

C
Trypsin

D
Lactase

Solution

In young mammals, milk protein caseinogen is digested with the help of an enzyme called rennin. Prorennin is converted into active rennin in the presence of HCl. Rennin curdles milk protein caseinogens, which is hydrolyzed into casein. Rennin converts casein into solid calcium paracaseinate in presence of Ca$$^{++}$$, so that pepsin can reduce it to peptones. Hence, the correct answer is B.
Question 4
1 / -0

Which one of the following is the matching pair of digestive enzyme and substrate?

A
Rennin - Protein

B
Amylase - Lactose

C
Trypsin - Starch

D
Invertase - Maltose

Solution

In young mammals, milk protein caseinogens are digested with the help of an enzyme, called rennin. It converts prorennin into active rennin in the presence of HCl. Rennin curdles milk protein caseinogens, which is hydrolyzed into casein. Rennin converts casein into solid calcium paracaseinate in presence of Ca$$^{++}$$ so that pepsin can reduce it to peptones.
Question 5
1 / -0

Which of the following is not present in pancreatic juice?

A
Trypsinogen

B
Chymotrypsin

C
Pepsin

D
Lipase

Solution

Pancreatic juice is secreted by the pancreas, which contains a variety of enzymes, including trypsinogen, chymotrypsinogen, elastase, carboxypeptidase, pancreatic lipase and amylase. Pepsin in not present in pancreatic juice. It is secreted by the peptic cells of the stomach.
Question 6
1 / -0

In ileum which of the following is absorbed?

A
Vitamin K

B
Bile salt

C
Glucose

D
Fat

Solution

The small intestine is the site for digestion as well as absorption of food. The absorption of the majority of nutrients takes place in the jejunum but iron is absorbed in the duodenum. Vitamin B12 and bile salts are absorbed in the terminal ileum. After the digestion of fat, bile salts is absorbed by the ileum of small intestine and fats are absorbed by the lacteal.
Question 7
1 / -0

Essentially the word digestion means

A
Burning of food

B
Oxidation of food

C
Hydrolysis of food

D
Breakdown of food

Solution

Digestion is the breakdown of food into smaller components that can be more easily absorbed and assimilated by the body. These smaller substances are absorbed through the small intestine into the bloodstream.
Thus, the correct answer is option D.
Question 8
1 / -0

Lacteals are found in

A
Liver

B
Lungs

C
Kidney

D
Villus of intestine

Solution

Lacteals are lymphatic vessels found in small intestinal villi. While other nutrients such as amino acids and saccharides are absorbed into the blood stream, lacteals absorb fat. Occurring in the fingerlike villi of the ileum, lacteals have a milky appearance and drain into the lymphatic system. Before fat can pass into the lacteal, bile from the liver causes its emulsification into small droplets for attack by the enzyme lipase.
So, the correct answer is option D.
Question 9
1 / -0

In the human digestive system maltase converts

A
Maltose to glucose at pH greater than 7

B
Maltose to glucose at pH less than 7

C
Maltose to alcohol

D
Starch to maltose at higher pH than 7

Solution

Enzymes in saliva convert starch into glucose. Amylase catalyzes starch to maltose; maltase catalyzes maltose to glucose. The enzymes in the small intestine work best in alkaline conditions. So, the pH of the intestine is slightly basic, i.e., 7.
So, option A is correct here.
Question 10
1 / -0

Taeniae are found in

A
Small intestine

B
Stomach

C
Large Intestine

D
All of the above

Solution

In the wall of caecum and colon, the longitudinal muscle layer is thickened along three lines, forming the taeniae.

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Digestion and Absorption Test - 21

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Digestion and Absorption Test - 21

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Question 1

Cardiac

Pylorus

Fundus

Body

Solution

Question 2

Glucose, galactose, maltose

Sucrose, galactose, maltose

Galactose, glucose, fructose

None of the above

Solution

Question 3

Maltase

Rennin

Trypsin

Lactase

Solution

Question 4

Rennin - Protein

Amylase - Lactose

Trypsin - Starch

Invertase - Maltose

Solution

Question 5

Trypsinogen

Chymotrypsin

Pepsin

Lipase

Solution

Question 6

Vitamin K

Bile salt

Glucose

Fat

Solution

Question 7

Burning of food

Oxidation of food

Hydrolysis of food

Breakdown of food

Solution

Question 8

Liver

Lungs

Kidney

Villus of intestine

Solution

Question 9

Maltose to glucose at pH greater than 7

Maltose to glucose at pH less than 7

Maltose to alcohol

Starch to maltose at higher pH than 7

Solution

Question 10

Small intestine

Stomach

Large Intestine

All of the above

Solution

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