Tag: digestion in intestine

Questions Related to digestion in intestine

Maximum digestion of food takes place in

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Stomach

  2. Jejunum

  3. Colon

  4. Duodenum

Show answer
Correct Option: D
Explanation:
  • Small intestine has three parts - duodenum, jejunum, and ileum. 
  • The maximum digestion of food takes place in the duodenum. While the digestion of food is completed in jejunum.
  •  The maximum absorption of food takes place in ileum.

End products of protein hydrolysis are

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Mixture of amino acids

  2. Sugars

  3. Peptides

  4. 25 amino acids

Show answer
Correct Option: A
Explanation:

Proteins are biopolymers made up of  by joining together of amino acids with the help of peptide bonds. When proteins are acted upon by digestive proteolytic enzymes in the gut the peptide bonds are hydrolyzed and a mixture of amino acids is obtained.

Which one of the following pairs of the cells with their secretion is correctly matched?

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Oxyntic cells- A secretion with pH between 2.0 and 3.0

  2. Alpha cells of Islets of Langerhans- Secretion that decreases blood sugar level

  3. Kupffer cells- A digestive enzyme that hydrolysis nucleic acids

  4. Sebaceous glands- A digestive enzyme that hydrolysis nucleic acids

Show answer
Correct Option: A
Explanation:

Oxyntic cells or parietal cells, are the stomach epithelium cells that secrete gastric acid intrinsic factor. These cells secrete hydrochloric acid (HCl), which makes the gastric juice acidic (pH =2 -3). 

Oxyntic cells  are the epithelial cells that secrete hydrochloric acid (HCl) and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and in the body of the stomach.
Alpha cells of islets of Langerhans secretes glucagon hormone, which increase the glucose level in the blood by converting glycogen to glucose in liver cells. 

Kupffer cells are specialized cells in the liver that destroy bacteria, foreign proteins and worn-out blood cells. 
Sebaceous glands and microscopic glands in the skin that secrete an oily/waxy matter (called as sebum) to lubricate the skin and hair of mammals.

Therefore, the correct answer is option A.

Where is protein digestion accomplished?

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Stomach

  2. Ileum

  3. Rectum

  4. Duodenum

Show answer
Correct Option: B
Explanation:

Protein digestion occurs in stomach, duodenum, jejunum and ileum. It is completed in ileum.

The organ that stores bile is

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Pancreas

  2. Liver

  3. Gall bladder

  4. Spleen

Show answer
Correct Option: C
Explanation:

The digestive role of the liver is to produce bile and export it to the duodenum. The gall bladder primarily stores, concentrates and releases bile. 

So, the correct answer is 'Gall bladder'.

Digestion of both starch and protein is carried out by

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Gastric juice

  2. Gastric lipase

  3. Pancreatic juice

  4. Ptyalin

Show answer
Correct Option: C

Enzyme lactase occurs in

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Saliva

  2. Pancreatic juice

  3. Intestinal juice

  4. Stomach

Show answer
Correct Option: C

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

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. Amylase, peptidase, trypsinogen, rennin

  2. Lipase, amylase, trypsinogen, peptidase

  3. Lipase, amylase, pepsin, maltase

  4. Peptidase, amylase, pepsin, rennin

Show answer
Correct Option: B
Explanation:

Pancreatic juice is liquid secetrted by pancreas . It is alkaline in nature and it has following enzymes lipase, for digesting fats, amylase for digesting starch, trypsinogen for digesting proteins.

The end products of protein digestion are

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. monosaccharides

  2. steroids

  3. amino acids

  4. fatty acids

Show answer
Correct Option: C
Explanation:

  1. Amino acids and proteins are the building blocks of life. Amino acids are organic compounds that combine to form proteins.
  2.  When proteins are digested or broken down, amino acids are left. Zymogenic cell or peptic cell in the stomach that releases pepsinogen and chymosin. 
  3. This inactive pepsinogen, on exposure to hydrochloric acid, gets converted to the active enzyme pepsin.
  4.  Pepsin is produced in the stomach and is one of the main digestive enzymes, which helps in digestion of the proteins to polypeptide chains. The end product of protein is it must be broken down into amino acids. Hence, the end product of protein digestion is amino acids.
So, the correct answer is 'amino acids'.

A pancreatic zymogen secreted into the duodenum, can be activated by:-

bio-chemistry coordination in life processes role of intestine digestion in intestine mechanism of digestion digestive system - organs

  1. trypsin

  2. pepsin

  3. secretin

  4. chymotrypsin

Show answer
Correct Option: A
Explanation:

Enteropeptidase is an enzyme produced by the cells of the duodenum and is involved in the digestion in humans and other animals. Enteropeptidase converts trypsinogen (a zymogen) into its active form trypsin, resulting in the subsequent activation of pancreatic digestive enzymes

So, the correct answer is 'trypsin'