Tag: digestion in intestine

Questions Related to digestion in intestine

Ammonia formed during digestion is processed in

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

  1. Liver

  2. Small intestine

  3. Large intestine

  4. Stomach

Show answer
Correct Option: A
Explanation:
  • During digestion, the deamination of amino acids results in the production of ammonia (NH3). 
  • However, the liver contains a system of carrier molecules and enzymes which quickly converts the ammonia (and carbon dioxide) into urea
  • This ammonia is an extremely toxic base and its accumulation in the body may cause death.  Hence,  Ammonia is formed during digestion in the liver.
So, the correct answer is 'liver'.

Which of the options given below would not correctly fill the blanks in the following sentence?


In order to absorb and use ____ by the body, these must be broken down by hydrolysis into ___.

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

  1. Polysaccharides, Monosaccharides

  2. Amino acids, Proteins

  3. Fats, Glycerol and Fatty acids

  4. Disaccharldes, Monosaccharides

Show answer
Correct Option: B
Explanation:
  • Proteins are converted into dipeptides in the stomach which is followed by the conversion of dipeptides to amino acids in the small intestine. These amino acids are absorbed through the wall of the intestine as simple absorbable substances.
  • Hence In order to absorb and use Proteins by the body, these must be broken down by hydrolysis into proteins.
  • So, the correct answer is 'amino acids, proteins'.

Which one of the following enzyme is absent in invertebrates?

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

  1. Pepsin

  2. Trypsin

  3. Lipase

  4. Amyalase

Show answer
Correct Option: B
Explanation:

Protein in invertebrates is a breakdown by four different enzymes known as a proteinase, carboxypolypeptidase, aminopolypeptidase, and dipeptidase, which can be separated by adsorption but vertebrates have one extra enzyme trypsin is also found that helps in activation of the given four and digestion of protein.

So the correct option is 'Trypsin'.

What is common among amylase, rennin and trypsin?

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

  1. These are produced in stomach

  2. These act at a pH lower than $7$

  3. These all are proteins

  4. These all are proteolytic enzymes

Show answer
Correct Option: C
Explanation:

Amylase, rennin and trypsin are protein enzymes.

Amylase is enzymes that catalyse the hydrolysis of carbohydrates. Amylase is produced by the pancreas and salivary glands.
Rennin is an enzyme especially produced by stomach for digestion of milk proteins in infants. 
Trypsin is a proteolytic enzyme produced in the small intestine. 
So, the correct option is 'These all are proteins'.

Pancreatic amylase acts on?

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

  1. Starch

  2. Protein

  3. Lipid

  4. Disaccharide

Show answer
Correct Option: A

Lipase acts on ________________.

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

  1. Proteins

  2. Fats

  3. Carbohydrates

  4. Aminoacids

Show answer
Correct Option: A

The major site of protein breakdown to form free amino acids, is in the

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

  1. Kidney

  2. Spleen

  3. Intestine

  4. Bone-marrow

Show answer
Correct Option: C
Explanation:

Pancreatic juice contains pancreatic amylase, lipase and trypsin, trypsin converts polypeptides into the dipeptides in the first part of small intestine i.e., duodenum. The succus entricus in the third part of small intestine i.e., ileum converts dipeptides into the amino acids which are absorbed by the wall of the intestine. Thus, the correct answer is option C.

Proteins are broken down into amino acids completely in

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

  1. Buccal cavity

  2. Stomach

  3. Intestine

  4. Rectum

Show answer
Correct Option: C
Explanation:
  • Once a protein source reaches your stomach, hydrochloric acid, and enzymes called proteases to break it down into smaller chains of amino acids. 
  • Amino acids are joined together by peptides, which are broken by proteases.
  • Digestion of protein is completed in the small intestine by the pancreatic enzymes trypsin, chymotrypsin, and carboxypeptidase. Hence, Proteins are broken down into amino acids completely in Intestine. 
So, the correct answer is 'Intestine'.

The three secretions meeting the food in small intestine are

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

  1. Bile juice, pancreatic juice and intestinal juice

  2. Pancreatic, intestinal and gastric juice

  3. Bile, pancreatic and gastric juice

  4. Bile, gastric juice and saliva

Show answer
Correct Option: A
Explanation:

Various types of movements are generated by the muscularis layer of the small intestine. These movements help in a thorough mixing up of the food with various secretions in the intestine and thereby facilitate digestion. The bile, pancreatic juice and the intestinal juice are the secretions released into the small intestine. Pancreatic juice and bile are released through the hepato-pancreatic duct. The intestinal mucosal epithelium has goblet cells, which secrete mucus. The secretions of the brush border cells of the mucosa along with the secretions of the goblet cells constitute the intestinal juice or succus entericus.

Digestion of carbohydrates, proteins and fats completes in

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

  1. Stomach

  2. Liver

  3. Small intestine

  4. Large intestine

Show answer
Correct Option: C
Explanation:

Small intestine has three parts - duodenum, jejunum and ileum. When food leaves the stomach through its pyloric end and enters the duodenum it is called chyme (acidic). The digestion of macro molecules ingested is completed in small intestine. The digested products are absorbed in the small intestine and comes to the blood.