Tag: digestive system - organs

Questions Related to digestive system - organs

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'

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

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

  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.

Show answer
Correct Option: D
Explanation:

Parietal cells secrete HCl and intrinsic factor. Parietal glands also secrete pepsinogen to which hydrochloric acid acts to convert it into pepsin. Pepsin in return causes digestion of protein. If parietal cells become non-functional, it will directly affect protein digestion. So, the correct answer is (d).

When the acidic food from stomach comes to small intestine which of the following acts on it to make it alkaline?

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

  1. Bile

  2. Trypsin

  3. Pepsin

  4. None of the above

Show answer
Correct Option: A
Explanation:
  • The pancreatic enzymes and intestinal enzymes are optimally active in alkaline pH (8.0-8.4) in the small intestine.
  • Thus, the acidic food from stomach is made alkaline by the action of bile.
  • Bile is alkaline in nature as it contains organic salt known as bile salt.

Which is not a parasite of the human intestine ?

bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

  1. ringworm

  2. pinworm

  3. threadworm

  4. tapeworm

Show answer
Correct Option: A
Explanation:
They have long round bodies and range in size. Roundworms can live in or on humans and can cause many problems. They are usually found in soil and stool and can enter the body through the mouth or direct contact with the skin. They can live in the human intestine for a very long time. They are called normal Flora.
So the correct option is 'Ringworm'.

If the chyme is pushed backwards in small quantity, then it reaches to

bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

  1. Large intestine

  2. Duodenum

  3. Oesophagus

  4. Small intestine

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Correct Option: A

The term "Faeces" used for the undigested substances present in ___

bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

  1. $Caecum$

  2. $Colon$

  3. $Rectum$

  4. $Anus$

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Correct Option: A

Escherichia coil lives in human and animal intestine. It is

bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

  1. Gram-positive and rod-shaped

  2. Gram-positive and spiral-shaped

  3. Gram-negative and rod-shaped

  4. Gram-negative and spherical

Show answer
Correct Option: A