Tag: coordination in life processes

Questions Related to coordination in life processes

Ptyalin is an enzyme present in

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Gastric juice

  2. Pancreatic juice

  3. Intestinal juice

  4. Saliva

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Correct Option: D

Starch is changed to maltose by

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Diastase/amylase

  2. Invertase

  3. Lipase

  4. Zymase

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Correct Option: A

Substrate for amylase enzyme is

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Nucleic acid

  2. Protein

  3. Starch

  4. Fat

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Correct Option: C

If you chew on a piece of bread long enough, it will begin to taste sweet because

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. maltase is breaking down maltose

  2. lipases are forming fatty acids

  3. amylase is breaking down starches to disaccharides

  4. disaccharides are forming glucose.

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Correct Option: C
Explanation:

When you chew a piece of bread long enough, it will begin to taste sweet because amylase breaks down the starch to disaccharides.  

So the correct option is C.

Emulsification of facts is done by-

biology coordination in life processes experiments on digestive enzymes role of receptors in the mouth types of teeth

  1. Saliva

  2. bile

  3. gastric juices

  4. intestinal juices

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Correct Option: A
Explanation:

Chemical digestion takes place as lingual lipase, an enzyme in your saliva, begins to emulsify fat and saliva moistens the food to make it easier to swallow. When the food reaches your stomach, the muscles there begin to churn and move to further break it down. So the correct option is 'Saliva'.

Digestion of starch starts in the stomach.

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. True

  2. False

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Correct Option: B
Explanation:

Digestion of starch starts from the mouth. The salivary gland in the mouth secretes saliva, which mixes with the food that is chewed. This is because to moisten the food. The saliva in the mouth contains the enzyme called amylase that is the starch-digesting enzyme.

So, the correct answer is option B.

Which part of the mammalian alimentary canal does not secrete any enzyme?

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Mouth

  2. Oesophagus

  3. Stomach

  4. Duodenum

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Correct Option: B
Explanation:

'Oesophagus' does not secrete any enzyme.

So the correct option is B.

J-shaped muscular bag that churns the food is 

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Small intestine

  2. Stomach

  3. Large intestine

  4. Oesophagus 

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Correct Option: B
Explanation:

Stomach: It is a muscular J- shaped thickly walled bag. Stomach churns the food to mix digestive juices. The food in the stomach is churned into semi-solid. The churned semi-solid food is called chime.

So, the correct answer is 'Stomach'.

A muscular structure that regulates the opening of the oesophagus into the stomach is known as

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Epiglottis

  2. Lower esophagus sphincter

  3. Pyloric sphincter

  4. Sphincter of Oddi

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Correct Option: B
Explanation:
A. The epiglottis is a leaf-shaped cartilaginous flap located behind the tongue. It prevents the entry of food in the windpipe by sealing off the windpipe while eating the food.
B. Lower oesophagus sphincter, also known as a cardiac orifice, is the opening of the oesophagus into the stomach. It regulates the opening of the oesophagus into the stomach.
C. Pyloric sphincter is found between the duodenum and posterior stomach. It regulates the opening of the duodenum into the stomach.
D. Sphincter of Oddi is the opening of the hepatopancreatic duct into the duodenum.
So, the correct answer is 'Lower oesophagus sphincter'.

Select the incorrect match

bio-chemistry coordination in life processes digestive system - organs process of digestion coordination in the process of digestion

  1. Stomach wall - Oblique muscle layer present

  2. Chylomicrons - Product of emulsification in intestinal lumen

  3. Thaimine deficiency- - Beri beri

  4. None of the above

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Correct Option: D
Explanation:

All the above options are correct.So, the correct option is 'None of the above'.