Tag: bio-chemistry

Questions Related to bio-chemistry

Enzymes of salivary glands, stomach and small intestine works at pH __, __ and ___ respectively.

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. 6.8, 2, 8

  2. 8,2, 6.8

  3. 2,8,6.8

  4. 6.8, 8,2

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Correct Option: A

pH of saliva is

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. 9.5

  2. 8.0

  3. 7.0

  4. 6.5

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Correct Option: D

Identify the correctly matched structure and its secretion

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Brunners glands Salivary amylase

  2. Intestinal mucosa Insulin

  3. Gall bladder Bile

  4. Salivary gland Lysozyme

  5. Goblet cells - HCl

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Correct Option: D

Which is not correct

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Human saliva is near neutral

  2. An adult secretes 1.0 1.5 l of saliva per day

  3. Saliva is secreted by six pairs of glands

  4. Ptyalin breaks down cooked starch into maltose

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Correct Option: C

Choose the wrong statement among the following

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Trypsinogen is activated by enterokinase

  2. Optimum pH for salivary amylase is 8.9

  3. Rennin helps in digestion of milk proteins

  4. Goblet cells secrete mucus

  5. Submucosal glands of intestine are also known as Brunners glands

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Correct Option: B

A lubricant mucin, in saliva, is made up of

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Polyunsaturated fats

  2. Actin and myosin

  3. Glycoproteins

  4. Phospholipids

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Correct Option: C
Explanation:
A. Polyunsaturated fats are the fats in which hydrocarbon chain has two or more double bonds.
B. Actin and myosin are the protein filaments which help in muscle contraction.
C. Proteins associated with carbohydrates i.e. sugars attached to them, are called glycoproteins.
D. Lipids that contain a phosphate group, are called phospholipids.
The lubricant mucin in saliva is a glycoprotein. 
So, the correct answer is 'Glycoproteins'.

 which of the following is not a salivary gland? 

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. Sublingual

  2. Submaxillary

  3. Lacrimal

  4. Parotid

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Correct Option: C
Explanation:

'Lacrimal gland' is not a salivary gland.


Stenson's duct is associated with

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. parotid gland

  2. cardiac gland

  3. pancreatic gland

  4. thyroid gland.

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Correct Option: A
Explanation:

Stenson's duct is associated with 'parotid gland'.

So the correct option is A.

About how much saliva does a person produce each day?

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. 100 ml

  2. 250 ml

  3. 500 ml

  4. 1500 ml

Show answer
Correct Option: D
Explanation:

Humans produce between one-fifth and one-third of a gallon (0.75 to 1.5 liters) of saliva every day. However, saliva production mostly takes place while a person is awake. During sleep, saliva production drops to almost nothing. Most of the saliva comes from the glands at the bottom of the mouth, and the rest comes primarily from the parotid glands, near the top back of the mouth.

Numbers of pairs of salivary glands present in rabbit are

bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

  1. One

  2. Three

  3. Four

  4. Five

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Correct Option: C
Explanation:

The rabbit has four major pairs of salivary glands: the parotid, mandibular, sublingual and zygomatic. Amylase and galactosidase are produced in the saliva, which is produced continuously by the mandibular glands and in response to food intake by the others.