MCQ ON DIGESTION OF CARBOHYDRATES class 12 for NEET | DIGESTION OF CARBOHYDRATES class 12 | MCQ DIGESTION OF CARBOHYDRATES with Answer | Check the below NCERT MCQ question for class 12 Biology based on the with Answers.
MCQ on DIGESTION OF CARBOHYDRATES class 12 Biology with answers were prepared based on the latest pattern.We have provided class 12 Biology MCQs question with Answers to help students understand the concept very well.
MCQ ON DIGESTION OF CARBOHYDRATES is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM/ KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2022-2023,2024
DIGESTION OF CARBOHYDRATES
Human food contains three types of carbohydrates namely polysaccharide, oligosaccharides and disaccharides which need digestion.
The polysaccharide include starch, glycogen and cellulose .
The oligosaccharides include dextrins.
The disaccharides are sucrose cane sugar and lactose milk sugar.
These are digested by carbohydrates to monosaccharides glucose, fructose and galactose.
Buccal cavity:-the food receives saliva in the buccal cavity.
The human digestive glands include salivary gland, gastric glands, liver, Pancreas and intestinal glands.
1.Salivary glands :- There are three pairs of salivary glands:
Parotid glands, sublingual glands and submaxillary glands or submandibular
Parotid glands:-These are the largest salivary glands.They lie on the sides of the facts , just below and infront of the ears.
Sublingual glands:- Thes lie under the front part of the tongue.The sublingual ducts ,also termed as ductus of Rivinus also open under the tongue.
These lie at the angles of lower jaw.The submaxillary ducts also known as Wharton’s ducts , open under the tongue.
The salivary glands secrets a viscous fluid called saliva.It contains water, salts , mucin and an enzyme salivary amylase or ptyalin. Its pH is nearly neutral being 6.7.
The slavery glands are under neural control, Salivation is activated by the sight , smell ,idea and talk of food and by the presence of food in the buccal cavity.
Functions of saliva:- It moistens and lubricates the buccal mucosa, tongue and lips.
It also moistens food and changes it to semi solid mass for easy swallowing.
Gastric glands:-the gastric glands are microscopic simple tubular glands In the wall of stomach. They have three more common types of gland cells.
Peptic cells that are usually basal in location and produce enzymes.
Oxyntic cells that secret HCl.
Mucous cells which add mucus.
The three secretions together form an acidic gastric juice pH 2. It is discharged into the stomach.
Liver:- Liver is the largest gland in the body. It consists of two main lobes:
Large right lobe and much smaller left lobe.Two small lobe called quadrate lobe.
Liver consists of small structural and functional unit called lobules.Kupffer cells are found in liver.
The pancreas is an elongated yellowish gland lying partly behind the stomach in the abdomen.It consists of head, body and tail.
The intestinal glands are numerous and microscopic .They lie in the wall of the small intestine.
They are of 2 types :-
crypts of Lieberkuhn and Brunner’s glands.
Mucous glands:- The mucous glands lubricates the digestive tract so that food slips through it easily.This prevent injury to the delicate mucous membrane.
MCQ THE DIGESTION OF CARBOHYDRATES class 12 for NEET/KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2022-2023,2024
1. Which are the carbohydrates ?
(d) all the above
Ans (d) all the above
2. Which are disaccharides ?
(d) both a and b
Ans. (d) both a and b
3. Which are not monosaccharides ?
Ans. (d) sucrose
4. The food receives saliva in the buccal cavity. The saliva contains enzyme
(a) salivary amylase
(d) all the above
Ans.(d) all the above
5. Salivary digestion of carbohydrates continues in the stomach till ptyalin is destroyed by …………..of the gastric juice.
(a) mucous cells
(b) oxyntic cells
(c) peptic cells
6. Lactose is composed of
(a) glucose + fructose
(b) glucose + glucose
(c) glucose + galactose
(d) fructose + galactose
Ans.(c) glucose + galactose
7. Liver stores
(a) Vitamin A
(b) Vitamin B
(c) Vitamin D
(d) All of these
Ans.(d) All of these
8. Release of pancreatic juice from pancreatic is stimulated by
(d) both a and c
Ans.(d) both a and c
9. Heparin is produced by
(a) kidney cells
(b) blood cells
(c) bone marrow
(d) liver cells
Ans. (d) liver cells
10. Secretin is produced by epithelium of
Ans. (b) Duodenum
11. Gall bladder is absent in
12. Sucrase breaks the double sugar sucrose into single sugars ……….
a) glucose and glucose
b) glucose and fructose
c) glucose and lactose
(d) all of these
Ans . (b) glucose and fructose
13. Lactase hydrolases the double sugar lactose to single sugars
(a) glucose and galactose
(b) glucose and fructose
(c) glucose and maltose
Ans.(a) glucose and galactose
14. Cellulose is digested by an enzyme.
Ans. (a) Cellulases
15. Maltase splits the double sugar Maltase to singer sugar
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16. Which is not digested in humans ?