Class 11 Biology MCQ Questions of Digestion and Absorption with Answers available here. These CBSE MCQ Questions for Class 11 have been created and are accessible free for the advantage of Class 11 students. Practicing MCQ Questions for class 11 Biology with Answers will help students to aim the Board and competitive exams confidently.

The MCQ Questions for class 11 Biology with answers have been prepared as per the latest Biology syllabus, books and examination pattern. Multiple Choice Questions are important parts of competitive exams as well as Board exams and if practiced properly can help you to get higher rank.

Practice MCQ Questions for class 11 Biology Chapter-Wise

1. Duct leading from parotid gland and opening into vestibule is

(a) Wolffian duct
(b) Stensons duct
(c) Haversian duct
(d) Infra-orbit duct

2. Which organ is most affected by jaundice?

(a) Pancreas
(b) Liver
(c) Stomach
(d) Intestine

3. Small projections of upper surface of tongue are called

(a) fimbriae
(b) pilli
(c) papillae
(d) cilia

4. Sweetest sugar is

(a) Fructose
(b) Sucrose
(c) Glucose
(d) Lactose

5. Which of the following part of human intestine hosts microorganisms?

(a) Colon
(b) Caecum
(c) Anus
(d) Rectum

6. Enterokinase helps in the conversion of

(a) Lactose to Sucrose
(b) Trypsinogen into trypsin
(c) Pepsinogen into pepsin
(d) Proteins into polypeptide

7.  Nyctalopia can occur due to the deficiency of

(a) Vitamin A
(b) Vitamin C
(c) Vitamin K
(d) Vitamin B2

8. Chymosin is also known as........

(a) Lipase
(b) Amylase
(c) Trypsin
(d) Rennin

9. ..................is a protein deficiency disorder

(a) Scurvy
(b) Anaemia
(c) Kwashiorkor
(d) None of the above

10. A dental condition that is characterized by hyper mineralization of teeth enamel due to excessive intake of ........... The teeth often appear mottled.

(a) Sodium
(b) Calcium
(c) Fluoride
(d) Mercury

11. A young infant may be feeding entirely on mother's milk, which is white in color but the stools, which the infant passes out is quite yellowish. What is this yellow colour due to? 

(a) Intestinal juice
(b) Bile pigments passed through bile juice
(c) Undigested milk protein casein
(d) Pancreatic juice poured into duodenum

12. Anxiety and eating spicy food together in an otherwise normal human may lead to  

(a) indigestion
(b) jaundice
(c) diarrhoea
(d) vomiting

13. Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of 

(a) diaphragm
(b) neck
(c) tongue
(d) epiglottis

14. When breast feeding is replaced by less nutritive food low in proteins and calories; infants below the age of one year are likely to suffer from 

(a) marasmus
(b) rickets
(c) kwashiorkor
(d) pellagra

15. Secretion of gastric juice is stopped by 

(a) gastrin
(b) pancreozymin
(c) cholecystokinin
(d) enterogasterone

16. The structural and functional units of the human liver are:-

(a) Glisson capsules
(b) Hepatic lobes
(c) Hepatic Iobules
(d) Hepatic sinusoids

17. What prevents the back flow of the fecal matter into the small intestine?

(a) Ileo-caecal valve
(b) Sphincter of Boyden
(c) Meckel's diverticulum
(d) Plicae semilunaris

18. Which is sweet in taste but is not sugar-

(a) Starch
(b) Saccharine
(c) Lactose
(d) Protein

19. Parietal cells of mucosa in the stomach is secrets :

(a) Mucin
(b) Pepsin
(c) Dilute HCl
(d) All of the Above

20. Enamel of teeth is secreted by:

(a) Ameloblast
(b) Odontoblast
(c) Osteoblast
(d) Osteoclast

21. Cholesterol is synthesised in 

(a) Brunner’s glands 
(b) Liver
(c) Spleen
(d) Pancreas

22. Which part of teeth possesses nerve and blood vessel?

(a) Pulp
(b) Dentin
(c) Crown
(d) All of above

23. The production of pancreatic juice and bicarbonate is stimulated by which hormone?

(a) Insulin and glucagon
(b) Cholecystokinin and secretin
(c) Gastrin and insulin
(d) Angiotensin and epinephrine

24. Muscular contractions of alimentary canal are 

(a) Circulation
(b) Deglutition
(c) Churning
(d) Peristalsis

25. In frogs, the surface of attachment of tongue is

(a) Hyoid apparatus
(b) Pterygoid
(c) Palatine
(d) Sphenoid

Answer:

 1. Answer: (b) Stensons duct

Explanation: Parotid glands are the largest salivary glands. The parotid ducts, also called Stenson's ducts, open into the vestibule opposite the upper second molar teeth.

2. Answer: (b) Liver

Explanation: The liver is the most affected organ by jaundice. Jaundice refers to the yellowing of the skin, soft tissues, and mucus membranes in our body such as the sclera of eyes, nails, palm, etc. due to the abnormal definition of bile pigments (hyperbilirubinemia).

3. Answer:  (c) papillae

Explanation:  The taste receptors are located around the small structures known as papillae found on the upper surface of the tongue, soft palate, upper oesophagus, the cheek, and epiglottis.

4. Answer:  (a) Fructose

Explanation: Fructose is the sweetest sugar. Glucose is the most common monosaccharide, a subcategory of carbohydrates.

5. Answer: : (b) Caecum

Explanation: Digestive Processes of the Large Intestine. In the large intestine, a host of microorganisms known as gut flora help digest the remaining food matter and create vitamins.

6. Answer: (b) Trypsinogen into trypsin

Explanation: The enzyme enterokinase which is also known as enteropeptidase helps in the conversion of trypsinogen into trypsin. Trypsin acts on proteins and breaks them for digestion. It occurs in the brush borders of duodenum.

7.  Answer: (a) Vitamin A

Explanation: Xerophthalmia is a term used to describe the spectrum of ocular disease that can arise from vitamin A deficiency. These changes include dry eye (xerosis), corneal ulceration and melting (kerotomalacia), night blindness (nyctalopia), and retinopathy.

8. Answer: (d) Rennin

Explanation: Rennin, also called chymosin, a protein-digesting enzyme that curdles milk by transforming caseinogen into insoluble casein; it is found only in the fourth stomach of cud-chewing animals, such as cows.

9. Answer:  (c) Kwashiorkor

Explanation: The most severe form of protein deficiency is known as kwashiorkor. It most often occurs in children in developing countries where famine and imbalanced diets are common. Protein deficiency can affect almost all aspects of body function. As a result, it is associated with many symptoms.

10. Answer:  (c) Fluoride

Explanation: Dental fluorosis is a common disorder, characterized by hypomineralization of tooth enamel caused by ingestion of excessive fluoride during enamel formation.

11. Answer:  (b) Bile pigments passed through bile juice

Explanation: The yellow colour of the stools is because of the presence of bile salts. Bile colors are actually excretory substances. The bile is a bitter-tasting, greenish-yellow in colour, an antacid fluid that is produced by the liver and temporarily stored in the gallbladder and is then discharged into the duodenum.

12. Answer:  (a) indigestion

Explanation: Indigestion is a disorder of the small intestine and is characterized by improper digestion of food. It may be due to decreased secretion of digestive enzymes or food poisoning or overeating or anxiety or intake of spicy food. Diarrhoea is a disorder of the large intestine.

13. Answer:  (d) epiglottis

Explanation: Due to improper movement of the epiglottis, one may suddenly start coughing while swallowing some food. The epiglottis is a flap that is made of elastic cartilage tissue covered with a mucous membrane, attached to the entrance of the larynx. It prevents the entry of food into the larynx and directs it to the oesophagus.

14. Answer:  (a) marasmus

Explanation: If this milk is replaced by low nutritive food like diluted cow milk, the child may suffer from disease. Since it contains less proteins and other calories. Among the given options, marasmus occurs in the child less than one year, due to the deficiency of the protein in the body.

15. Answer: (d) enterogasterone

Explanation:  An enterogastrone is any hormone secreted by the mucosa of the duodenum in the lower gastrointestinal tract in response to dietary lipids that inhibits the caudal (or "forward, analward") motion of the contents of chyme. 

16. Answer:  (c) Hepatic Iobules

Explanation:  The structural and functional units of the liver are called hepatic lobules.

17. Answer:  (a) Ileo-caecal valve

Explanation: The backflow of faecal matter into the small intestine from the large intestine is also prevented by the ileocecal valve. The sphincter enables material to travel from the esophagus to the stomach when swallowing, but serves in resting conditions as a barrier for reflux of gastric contents.

18. Answer: (b) Saccharine

Explanation: Saccharin is an artificially synthesized sweetening agent which is widely used in the food and beverage industries. That's why we can say that the saccharin is sweet in taste but it is not sugar.

19. Answer: (c) Dilute HCl

Explanation: Parietal cells (also known as oxyntic cells) are epithelial cells in the stomach that secrete hydrochloric acid (HCl) and intrinsic factor. These cells are located in the gastric glands found in the lining of the fundus and body regions of the stomach.

20. Answer:  (a) Ameloblast

Explanation: Ameloblasts are cells that secrete the enamel proteins enamelin and amelogenin which will later mineralize to form enamel, the hardest substance in the human body.

21. Answer:  (b) Liver

Explanation:  The majority of cholesterol utilized by healthy adults is synthesized in the liver, which produces ~\(70\%\) of the total daily cholesterol requirement (\(\approx 1\) gram).

22. Answer:  (a) Pulp

Explanation: The root of the tooth extends down into the jawbone. The root contains blood vessels and nerves, which supply blood and feeling to the whole tooth. This area is known as the "pulp" of the tooth.

23. Answer:  (b) Cholecystokinin and secretin

Explanation: Cholecystokinin produces acts on the pancreas as well as gall bladder which stimulates the secretion of pancreatic juice and bile juice respectively. Secretin produced from endocrine cells acts on the exocrine part of the pancreas and thereby stimulates the secretion of water and bicarbonate ions.

24.Answer:  (d) Peristalsis

Explanation: Peristalsis is a series of wave-like muscle contractions that move food through the digestive tract.

25. Answer:  (a) Hyoid apparatus

Explanation: In adult frog, gills disappear and their skeletal framework is also reduced to form hyoid apparatus. It lies below tongue in the floor of mouth and provides surface of attachment to the tongue. Pterygoid contributes to the postero-ventral margin of orbit of its side.

Click here to practice Digestion and Absorption MCQ Questions for Class 11