CBSE Class 11 Digestion and Absorption Worksheet A

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MULTIPLE CHOICE QUESTIONS

Question. The contraction of gall bladder is due to
(a) gastrin
(b) secretin
(c) cholecystokinin
(d) enterokinase
Answer. C

Question. The function of rennin is 
(a) vasodilation
(b) reduce blood pressure
(c) degradation of angiotensinogen
(d) none of the above
Answer. D

Question. Brunner’s glands are present in 
(a) duodenum
(b) oesophagus
(c) ileum
(d) stomach
Answer. A

Question. Which of following teeth are lophodont? 
(a) Incisor and canine
(b) Premolar and molar
(c) Canine and premolar
(d) Premolar and incisor
Answer. B

Question. Which one of the following pairs of the cells with their secretion is correctly matched?
(a) Oxyntic cells - A secretion with pH between 2.0 and 3.0
(b) Alpha cells of Islets of Langerhans -Secretion that decreases blood sugar level.
(c) Kupffer cells - A digestive enzyme that hydrolysis nucleic acids.
(d) Sebaceous glands - A digestive enzyme that hydrolysis nucleic acids
Answer. A

Question. Which match is true? 
Vitamin deficiency Vitamin Source disease
(a) Severe bleeding Tocopherol Milk,egg
(b) Anaemia Ascorbic Lemon, acid orange
(c) Night blindness Retinol Carrot, milk
(d) Sterility Calciferol Milk, butter
Answer. C

Question. A child took sugar cane and sucked its juice.Regarding this which of the following match is correct?
Substrate Enzyme Site of Products of enzyme secretion formed
(a) Proteins Pepsin Duodenum Polypeptides
(b) Starch Amyase Salivary Glucose glands
(c) Lipids Lipase Pancreas Fat globules
(d) Sucrose Invertase Duodenum Glucose + Fructose
Answer. D

Question. Fat present below the skin surface in our body, acts as a barrier against 
(a) loss of heat from the body
(b) loss of essential body fluids
(c) loss of salts from the body
(d) entry of harmful micro-organisms from the environment
Answer. A

Question. The nutritional deficiency condition that needs to be given top priority for remedial action in India today is 
(a) scurvy
(b) rickets
(c) xerophthalmia
(d) pellagra
Answer. C

Question. What is the average fat content of buffalo milk?
(a) 7.2%
(b) 4.5% 
(c) 9.0%
(d) 10.9%
Answer. A

Question. Consumption of fish is considered to be healthy when compared to flesh of other animals because when compared to flesh of other animals, fish contains 
(a) polyunsaturated fatty acids
(b) saturated fatty acids
(c) essential vitamins
(d) more carbohydrates and proteins
Answer. A

Question. Lathyrism is caused by excessive consumption of 
(a) khesari dal
(b) mustard oil
(c) polished rice
(d) mushrooms
Answer. A

Question. The normal temperature of human body on the Kelvin scale is 
(a) 280
(b) 290
(c) 300
(d) 310
Answer. D

Question. Parotid salivary glands are present 
(a) Below the tongue
(b) Below the cheeks
(c) In the angle between two jaws
(d) Below the eye orbits
Answer. B

ASSERTION REASON QUESTIONS

Directions : These questions consist of two statements, each printed as Assertion and Reason.While answering these questions, you are required to choose any one of the following five responses.
(a) If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.
(b) If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.
(c) If the Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.
(e) If the Assertion is incorrect but the Reason is correct.

Question. Assertion : Scurvy is caused by deficiency of vitamin.
Reason : Deficiency of ascorbic acid causes scurvy.
Answer. A

Directions  : Each of these questions contains an Assertion followed by Reason. Read them carefully and answer the question on the basis of following options. You have to select the one that best describes the two statements.
(a) If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
(b) If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
(c) If Assertion is correct but Reason is incorrect.
(d) If both the Assertion and Reason are incorrect.

Question. Assertion : In the condition of obstructive jaundice, large amounts of unabsorbed fats are eliminated out of the body.
Reason : Entry of bile into the small intestine is prevented during obstructive jaundice. 
Answer. A

Question. Assertion : Pancreatic amylase digest starch to maltose. 
Reason : Pancreatic amylase breaks the peptide bond of protein.
Answer. C

Question. Assertion : Trypsin helps in blood digestion of predator animals.
Reason : Trypsin hydrolyzes fibrinogen.
Answer. A

Question. Assertion : Lipases of bile help in the emulsification of fats.
Reason : Lipases can break large fat droplets into smaller ones. 
Answer. D

Question. Assertion : In the condition of obstructive jaundice, large amounts of unabsorbed fats are eliminated out of the body.
Reason : Entry of bile into the small intestine is prevented during obstructive jaundice.
Answer. A

Question. Assertion : Starch is hydrolysed by ptyalin to maltose.
Reason : Sucrase hydrolyses sucrose to lactose.
Answer. C

Question. Assertion : Water and electrolytes are almost fully absorbed in the large intestine.
Reason : In large intestine, haustral contractions (slow segmenting movements) roll the forming faeces over and over, causing absorption of water and electrolytes. 
Answer. A

1. Name the secretions of Goblet cell & parietal cells.

2. Name the three parts of small intestine of man.

3. Which is the largest gland in our body?

4. What is the role of micelles in the fat absorption?

5. Give two functions of trypsin?

6. What are the specific functions of food?

7. How is DNA content in our food digested in the body?

8. How would it affect the digestion of proteins if there is blockade in the pancreatic duct?

9. Draw a labeled diagram of human alimentary canal & Describe its different parts. 

Click on link below to download CBSE Class 11 Digestion and Absorption Worksheet A.