MCQ Questions Chapter 16 Digestion and Absorption Class 11 Biology

Please refer to MCQ Questions Chapter 16 Digestion and Absorption Class 11 Biology with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 11 Biology issued for the current academic year. We have provided MCQ Questions for Class 11 Biology for all chapters on our website. Students should learn the objective based questions for Chapter 16 Digestion and Absorption in Class 11 Biology provided below to get more marks in exams.

Chapter 16 Digestion and Absorption MCQ Questions

Please refer to the following Chapter 16 Digestion and Absorption MCQ Questions Class 11 Biology with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 16 Digestion and Absorption Class 11 Biology

Question- The main function of lacteals in the villi of small intestine is the absorption of
(a) amino acids and glucose
(b) glucose and vitamins
(c) water and mineral salts
(d) fatty acids and glycerol

Question- Which of the following statements is correct regarding absorption of fatty acids?
(a) It is absorbed into the bloodstream at the small intestine.
(b) It is absorbed into the lymph vessels at the small intestine.
(c) It is absorbed into the lymph vessels from the blood stream.
(d) It is absorbed into the bloodstream at the large intestine.

Question- Which of the following is not the function of digestive system?
(a) It allows your body to get the nutrients and energy it needs from the food you eat.
(b) It breaks down large food molecules into smaller molecules that can be used by cells.
(c) It converts foods to larger substances that can be absorbed and used by the cells of the body.
(d) It converts food into soluble and diffusible products that can be absorbed by the blood.

Question- ____i_____ is a diseased condition in which a person passes out watery stool frequently while ______ii_______ is known as infrequent elimination of dry stool.
(a) i- Constipation, ii- Diarrhoea
(b) i- Diarrhoea, ii- Constipation
(c) i- Diarrhoea, ii- Vomiting
(d) i- Constipation, ii- Vomiting

Question- Which of the following statements is correct regarding chylomicrons ?
(a) They are undigested proteins.
(b) They are undigested carbohydrates.
(c) They are fat droplets coated with phospholipids.
(d) They are fat droplets coated with glycerol and proteins.

Question- In case of taking food rich in lime juice, the action of ptyalin on starch is
(a) enhanced
(b) reduced
(c) unaffected
(d) stopped

Question- The given pair represent substrate-enzyme pair. Which of the following pair is (are) correct?
A. Maltose – Lactase
B. Protein – Pepsin
C. Carbohydrate – Lipase
D. Casein – Renin
(a) A and B only
(b) B and C only
(c) A and D only
(d) B and D only

Question- Which of the following statement is incorrect ?
(a) Brunner’s glands are submucosal.
(b) Rugae are the irregular folds of inner gastric mucosa.
(c) Glisson’s capsule is the connective tissue sheath of hepatic lobule.
(d) Mesothelium or serosa lies in close proximity of the sub-mucosa.

Question- Which of the following is not the function of HCl in stomach?
(a) Breaking down proteins into peptones.
(b) Killing the bacteria ingested with food and drinks.
(c) Promoting the formation of pepsin.
(d) Softening fibrous food elements.

Question- Identify the correct set which shows the name of the enzymes from where it is secreted and substrate upon which it acts
(a) Pepsin – Stomach wall – Protein
(b) Ptyalin – Intestine – Maltose
(c) Chymotrypsin – Salivary gland –Lactose
(d) Ptyalin – Pancreas – Lipid

Question- Which one of the following statements is true regarding digestion and absorption of food in humans?
(a) About 60% of starch is hydrolysed by salivary amylase in our mouth.
(b) Oxyntic cells in our stomach secrete the proenzyme pepsinogen.
(c) Fructose and amino acids are absorbed through intestinal mucosa with the help of carrier ions like Na+.
(d) Chylomicrons are small lipoprotein particles that are transported from intestine into blood capillaries.

Question- Jaundice may be caused by retarded function of —
(a) lungs
(b) kidneys
(c) heart
(d) liver

Question- Which of the following statements is incorrect?
(a) Saliva lubricates the food.
(b) Tongue helps in chewing of food.
(c) Salivary glands have protein digesting enzymes.
(d) Bile does not contain any digestive enzymes.

Question- If pH of stomach is 7 then which component of food would be affected?
(a) Starch
(b) Protein
(c) Fat
(d) Sucrose

Question- Which of the following statements are true regarding human digestive system?
(i) Food is not digested in the gullet.
(ii) There is no digestive juice in the mouth.
(iii) Food is digested completely in the stomach.
(iv) The large intestine is shorter than the small intestine.
(v) Inside the large intestine, most of the water from the undigested food is absorbed by the body.
(a) (i) and (ii) only
(b) (iii) and (v) only
(c) (i), (iv) and (v) only
(d) (ii), (iii) and (iv) only

Question- Choose the correct matching pair.
(a) Renin – Protein
(b) Trypsin – Starch
(c) Invertase – Sucrose
(d) Amylase – Lactose

Question- A person who is on hunger strike and is surviving only on water, will have
(a) less amino acids in his urine.
(b) more glucose in his blood.
(c) less urea in his urine.
(d) more sodium in his urine

Question- During prolonged fasting
(a) first fats are used up, followed by carbohydrates from liver and muscles and proteins in the end.
(b) first carbohydrates are used up, followed by fat and proteins towards end.
(c) first lipids, followed by proteins and carbohydrates towards end.
(d) none of the above.

Question- What will happen if bile duct gets choked ?
(a) Faeces become dry.
(b) Acidic chyme will not be neutralized.
(c) There will be little digestion in intestine.
(d) Little digestion of fat will occur.

Question- Select the correct match of the digested products in humans with their absorption site and mechanism.
   Column-I                              Column-II
(a) Fructose, Na⁺           –    Small intestine, passive absorption
(b) Glycerol, fatty acids  –    Duodenum, move as chylomicrons
(c) Cholesterol, maltose –    Large intestine, active absorption
(d) Glycine, glucose       –    Small intestine, active absorption

Question- Match column I (organs) with column II (functions) and choose the correct option.
Column-I                      Column-II
(Organs)                        (Functions)
A. Mouth                  I. Reclaims water and salts
B. Stomach              II. Carries out most of the digestion and absorption of nutrients.
C. Small intestine      III. Releases amylase enzyme that break down carbohydrates.
D. Large intestine     IV. An acidic compartment that begins to break proteins into larger polypeptides.
(a) A – I; B – II; C – III; D – IV
(b) A – III; B – IV; C – II; D – I
(c) A – II; B – III; C – I; D – IV
(d) A – IV; B – I; C – II; D – III

Question- What is common among amylase, renin and trypsin?
(a) All are proteins.
(b) All are proteolytic enzymes.
(c) Produced in stomach.
(d) Act at pH lower than 7.

Question- Match column I (food type) with column II their (enzymes) and choose the correct option.
Column-I                Column-II
(Food type)           (Enzymes)
A. Starch             I. Nucleases
B. Protein            II. Lipase
C. Fats                 III. Amylase
D Nucleic acid     IV. Trypsin
(a) A – III; B – IV; C – II; D – I
(b) A – I; B – II; C – III; D – IV
(c) A – II; B – III; C – IV; D – V
(d) A – IV; B – I; C – II; D – III

Question- Which of the following statements is correct regarding enterokinase?
(a) It is a hormone that prevents the secretion of gastric juice.
(b) It is an enzyme that activates the enzymes of pancreatic juice.
(c) It is an enzyme that activates the proteolytic enzymes of succus entericus.
(d) It is a hormone that prevents the secretion of pancreatic juice.

Question- Which of the following monomers are produced, when lipids are broken down by lipase?
A. Nucleotides
B. Amino acids
C. Glycerol
D. Fatty acids
(a) A and C only
(b) C and D only
(c) C only
(d) D only

Question- Under which of the following circumstances will insulin be secreted?
(a) The blood sugar level in the liver is low.
(b) The blood sugar level in the hepatic portal vein is low.
(c) The blood sugar level in the islets of Langerhans is high.
(d) The glycogen level in the skeletal muscle is high.

Question- Match the following organic molecules given in column I with their correct description given in column II and then choose the correct option.
Column-I                            Column-II
(Organic molecules)         (Description)
A. Carbohydrates          I. It is made of fatty acids and glycerol
B. Proteins                   II. It is mostly ingested in the form of starch
C. Nucleic acids            III. It is built of long chains of amino acids
D. Lipids                      IV. It is made of ribose or deoxyribose sugars and nitrogenous bases.
(a) A – I; B – II; C – III; D – IV
(b) A – IV; B – I; C – II; D – III
(c) A – III; B – IV; C – I; D – II
(d) A – II; B – III; C – IV; D – I

Question- If the epiglottis does not function correctly, then what will happen to the human being ?
(a) One might congest.
(b) Peristalsis will discontinue.
(c) Acid reflux disease will damage the oesophagus.
(d) Swallowing will be difficult or impossible.

Question- Which of the following substances involved in organic molecule digestion is correctly matched with their descriptions?
(a) Salivary amylase- It begins lipid digestion in mouth.
(b) Trypsin- It emulsifies fats for digestion.
(c) Bile- It digests proteins in small intestine.
(d) Maltase- It is a brush border enzyme that acts on disaccharides.

Question- Which of the following is the correct chronological order for flow of food from mouth to anus?
(a) Oesophagus → Stomach → Small intestine → Large intestine
(b) Large intestine → Oesophagus → Stomach → Small intestine
(c) Small intestine → Large intestine → Oesophagus → stomach
(d) Stomach → Small intestine → Large intestine → Oesophagus

Question- How do nutrients, absorbed by the small intestine, travel to the individual cells of the human body?
(a) The nutrients are absorbed from the small intestine into the blood and move through the circulatory system to the body cells.
(b) The nutrients move from the small intestine directly to the liver and then move through the lymphatic system to the body cells.
(c) The small intestine forces the nutrients into the kidneys, where the nutrients are then dissolved in fluids used by the body cells.
(d) The body cells send nerve impulses indicating a lack of nutrients to the small intestine, and the small intestine sends the nutrients back to the cells.

Question- From deep to superficial, what are the tunics of the intraperitoneal portions of the alimentary canal?
(a) Serosa, muscularis, submucosa and mucosa
(b) Mucosa, submucosa, muscularis and serosa
(c) Adventia, muscularis, submucosa and mucosa
(d) Mucosa, submucosa, muscularis and adventia

Question- Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?
(a) Salivary maltase → Carboxypeptidase → Trypsinogen
(b) Pancreatic amylase → Salivary amylase → Lipases
(c) Disaccharidase like maltase → Lipases → Nucleases
(d) Salivary amylase → Pancreatic amylase → Disaccharidases

Question- If for some reason our goblet cells becomes nonfunctional then this will adversely affect
(a) production of somatostatin.
(b) secretion of sebum from the sebaceous glands.
(c) maturation of sperms.
(d) smooth movement of food down the intestine.

Question- The digestion of butter begins with
(a) saliva
(b) gastric juice
(c) pancreatic juice
(d) intestinal juice

Question- Which of the following statements are correct regarding jaundice?
(i) It indicates liver damage.
(ii) It involves infrequent elimination of dry stool.
(iii) It involves yellowing of skin and eyes.
(iv) It increases absorption of food.
(a) (i) and (ii) only
(b) (i) and (iii) only
(c) (i), (ii) and (iii) only
(d) (i), (iii) and (iv) only

Question- Removal of gall bladder in man would lead to
(a) impairment of digestion of fats.
(b) impairment of digestion of protein.
(c) jaundice
(d) increased acidity in intestine.

Question- A healthy person eats the following diet – 5 gm raw sugar,4 gm albumin, 10 gm pure buffalo ghee adultrated with 2 gm vegetable ghee (hydrogenated vegetable oil) and 5 gm lignin. How many calories he is likely to get?
(a) 144
(b) 126
(c) 164
(d) 112

Question- If the large intestine becomes irritated and peristalsis increases then which of the following will result?
(a) Indigestion
(b) Diarrhoea
(c) Constipation
(d) Vomiting

Question- Match the following digestive processes given in column I with their correct description given in column II and then choose the correct option.
Column-I                                Column-II
(Digestive processes)         (Description)
A. Ingestion                      I. Elimination of digestible solids.
B. Mechanical digestion   II. Enzymatic degradation of food stuffs into simpler molecules.
C. Chemical digestion      III. Taking food into the digestive systems
D. Defecation                   IV. Chewing, mixing, churning and segmentation of food.
(a) A – I; B – II; C – III; D – IV
(b) A – IV; B – I; C – II; D – III
(c) A – III; B – IV; C – II; D – I
(d) A – I; B – III; C – IV; D – II

Question-If the chyme of a person who had orally consumed only starch as food is analysed before it enters the duodenum, it will show the presence of
(a) maltose and glucose
(b) dextrin and maltose
(c) starch, dextrin and maltose
(d) starch, dextrin and glucose

Question- What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
(a) Enterokinase will not be released from the duodenal mucosa and so trypsinogen is not converted into trypsin.
(b) Gastric juice will be deficient in chymosin.
(c) Gastric juice will be deficient in pepsinogen.
(d) In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin.

Question- If the parietal cells of the gut epithelium become partially non-functional, what is likely to happen?
(a) The pancreatic enzymes, specially the trypsin and lipase will not work efficiently.
(b) The pH of stomach will fall abruptly.
(c) Steapsin will be more effective.
(d) Proteins will not be adequately hydrolysed by pepsin into proteases and peptones.

Question- Which of the following occurs in the duodenum?
(a) Absorption of vitamins and minerals.
(b) Mixing of food with pancreatic juice and bile.
(c) Mastication of food.
(d) Absorption of water.

Question- Which of the following statement is true ?
(a) Pepsin cannot digest casein.
(b) Trypsin can digest collagen.
(c) Pepsin cannot digest collagen.
(d) Chymotrypsin can digest casein.

Question-The hydrochloric acid secreted by the gastric glands activates the enzyme _____i_____ while the _____ii_____ secreted by gastric glands protects the lining of the stomach from the action of acid.
(a) i- pepsin, ii- mucus
(b) i- pepsin, ii- trypsin
(c) i- amylase, ii- trypsin
(d) i- amylase, ii- rennin

Question- Which digestive processes takes place in the mouth?
(a) Both chemical and physical digestion.
(b) Chemical digestion only.
(c) Physical digestion only.
(d) Neither chemical nor physical digestion.

Question- Which part is infected when a person is suffering from diarrhoea ?
(a) Small intenstine
(b) Large intestine
(c) Stomach
(d) None of these

Question- Which process transported the bolus into the pharynx and then into the oesophagus?
(a) Deglutition
(b) Peristalsis
(c) Vomiting
(d) All of these

Question- What happens to the food when it enters from oesophagus to stomach?
(a) Food mixes with juices and protein digestion starts.
(b) Food mixes with juices and carbohydrate digestion starts.
(c) Food quickly moves into small intestine.
(d) Food quickly moves into large intestine.

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