Students of class 11 Biology should refer to MCQ Questions Class 11 Biology Digestion and Absorption with answers provided here which is an important chapter in Class 11 Biology NCERT textbook. These MCQ for Class 11 Biology with Answers have been prepared based on the latest CBSE and NCERT syllabus and examination guidelines for Class 11 Biology. The following MCQs can help you to practice and get better marks in the upcoming class 11 Biology examination

Chapter 16 Digestion and Absorption MCQ with Answers Class 11 Biology

MCQ Questions Class 11 Biology Digestion and Absorption provided below have been prepared by expert teachers of grade 11. These objective questions with solutions are expected to come in the upcoming Standard 11 examinations. Learn the below provided MCQ questions to get better marks in examinations.

Question. How many oxygen molecules can a single molecule of hemoglobin transport at a time?
(a) One
(b) Eight
(c) Four
(d) Five

Question. Which of the following is not correct about the thoracic chamber in humans?
(a) It is an air tight chamber in which lungs are situated.
(b) It is formed ventrally by sternum and dorsally by ribs.
(c) It is formed on the lower side by the dome shaped diaphragm.
(d) Both 1 and 3.

Question. The contraction of internal intercostal muscles takes place during?
(a) Effortless inhalation.
(b) Effortless exhalation
(c) Effortful inhalation
(d) Effortful exhalation

Question. Select the set of medullary respiratory centers in brain?
(a) Chemo-sensitive area and respiratory rhythm center.
(b) Respiratory rhythm center and pneumotaxic.
(c) Chemo-sensitive area and pneumotaxic center.
(d) Pneumotaxic center and vomit center.

Question. A person has exhaled fourcefully. The amount of air present in his lungs is.
(a) 0 liters
(b) 3 liters
(c) 1.2 liters
(d) 0.5 liters

Question. If Expiratory Reserve Volume = A, Residual Volume=B, Tidal Volume = C and Inspiratory Reserve Volume = D, then Functional Residual Capacity (FRC) is equal to
(a) A + B
(b) A+B+C
(c) B+D
(d) A+B+D

Question. Inspiration occurs when:
(a) the volume of the lung increases while the pressure in the lung decreases.
(b) the volume of the lung decreases while the pressure in the lung increases.
(c) the volume of the lung increases while the pressure in the lung increases.
(d) the volume of the lung decreases while the pressure in the lung decreases.

Question. Hamburger’s phenomenon involves:
(a) The influx of chlorides ions into erythrocytes in response to efflux of bicarbonate ions from erythrocytes.
(b) efflux of chlorides ions into erythrocytes in response to influx of bicarbonate ions from erythrocytes.
(c) The influx of chlorides ions into erythrocytes in response to influx of bicarbonate ions from erythrocytes.
(d) efflux of chlorides ions into erythrocytes in response to efflux of bicarbonate ions from erythrocytes.

Question. Which one of the following statements is correct regarding blood pressure?
(a) 130/90 mm Hg is considered high blood pressure and requires treatment
(b) 100/55 mm Hg is considered an ideal blood pressure
(c) 105/50 mm Hg makes one very active
(d) 190/110 mm Hg may harm vital organs like brain and kidney

Question. Allergy is due to the release of which chemical from mast cells and basophils?
A. Histamine
B. Heparin
C. Serotonin
(a) A only 
(b) A & B
(c) A & C 
(d) B & C

Question. Which of the following statement is correct about heart failure?
(a) a condition in which heart stops beating.
(b) when the heart muscle is suddenly damaged by an adequate blood supply.
(c) congestion of the lungs is one of the main symptoms of this disease.
(d) chest pain appears when no enough O₂ is reaching to the heart muscles.

Question. Select the correct match from the following:
(a) Albumin: helps to maintain osmotic balance
(b) Globulin: helps to provide immunity
(c) Fibrinogen helps to : prevent blood loss
(d) All of the above

Question. The tallest positive wave in an ECG represents:
(a) Atrial depolarization
(b) Ventricular depolarization
(c) Atrial repolarization
(d) Ventricular repolarization

Question. Match the following and select the correct options-:

P. Neutrophils	A. Heparin and Histamine
Q. Basophils	B. Antibody formation
R. Acidophils	C. Anti-allergic
S. Lymphocytes	D. Phagocytes

(a) P-(D), Q-(A), R-(C), S-(B)
(b) P-(A), Q-(D), R-(C), S-(B)
(c) P-(C), Q-(D), R-(B), S-(A)
(d) P-(B), Q-(A), R-(C), S-(D)

Question. Read the following statements (A-D).
A. QRS complex in an ECG indicates ventricular depolarization .
B. The electrocardiograph machine is used to obtain Electrocardiogram ( ECG) on graph paper.
C. During a cardiac cycle the left ventricle pumps out about 70ml of oxygenated blood which is called the cardiac output.
D. The second heart sound is associated with the closure of the semilunar valves.
How many statements from the above is/are incorrect?
(a) Two
(b ) One 
(c) Four
(d) Three

Question. Which of the following is not a component of human saliva?
(a) Electrolytes Na⁺ ,K⁺, Cl^–and HCO₃ ions.
(b) Ptyalin
(c) Mucin, lysozyme and thiocyanate ions
(d) Antibody IgM

Question. The back flow of faecal matter from the large intestine into the small intestine is prevented by the presence of –
(a) Sphincter of Oddi
(b) Ileo-caecal valve
(c) Gastric-oesophageal sphincter
(d) Pyloric sphincter

Question. The abnormal frequency of bowel movement and increased liquidity of faecal discharge is known as: 
(a) Diarrhoea 
(b) Constipation
(c) Indigestion 
(d) Vomiting

Question. The enzymes that are present in the saliva are
(a) Ptyalin, sucrase and amylase
(b) Lysozyme, amylase and zymase
(c) Amylase, sucrase, and ptyalin
(d) Ptyalin and lysozyme

Question. Which of the following statements are correct:
I. Renin is a proteolytic enzymes found in gastric juice of infants which helps in the digestion of milk proteins.
II. No significant digestive activity occurs in the large intestine.
III. The egestion of faeces to the outside through the anal opening is a voluntary process and is carried out by a mass peristaltic movement.
IV. Ejection of stomach contents through the mouth is a reflex action controlled by the vomiting center in the medulla.
(a) I, II, and IV
(b) II, III, and IV
(c) III and IV
(d) II and III

Question. The first site for observing chyme in the human gut is?
(a) Buccal cavity
(b) Duodenum
(c) Stomach
(d) Colon

Question. Brunner’s glands are
(a) present in the ileum and is a secondary lymphatic tissue storing lymphocyte
(b) present in the duodenum and is a secondary lymphatic tissue storing lymphocytes.
(c) present in the ileum and secret an alkaline mucosa fluid.
(d) present in the duodenum and secret an alkaline mucosa fluid.

Question. Although much carbon dioxide is carried in the blood, yet blood does not become acidic because-
(a) CO₂ is continously diffused through the tissues and is not allowed to accumulate
(b) CO₂ combines with water to form H₂CO₃, which is neutralized by Na₂CO₃
(c) In CO₂ transport, blood buffer plays an important role
(d) CO₂ is absorbed by leucocytes

Question. During oxygen transport, the oxyhaemoglobin at the tissue level liberates oxygen to the cells because of:-
(a) Low [O₂ ] and Low [CO₂]
(b) High [O₂ ] and High [CO₂]
(c) Low [O₂ ] and High [CO₂]
(d) High [O₂ ] and Low [CO₂]

Question. How many of the following factors shifts the oxygen dissociation curve to the right?
1. Low partial pressure of oxygen
2. High concentration of CO₂
3. High concentration of hydrogen ions
4. Low body temperature
5. Daily exercise
6. Haemoglobin of babies or fetal haemoglobin
(a) 6 
(b) 5 
(c) 4 
(d) 3

Question. Optimum pH of saliva is :-
(a) 6.8
(b) 8.6
(c) 7
(d) 9.5 

Question. Enterokinase is :-
(a) Pancreatic hormone
(b) Intestinal hormone
(c) Pancreatic enzyme
(d) Component of intestinal juice 

Question. The wall of alimentary canal from stomach to rectum posses four layers. The sequence of these layers from outside to inside is :-
(a) Serosa → Mucosa → Submucosa → Muscularis
(b) Mucularis → Serosa → Mucosa → Submucosa
(c) Serosa → Muscularis → Mucosa → Submucosa
(d) Serosa → Muscularis → Submucosa → Mucosa 

Question. Find out the correct matching between the cells of gastric gland and their respective secretory products:-

Column-I	Column-II
A Mucus neck cells	I HCl, Intrinsic factor
B Peptic/Chief cells	II Mucus
C Parietal/Oxyntic cells	III Pepsinogen

(a) A-II, B-III, C-I
(b) A-III, B-II, C-I
(c) A-I, B-II, C-III
(d) A-II, B-I, C-III 

Question. Find out the correct sequence of substrate, enzyme and product :-
                                              _Pepsin
(a) Small intestine : Proteins     →      Amino acids
                               _Lipase    
(b) Stomach : Fats     →    Micelles
                                              _Trypsin
(c) Duodenum : Triglycerides      →     Monoglycerides
                                       _a-Amylase
(d) Small intestine : Starch   →    Maltose 

Question. The below diagram represents the TS of gut. Identify A, B, C and D :- 

(a) A – Serosa; B – Muscularis; C – Submucosa; D – Mucosa
(b) A – Muscularis; B – Serosa; C – Submucosa; D – Mucosa
(c) A – Serosa; B – Muscularis; C – Mucosa; D – Submucosa
(d) A – Serosa; B – Submucosa; C – Muscularis; D – Mucosa   

Question. The secretion of the brush border cells along with secretions of goblet cells present in the mucosa of small intestine constitutes :-
(a) Chyme
(b) Chyle
(c) Succus entericus
(d) Gastric juice 

Question. First step in digestion of fat in intestine is :-
(a) Emulsification
(b) Enzyme action
(c) Absorption by lacteals
(d) Storage in adipose tissue