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Digestion And Absorption MCQ Important Questions For NEET and CBSE with their Answer Keys. These MCQ are totally based on NCERT and previous year questions.
Digestion And Absorption is associated with Biology Class 11 and Chapter 16.
Answer Keys of these Digestion And Absorption MCQ Important Questions For NEET and CBSE are also given at the end of this page.
Hope that you will get benefit by solving these Digestion And Absorption MCQ Important Questions For NEET and CBSE.
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Digestion And Absorption MCQ Important Questions For NEET and CBSE
1) Pyloric constriction is the narrowing of portion between?
a) Oesophagus and stomach
b) Pharynx and oesophagus
c) Stomach and duodenum
d) None of the above
2) Release of gastro-intestinal secretion and movement after ingestion of food is brought about by?
a) Sympathetic nervous system
b) Parasympathetic nervous system
c) Central nervous system
d) Thyroid membrane
3) In the empty stomach, mucosal folds appear. They are called?
a) Fiveoles b) Ancinura angularis
c) Rugae d) None
4) The process involving the conversion of solid substances into liquid material finally results in the absorption along the gut wall, they are then incorporated into the cells as complex substances. The process is called?
a) Combination b) Assimilation
c) Absorption d) Defaecation
5) A pound of butter contains more usable energy than a pound of sugar for a human because?
a) Sugar contains much more water than butter
b) A fat molecule has more carbon-hydrogen bonds than a sugar molecule
c) The butter is an animal product, where as the sugar is a plant product
d) There is much more waste in digestion and absorption of sugar than of butter
6) The intestine is different from the stomach by the presence of?
a) Digestive gland b) Villi
c) Sub-mucosa d) Serosa
7) In mammals the lower jaw is made up of?
a) Dentary b) Maxilla
c) Premaxilla d) Palatine
8) The hardest substance of vertebrate body is?
a) Keratin b) Enamel
c) Dentine d) Chondrin
9) On the tongue of rabbit which type of papillae are present but absent in human?
b) Circumvallate and foliate
10) The layer lining the lumen of the human alimentary canal is?
a) Serosa b) Sub-mucosa
c) Muscularis d) Mucosa
11) It is a correct dental formula for the child falling under age group 5-6 yrs.?
a) I2/2, C1/1, PM0/0, M2/2
b) I2/2, C1/1, P M2/2, M3/3
c) I1/1, C2/2, P M2/2, M3/3
d) I2/2, C2/2, P M1/1, M3/3
12) Most abundant mineral of animal body is?
a) Iron b) Sodium
c) Potassium d) Calcium
13) Which element is the cause of etai etai disease?
a) Hg b) Pb
c) Cd d) As
14) Which of the following is not a vitamin deficiency disease?
a) Rickets b) Goitre
c) Beriberi d) Pellagra
15) Thiamine (B1) deficiency results in?
a) Wernickes’ syndromes
b) Korsakoff’s syndromes
d) Tunnel vision
16) Vitamin D is synthesised by one of the following with the help of sunlight?
a) Skin b) Gall bladder
c) Liver d) Pancreas
17) Water soluble vitamins are?
a) Vitamin A, B and C b) Vitamin B and C
c) Vitamins C and D d) None of these
18) Which of the following elements is a constituent of biotin?
a) Magnesium b) Calcium
c) Phosphorus d) Sulphur
19) Which of the following are required in minimum amount by human?
a) Iron, iodine, carbon, manganese, copper, O_2
b) Iron, iodine, manganese, copper, zinc, fluorine
c) Iron, iodine, manganese, zinc, hydrogen d) Nitrogen, oxygen, zinc, fluorine
20) Fat soluble vitamins are?
a) Vitamin A, B and C
b) Vitamin A, B and D
c) Vitamin A, D, E and K
d) Vitamin C and D
21) Vitamin C is?
a) Ascorbic acid b) Nicotinic acid
c) Lipoic acid d) Aspartic acid
22) Term “vitamin” was given by?
a) James Lind b) Sterling
c) Funk d) J. C. Drummond
23) The hormone ‘secretin’ stimulates secretion of?
a) Pancreatic juice b) Bile juice
c) Salivary juice d) Gastric juice
24) Which part of body secretes the hormone secretin
a) Ileum b) Stomach
c) Duodenum d) Oesophagus
25) What is the substrate for lipase enzyme?
a) Protein b) Carbohydrate
c) Lipid d) Nucleic acid
26) Enzyme Rennin is secreted by?
a) Cells of stomach
b) Cells of intestine
c) The cortical cells of kidney
d) The cells of juxtaglomerular apparatus of kidney
27) Digestion of protein takes place in?
a) Duodenum and stomach
b) Stomach and oesophagus
c) Small and large intestine
d) Intestine and rectum
28) Collagen is a?
a) Phosphoprotein b) Globulin
c) Derived protein d) Scleroprotein
29) Salivary amylase is also known as?
a) Ptyalin b) Gastrin
c) Glycoxylase d) Pepsin
30) Tongue is made up of?
a) Voluntary muscles
b) Involuntary muscles
c) Both of these
d) None of these
31) Cystic duct arises from?
a) Liver b) Kidney
c) Pancreas d) Gallbladder
32) Nutrition to the tooth is supplied through?
a) Alveolus b) Enamel
c) Pulp cavity d) All of these
33) Grinding teeth are?
a) Incisors b) Canines
c) Molars d) None of these
34) Milk protein is?
a) Lactogen b) Casein
c) Lactose d) Myosin
35) The excess of amino acids are stored in?
a) Kidney b) Liver
c) Spleen d) None of these
36) An organism that feeds on dead organic matter other than bacteria or fungi is called?
a) Folivore b) Detrivore
c) Consumer d) Decomposer
37) Cholesterol is synthesized in?
a) Spleen b) Liver
c) Pancreas d) Brunner’s gland
38) The normal brown-red colour of faeces is due to the presence of?
a) Urobilinogen b) Stercobilin
c) Bilirubin d) Biliverdin
39) Bilirubin and biliverdin are found in?
a) Blood b) Bile
c) Pancreatic juice d) Saliva
40) Curdling of milk in stomach occurs by the action of?
a) Trypsin b) Erepsin
c) Rennin d) Chymotrypsin
41) Characteristic of mammalian liver is?
a) Kupffer’s cells and leucocytes
b) Leucocytes and canaliculae
c) Glisson’s capsules and Kupffer cells
d) Glisson’s capsules and leucocytes
42) The pH of succus entericus is?
a) 7.6 b) 6.6
c) 5.6 d) 2.0
43) Liver of rabbit is made up of?
a) 4 lobes b) 6 lobes
c) 5 lobes d) 7 lobes
44) Which of the following is the symptom of Ulcerative colitis?
a) Watery stools containing blood and mucus
b) Difficulty in swallowing
c) Loss of appetite
d) Eyes turn yellow
45) Which one of the following is not the reason for very high load of bilirubin in a newborn?
a) Excessive red blood corpuscles in the newborn burst, releasing the bilirubin
b) The liver of the newborn is too young to cope up with the heavy load of bilirubin
c) Mother’s milk contain a high amount of bilirubin
d) Insoluble bilirubin in the intestine is reabsorbed by the blood
46) The trypsin enzyme is secreted by?
a) Stomach b) Duodenum
c) Pancreas d) Liver
Digestion And Absorption MCQ Important Questions For NEET and CBSE – Answer Keys
1) C. The pyloric sphincter is a band of smooth muscle at the junction between the pylorus of the stomach and the duodenum of the small intestine. It plays an important role in digestion, where it acts as a valve to controls the flow of partially digested food from the stomach to the small intestine.
2) B. Although the gastrointestinal (GI) tract possesses intrinsic neural plexuses that allow a significant degree of autonomy over GI functions, the central nervous system (CNS) provides extrinsic neural inputs that regulate, modulate, and control these functions. While the intestines are
capable of functioning in the absence of extrinsic inputs, the stomach and esophagus are much more dependent upon extrinsic neural inputs, particularly from parasympathetic and sympathetic
pathways. The sympathetic nervous system exerts a predominantly inhibitory effect upon GI muscle and provides a tonic inhibitory influence over mucosal secretion while, at the same time, regulates GI blood flow via neurally mediated vasoconstriction. The parasympathetic nervous system, in contrast, exerts majorly excitatory control over gastric and intestinal tone and motility.
3) C. Rugae is a term used in anatomy that refers to a series of ridges produced by folding of the wall of an organ.Most commonly the term is applied to the internal surface of the stomach (gastric
4) B. When digestion is complete, the digested food must be moved from the digestive system into the blood system for movement around the body. This process is called ABSORPTION and it occurs
in the small intestine. As you have already learnt, the small intestine is specially adapted for this function. Molecules can pass from the cavity (lumen) of the small intestine through the epithelium of
the villi into the blood capillary network or the lacteals. Small molecules such as amino acids and monosaccharides enter the blood capillary network and are carried away by the blood. Larger molecules from fat (lipid) digestion enter the lacteal. The lacteal empties its contents into the lymph
system, which eventually empties its contents into the blood system. The uptake of nutrients into cells and tissues and consequent building up into more complex substances (as opposed to breaking down for the release of energy, which is respiration) is called ASSIMILATION.
5) B. Fat contains more carbon; have high calorific value
6) B. Villi are specialised for absorption in the small intestine as they have a thin wall, one cell thick, which enables a shorter diffusion path. They have a large surface area so there will be more efficient absorption of fatty acids and glycerol into the blood stream.
7) A. The lower Jaw of man is formed by the fusion of dentary bone only.
8) B. Crown of the teeth is covered by the hardest substance of the body called enamel.
9) C. Foliate papillae are present on tongue of rabbit. It is absent in humans.
10) D. Mucosa is the innermost layer which surrounds the lumen of alimentary canal
11) A. I2/2, C1/1, PM0/0, M2/2
12) D. Primary component of bones and also present in muscles and blood.
13) C. Cd – Itai-itai disease caused by cadmium poisoning
14) B. Goitre is due to iodine deficiency
15) A. Thiamine (B1) deficiency is common in alcoholics. It leads to decreased mental function, double vision and reduced muscular contraction and the resulting disorder is known as Wernicke’s
16) A. Steen Hoeck described that vitamin D is synthesised in presence of UV rays of sunlight in the skin.
17) B. The vitamins are generally divided into Two major groups : fat soluble (A, D, E and K) and water soluble (B – complex and C)
18) D. Biotin or nicotinic acid consists of sulphur. It acts as coenzyme needed for protein and fatty acid synthesis, CO2
fixation and transamination.
19) B. On the basis of their requirement in body the inorganic elements are of two types:
(i) Macroelements: C, H, N2
and O2 are called big four elements of living body because they are required in maximum amount in the body.
(ii) Microelemnts: Iron, iodine, manganese, copper, zinc, fluorine etc, are required in minimum amount in the body.
20) C. Vitamin A, D, E and K
21) A. Vitamin C is also called Ascorbic acid.
22) C. Funk proposed term vitamin
23) A. Secretin hormone produced by duodenal mucosa which causes a copious secretion of pancreatic juice
24) C. The duodenal epithelium is stimulated to secrete secretin by the entry of acidic chyme into the duodenum.
25) C. Lipid digested by lipase
26) A. Rennin is secreted by the cells of stomach in inactive form as prorennin and then activated to Rennin by HCl.
27) A. Duodenum and stomach
28) D. Scleroprotein – There are many scleroprotein superfamilies including keratin, collagen, elastin, and fibroin. The roles of such proteins include protection and support, forming connective tissue, tendons, bone matrices, and muscle fiber.
29) A. Ptyalin is Salivary amylase
30) A. Voluntary muscles
31) D. Gallbladder
32) C. Pulp cavity
33) C. Molars
34) B. Casein
35) D. Excess of amino acids cannot be stored in our body; they are deaminated and used to produce energy
36) B. Detrivore
37) B. Liver
38) B. Stercobilin is the pigment that imparts the characteristic brown-red colour to stool. Bilirubin is reduced to urobilinogen by bacterial flora. Urobilinogen is further reduced to stercobilinogen. Oxidation of sterocobilinogen in air yields stercobilin.
39) B. Bilirubin and biliverdin are known as bile pigments and they contribute to the colour of bile ranging from yellowish green to brown.
40) C. Rennin
41) C. Glisson’s capsules and Kupffer cells
42) A. Intestinal juice is a clear yellow fluid with slightly alkaline nature pH of 7.6, contains water, mucus and enzymes.
43) C. JIPMER 2017 – Liver of rabbit is partly divided into 5 lobes; three lobes on left side are a small spigelian, left lateral and left central while two lobes on the right side are caudate and right central or cystic.
44) A. Watery stools containing blood and mucus (Ulcerative colitis is an inflammatory bowel disease that causes long-lasting inflammation and ulcers in digestive tract. Ulcerative colitis affects the
innermost lining of large intestine and rectum. Symptoms usually develop over time, rather than suddenly.)
45) C. Mother’s milk contain a high amount of bilirubin is wrong statement ; Rest all absolutely correct.
46) C. The trypsin enzyme is present in pancreatic juice which is secreted by pancreas.