Text Book Back Questions and Answers - Chapter 5 Digestion and Absorption 11th Biology Zoology Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

Updated By SaraNextGen

On April 24, 2024, 11:35 AM

Digestion and Absorption
Text Book Back Questions and Answers
I. Multiple Choice Questions
Question 1.
Choose the incorrect sentence from the following:
(a) Bile juice emulsifies the fat.
(b) Chyme is a digestive acidic food in stomach.
(c) Pancreatic juice converts lipid into fatty acid and glycerol.
(d) Enterokinase stimulates the secretion of pancreatic juice.
Answer:
(d) Enterokinase stimulates the secretion of pancreatic juice.
Question 2.
What is chyme?
(a) The process of conversion of fat into small droplets.
(b) The process of conversion of micelles substances of glycerol into fatty droplet.
(c) The process of preparation of incompletely digested acidic food through gastric juice.
(d) The process of preparation of completely digested liquid food in midgut. Answer:
(c) The process of preparation of incompletely digested acidic food through gastric juice.
Question 3.
Which of the following hormones stimulate the production of pancreatic juice and bicarbonate?
(a) Angiotensin and epinephrine
(b) Gastrin and insulin
(c) Cholecysokinin and secretin
(d) Insulin and glucagon
Answer:
(c) Cholecysokinin and secretin.

Question 4.
The sphincter of Oddi guards
(a) Hepatopancreatic duct
(b) Common bile duct
(c) Pancreatic duct
(d) Cystic duct
Answer:
(a) Hepatopancreatic duct
Question 5.
In small intestine, active absorption occurs in case of
(a) Glucose
(b) Amino acids
(c) $\mathrm{Na}$
(d) All the above
Answer:
(d) All the above
Question 6.
Which one is incorrectly matched?
(a) Pepsin - stomach
(b) Renin - liver
(c) Trypsin - intestine
(d) Ptyalin - mouth
Answer:
(b) Renin - liver
Question 7.
Absorption of glycerol, fatty acids and monoglycerides takes place by
(a) Lymph vessels within villi
(b) Walls of stomach
(c) Colon
(d) Capillaries within villi
Answer:
(a) Lymph vessels within villi

Question 8.
First step in digestion of fat is
(a) Emulsification
(b) Enzyme action
(c) Absorption by lacteals
(d) Storage in adipose tissue
Answer:
(a) Emulsification
Question 9.
Enterokinase takes part in the conversion of
(a) Pepsinogen into pepsin
(b) Trypsinogen into trypsin
(c) Protein into polypetide
(d) Caseinogen into casein
Answer:
(b) Trypsinogen into trypsin
Question 10.
Which of the following combinations are not matched?

Answer:
(a) Bilirubin and biliverdin - (i) intestinal juice
Question 11.
Match column I with column II and choose the correct option

(a) (P - iv) $(Q-i i i)(R-i)(S-i i)$
(b) $(P-i i i)(Q-i i)(R-i)(S-i v)$
(c) $(P-i v)(Q-i i i)(R-i)(S-i i)$
(d) $(P-i i)(Q-i v)(R-i i i)(S-i)$
Answer:
(a) (P-iv ) ( Q - iii ) ( R-i) ( S-ii)
Question 12.
Match column I with column II and choose the correct option

(a) $(P-i v)(Q-i i)(R-i)(S-i i i)$
(b) $(P-i i)(Q-i v)(R-i)(S-i i i)$
(c) $(P-i)(Q-i i i)(R-i i)(S-i v)$
(d) $(P-i i i)(Q-i)(R-i i)(S-i v)$
Answer:
(b) $(P-i i)(Q-i v)(R-i)(S-i i)$
Question 13.
Match column I with column II and choose the correct option Column - I Column - II

(a) $(P-i v)(Q-i i)(R-i)(S-i i i)$
(b) $(P-i i i)(Q-i v)(R-i i)(S-i)$
(c) $(P-i v)(Q-i i i)(R-i i)(S-i)$
(d) $(P-i i i)(Q-i i)(R-i v)(S-i)$
Answer:
(c) $(P-i v)(Q-i i i)(R-i i)(S-i)$
Question 14.
Which of the following is not the function of liver?
(a) Production of insulin
(b) Detoxification
(c) Storage of glycogen
(d) Production of bile
Answer:
(a) Production of insulin
Question 15.
Assertion : (A) Large intestine also shows the presence of villi like small intestine.
Reason : (B) Absorption of water takes place in large intestine.
(a) Both $A$ and $B$ are true and $B$ is the correct explanation of $A$
(b) Both $A$ and $B$ are true but $B$ is not the correct explanation of $A$
(c) $A$ is true but $B$ is false
(d) $A$ is false but $B$ is true
Answer:
(d) $A$ is false but $B$ is true
Question 16.
Which of the following is not true regarding intestinal villi?
(a) They possess microvilli.
(b) They increase the surface area.
(c) They are supplied with capillaries and the lacteal vessels.
(d) They only participate in digestion of fats.
Answer:
(d) They only participate $;$ n digestion of fats.

II. Short Answer Questions
Question 17.
Why are villi present in the intestine and not in the stomach?
Answer:
In small intestine digestion gets completed and the absorption of digested food materials like glucose, amino acids, fatty acids and glycerol takes place. The food materials are to be retained in the intestine by increasing the surface area. Hence villi are present in the intestine. Stomach is the temporary storing organ of food. In the stomach, $\mathrm{HCl}$, pepsin, renin and lipase are secreted. These are concerned with digestion. Hence villi are not present in the stomach.
Question 18.
Bile juice contains no digestive enzymes, yet It is important for digestion. Why?
Answer:
Liver does not secrete digestive enzymes. It contains bile pigments hilirubin and hiliverdin which are the break down products of haemoglobin of dead RBCs. bile salts, cholesterol and phospholipids. Bile helps in emulsification of fats. Bile salts reduce the surface tension of fat droplets and break them into small globules. Bile also activates lipase to digest lipids.
Question 19.
List the chemical changes that starch molecule undergoes from the time it reaches the small intestine.
Answer:
In the small intestine, starch digestion gets completed. The pancreatic juice contains pancreatic amylases which acts on polysaccharide and convert into disaccharides (maltose). These cretions of the Brunner's gland along with the secretions of the intestinal glands constitute the intestinal juice or succus entericus. It contains maltose, lactose and sucrose. These convert maltose, lactose and sucrose into monosaccharides, glucose and fructose.

In the small intestine, complex carbohydrates are converted into simple ghicose. fructose and galactose. These are absorbed by active transport.
Question 20.
How do proteins differ from fats in their energy value and their role in the body?
Answer:
The calorific value and physiological fiel value of one gram of protein are 5.65 $\mathrm{Kcal}$ and $4 \mathrm{Kcal}$ respectively. Fat has a calorific value of $9.45 \mathrm{Kcal}$ and the physiological fuel value of $9 \mathrm{Kcal}$ per gram. Proteins are the source of amino acids required for growth and repair of body cells. They are stored in the body only to a certain extent. They replace the worn out protoplasm. They are important for the production of many enzymes. hormones and plasma. The catabolism of amino acids releases toxic nitrogenous wastes which are removed by the kidneys.
Question 21.
Digestive secretions are secreted only when needed. Discuss.
Answer:
Digestive glands are exocrine glands which secrete biological catalysts called enzymes. These enzyme convert the complex. insoluble foodmaterials like carbohydrates, proteins and lipids into simplex, soluble food materials like glucose and fructose, amino acids and fatty acids and glycerol. These digestive ccretions act only when food materials are available in the alimental)' canal.
Question 22.
Label the given diagram.
Answer:
A - Right and left hepatic duct of liver.

$B$ - Common bile duct.
C - Pancreatic duct (duct of Wirsung)
D - Sphincter of oddi
E - Gall bladder.

In-Text Questions Solved
Question 1.
Though the bile juice of liver has no digestive enzyme but is very essential for proper digestion of food, especially of the fats. Discuss the following?
(a) What is composition of bile?
(b) How it helps in digestion of fats and other nutrients of food?
(c) How it helps in absorption of fats?
Answer:
The bile contains bile pigments (bilirubin and biliverdin) as the break down products of hemoglobin of dead RBCs, bile salts, cholesterol and
phospholipids but has no enzymes. Bile helps in emulsification of fats. Bile salts reduce the surface tension of fat droplets and break them into small globules. Bile also activates lipases to digest lipids.
Question 2.
What would happen if $\mathrm{HCl}$ is not secreted in the stomach?
Answer:
The gastric juice contains $\mathrm{HCl}$ and proenzymes. The proenzyme pepsinogen, on exposure to $\mathrm{HCl}$ gets converted into the active enzyme pepsin which converts proteins into proteoses and peptones (peptides). The $\mathrm{HCl}$ provides an acidic medium ( $\mathrm{pH}-1.8)$ which is optimum for pepsin, kills bacteria and other harmful organisms and avoids putrifaction. So, if $\mathrm{HCl}$ is not secreted in stomatch, digestion of protein and destruction of harmful micro organisms will be affected.
Question 3.
What features of the small intestine enables it to absorb digested food efficiently?
Answer:
Absorption is a process by which the end product of digestion passes through the intestinal mucosa into the blood and lymph. The villi in the lumen of ileum are the absorbing units, consisting of a lacteal duct in the middle surrounded by fine network of blood capillaries. The process of absorption involves active, passive and facilitated transport.
Question 4.
What happens to the protein molecules in food, from the time it is swallowed, to the time its products are built up in the cytoplasm of a muscle cell?
Answer:
Proteins and partially digested proteins in the chyme on reaching the intestine are acted upon by the proteolytic enzymes of pancreatic juice. Trypsin hydrolyses proteins into polypeptides and peptones, while chymotrypsin hydrolyses peptide bonds associated with specific amino acids. Proteins are source of amino acids required for growth and repair of body cells. They are stored in the body only to a certain extent; large quantities are excreted as nitrogenous waste.
Textbook Activities Solved
Test for Starch :
Add a few drops of iodine to the given warm food sample. If any starch is present in the given food sample it will change the colour of the iodine from brown to blue black.
2. Test for protein :

Mix the given food sample with $3 \mathrm{~mL}$ of water in a test tube. Shake the mixture, and then add a few drops of Biuret solution. If protein is present, the colour of the solution will change to purple.
3. Test for glucose :
Mix the given food sample with $3 \mathrm{~mL}$ of water in a test tubes. Shake the mixture, and then add a few drops of Benedict's solution. Keep the test tube in a water bath and heat carefully. If glucose is present, the colour of the solution will change from blue to green to brick red depending upon the amount of glucose.
Entrance Examination Questions Solved Choose the correct Answer
Question 1.
How pepsin is differing from trypsin?
(a) It digests protein in acidic medium
(b) It digests protein in alkaline medium
(c) It digests carbohydrate in acidic medium
(d) It digests carbohydrate in alkaline medium
Answer:
(a) It digests protein in acidic medium
Question 2.
Human intestine is large because
(a) Bacteria in the food moves slowly
(b) Substances of food digest slowly
(c) It provide more space for the absorption of digested food
(d) It provide more space for the storage of food

Answer:
(c) It provide more space for the absorption of digested food
Question 3.
How the epidermal cells in the stomach of vertebrate animal is protected against HCl?
(a) $\mathrm{HCl}$ is dilute
(b) Epidermal cells defense the function of $\mathrm{HCl}$
(c) $\mathrm{HCl}$ is neutralized in stomach
(d) Epidermal cells covered with secretion of mucus
Answer:
(d) Epidermal cells covered with secretion of mucus
Question 4.
By what the major part of mammalian teeth is made up ?
(a) Root
(b) Pulp
(c) Dentin
(d) Enamel
Answer:
(c) Dentin
Question 5.
Enterokinase takes part in the conversion of what?
(a) Pepsinogen into pepsin
(b) Trypsinogen into trypsin
(c) Protein into polypetide
(d) Casernogen into casein
Answer:
(b) Trypsinogen into trypsin .
Question 6.
Secretin stimulates production of
(a) Saliva
(b) Gastric juice
(c) Bile

(d) Pancreatic juice
Answer:
(d) Pancreatic juice
Question 7.
Pepsin acts in
(a) Basic medium
(b) Acidic medium
(c) Neutral medium
(d) All type of medium
Answer:
(b) Acidic medium
Question 8.
Enzyme trypsin is secreted by
(a) Duodenum
(b) Liver
(c) Pancreas
(d) Stomach
Answer:
(c) Pancreas
Question 9.
The number of teeth that grow twice in the human life is 
(a) 4
(b) 12
(c) 20
(d) 28
Answer:
(c) 20
Question 10.
The number of teeth that grow once in the human life is
(a) 4

(b) 12
(c) 20
(d) 28
Answer:
(d) 28
Question 11.
Cholesterol is synthesised in 
(a) Bninner's glands
(b) Liver
(c) Spleen
(d) Pancreas
Answer:
(b) Liver
Question 12.
Largest gland in human body is $[\mathrm{JK}, \mathrm{CN}$
(a) Liver
(b) Pancreas
(c) Pituitary
(d) Thyroid
Answer:
(a) Liver
Question 13.
Muscular contraction of alimentary canal are .
(a) Circulation
(b) Deglutition
(c) Churning
(d) Peristalsis
Answer:
(d) Peristalsis
Question 14.
Fatty acids and glycerol are first absorbed by
(a) Lymph vessels

(b) Villi
(c) Blood capillaries
(d) Hepatic portal vein
Answer:
(a) Lymph vessels
Question 15.
Trypsin changes
(a) Proteins into peptones
(b) Fats into fatty acids
(c) Starch and glycogen into maltose
(d) Maltose into its components
Answer:
(a) Proteins into peptones
Question 16.
Secretin hormone is produced by
(a) Stomach
(b) Liver
(c) Intestine
(d) Pancreas
Answer:
(c) Intestine
Question 17.
Narrow distal part of stomach is
(a) Cardiac
(b) Pharynx
(c) Duodenum
(d) Pylorus
Answer:
(d) Pylorus
Question 18.
$\mathrm{pH}$ suitable for ptyalin actions is
(a) $6-8$

(b) $7-8$
(c) $3-2$
(d) $9-3$
Answer:
(c) $3-2$
Question 19.
What will happen if bile duct gets choked?
(a) Feces become dry
(b) Acidic chyme will not be neutralised
(c) There will be little digestion in intestine
(d) Little absorption of fat will occur
Answer:
(b) Acidic chyme will not be neutralised
Question 20.
Digestion of both starch and protein is carried out by
(a) Gastric juice
(b) Gastric lipase
(c) Pancreatic juice
(d) Ptyalin
Answer:
(c) Pancreatic juice
Question 21.
What is common among amylase, renin and trypsin?
(a) All proteins
(b) Proteolytic enzymes
(c) Produced in stomach
(d) Act at pH lower than 7
Answer:
(a) All proteins
Question 22.
Enterokinase is
(a) Pancreatic hormone

(b) Intestine hormone
(c) Pancreatic enzyme
(d) Component of Intestinal juice
Answer:
(d) Component of Intestinal juice
Question 23.
Which enzyme initiates protein digestion?
(a) Pepsin
(b) Trypsin
(c) Aminopeptidase
(d) Carboxypeptidase
Answer:
(a) Pepsin
Question 24.
Enzyme which does not directly act upon food substrate is
(a) Trypsin
(b) Lipase
(c) Enterokinase
(d) Arnylopsin
Answer:
(c) Enterokinase
Question 25.
Pepsin is secreted by
(a) Peptic cells
(b) Zymogen cells of stomach
(c) Zymogen cells of duodenum
(d) Pancreas
Answer:
(a) Peptic cells
Question 26.
Pepsinogen is activated by
(a) Chymotrypsin

(b) Trypsin
(c) $\mathrm{HCl}$
(d) Pepsin
Answer:
(c) $\mathrm{HCl}$
Question 27.
Contraction of gall bladder is induced by
(a) Gastrin
(b) Cholecystokinin
(c) Secretin
(d) Enterogastrone
Answer:
(b) Cholecystokinin
Question 28.
Hormone that stimulates stomach to secrete gastric juice is
(a) Run
(b) Enterokinase
(c) Enterogastron
(d) Gastrin
Answer:
(d) Gastrin
Question 29.
Water is largely absorbed in
(a) Stomach
(b) Oesophagus
(c) Small intestine
(d) Colon
Answer:
(d) Colon
Question 30.
$\mathrm{HCl}$ is secreted by
(a) Zymogen cells

(b) Kupifer's cells
(c) Oxyntic cells
(d) Mucous cells
Answer:
(c) Oxyntic cells
Question 31.
Jaundice is a disease of
(a) Kidney
(b) Liver
(c) Pancreas
(d) Duodenum
Answer:
(b) Liver
Question 32.
Which is different?
(a) Gastrin
(b) Secretin
(c) Ptyalin
(d) Glucagon
Answer:
(C) Ptyalin
Question 33.
Gastrin is
(a) Hormone
(b) Enzyme
(c) Nutrient
(d) Digestive secretion
Answer:
(a) Hormone
Question 34.
Saliva contains enzyme
(a) Enterokinase

(b) Ptyalin/ Amylase
(c) Chymotrypsin
(d) Lipase
Answer:
(b) Ptyalin) Amylase
Question 35.
In human being cellulose is digested by
(a) Enzyme
(b) Symbiotic bacteria
(c) Symbiotic protozoAnswer:
(d) None of the above
Answer:
(b) Symbiotic bacteria
Question 36.
Enzyme lactase occurs in 
(a) Saliva
(b) Pancreatic juice
(c) Intestinal juice
(d) Stomach
Answer:
(c) Intestinal juice
Question 37.
Protein I enzyme is absent in 
(a) Saliva
(b) bile
(c) Pancreatic juice
(d) Intestinal juice
Answer:
(b) Bile
Question 38.
Dental formula shows
(a) Structure of teeth

(b) Monophyodont or diphyodont condition
(c) Number and type of teeth in both jaws
(d) Number and type of teeth in one half of both jaws
Answer:
(c) Number and type of teeth $\mathrm{in}$ both jaws
Question 39.
$\mathrm{pH}$ of gastric juice / stomach is
(a) $1.5-3.0$
(b) $5.0-6.8$
(c) $7.0-9.0$
(d) $6.0-8.0$
Answer:
(a) $1.5-3.0$
Question 40.
In case of taking food rich in lime juice, the action of ptyalin on starch is
(a) Enhanced
(b) Reduced
(c) Unaffected
(d) Stopped
Answer:
(b) Reduced
Question 41.
Bile salts take part in
(a) Digestion of carbohydrates
(b) Brokedowri of proteins
(c) Emulsification of fat
(d) Absorption of glycerol
Answer:
(c) Emulsification of fat
Question 42.
Digestive juice contains catalytic agents called

(a) Vitamins
(b) Hormones
(c) Enzymes
(d) Nitrates
Answer:
(c) Enzymes
Question 43.
Which is not the function of liver?
(a) Production of insulin
(b) Detoxification
(c) Storage of glycogen
(d) Production of bile
Answer:
(a) Production of insulin
Question 44.
Fat absorbed from gut is trAnswer:ported in blood
(a) Micelles
(b) Liposomes
(c) Chemomicrons
(d) Chlymicrons
Answer:
(a) Micelles
Question 45.
In small intestine, active absorption occurs in case of
(a) Glucose
(b) Amino acids
(c) $\mathrm{Na}+$
(d) All the above
Answer:
(d) All the above
Question 46.
Which one is not matched?

(a) Pepsin - stomach
(b) Renin - liver
(e) Trypsin - intestine
(d) Ptyalin - mouth
Answer:
(b) Renin - liver
Question 47.
What is cholecystokinin?
(a) Bile pigment
(b) Gastro-intestinal hormone
(c) Enzyme
(d) Lipid
Answer:
(b) Gastro-intestinal hormone
Question 48.
Secretion of gastric juice is controlled by
(a) Enterogesterone
(b) Cholecystokinin
(c) Gastrin
(d) Pepsin
Answer:
(c) Gastrin
Question 49.
Which one is wisdom teeth?
(a) Third molar, four in number
(b) Third molar, two in number
(c) Second molar, four in number
(d) Second molar, two in number
Answer:
(a) Third molar, four in number
Question 50.
in humans, digestion is

(a) Intercellular
(b) Intracellular
(c) Extracellular
(d) Both A and B
Answer:
(b) intracellular
Question 51.
Gall bladder takes part in
(a) Secretion of bile
(b) Storage of bile
(c) Formation of bile salts
(d) Formation of enzymes
Answer:
(b) Intracellular .
Question 51.
Gall bladder takes part in
(a) Secretion of bile
(b) Storage of bile
(c) Formation of bile salts
(d) Formation of enzymes
Answer:
(b) Storage of bile
Question 52.
Renin acts on milk protein and changes
(a) Caesinogen into caesin
(b) Caesin into paracaesin
(c) Caesinogen into paracaesin
(d) Paracaesin into Caesinogen
Answer:
(a) Caesinogen into caesin
Question 53.
Glucose is stored in liver as

(a) Starch
(b) Glycogen
(c) Cellulose
(d) Sucrose
Answer:
(b) Glycogen
Question 54.
Absorption of glycerol, fatty acids and monoglycerides takes place by
(a) Lymph vessels within villi
(b) Walls of stomach
(c) Colon
(d) Capillaries within villi
Answer:
(a) Lymph vessels within villi
Question 55.
Which ones are bile salts?
(a) Haemoglobin and biliverdin
(b) Bilirubin and biliverdin
(c) Bilirubin and Haemoglobin
(d) Sodium glycolate and taurocholate
Answer:
(d) Sodium glycolate and taurocholate
Question 56.
Ptyalin is inactivated by a component of gastric juice called
(a) Pepsin
(b) $\mathrm{HCl}$
(c) Renin
(d) Mucus
Answer:
(b) $\mathrm{HCl}$

Question 57.
Epithelial cells involved in absorption of digested food have on their free surface
(a) Zymogen granules
(b) Pinocytic vesicles
(c) Phagocytic vesicles
(d) Microvilli
Answer:
(d) Microvilhi
Question 58.
First step in digestion of fat is
(a) Emulsification
(b) Enzyme action
(c) Absorption by lacteals
(d) Storage in adipose tissue
Answer:
(a) Emulsification
Question 59.
DNA-ase and RNA-ase are enzymes produced by
(a) Salivary glands
(b) Pancreas
(c) Stomach
(d) Intestine
Answer:
(b) Pancreas
Question 60.
Carboxypeptidase is secreted by
(a) Pancreas
(b) Stomach
(c) Salivary glands
(d) Intestine
Answer:
(a) Pancreas

Question 61.
Secretin and Cholecystokinin are digestive hormone. They are secreted in
(a) Pyloric stomach
(b) Duodenum
(c) lleum
(d) Oesophagus
Answer:
(b) Duodenum
Question 62.
Crown of teeth is covered by
(a) Dentin
(b) Enamel
(c) (a) and (b) both
(d) None of these
Answer:

(b) Enamel
Question 63.
Both the crown and root of a teeth is covered by a layer of bony hard substance called 
(a) Enamel
(b) Dentin
(c) Bony socket
(d) Cementum
Answer:
(d) Cementum
Question 64.
Lysozymes are found in
(a) Saliva
(b) Tears
(c) (a) and (b) both
(d) Mitochondria
Answer:
(c) (a) and (b) both

Question 65.
Which of the following is not present in pancreatic juice?
(a) Trypsinogen
(b) Chymotrypsin
(c) Parasitic
(d) lipase
Answer:
(c) Parasitic
Question 66.
Which of the following statement is not correct?
(a) Brunner's glands are present in the submucosa of stomach and secrete pepsinogen
(b) Goblet cells are present in the mucosa of intestine and secrete mucus.
(c) Oxyntic cells are present in the mucosa of stomach and secrete $\mathrm{HCl}$.
(d) Acini are present in the pancreas and secrete carboxypeptidse.
Answer:
(a) Brunner's glands are present in the submucosa of stomach and secrete pepsinogen
Question 67.
Which hormones stimulate the production of pancreatic juice and bicarnates?
(a) Cholecystokinin and secretin
(b) Insulin and glucagon
(c) Angiotensin and epinephrine
(d) Gastnn and Insulin
Answer:
(a) Cholecystokinin and secretin
Question 68.
In the stomach, gastric acid is secreted by the
(a) gastrin secreting cells
(b) parietal cells
(c) peptic cells
(d) acidic cells

Answer:
(b) parietal cells
Question 69.
The enzymes that is not present is succus entericus is
(a) lipase
(b) maltase
(c) nucleases
(d) nucleosîdase
Answer:
(c) nucleases
Question 70.
Which of the following are not polymerase?
(a) Proteins
(b) Polysaccharides
(c) Lipids
(d) Nucleic acids
Answer:
(c) Lipids
Question 71.
A baby aged two years is admitted to play school and passes through a dental check-up. The dentist observed that the boy had twenty teeth. Which teeth were absent?
(a) Canines
(b) Pre-Molars
(c) Molars
(d) Incisors
Answer:
(b) Pre-Molars
Question 72.
Which cells of crypts of Leiberkuhn' secrete antibacterial lysozyme?

(a) Paneth cells
(b) Zymase cells
(c) Kupifer cells
(d) Argentaffin cells
Answer:
(a) Paneth cells
Question 73.
The hepatic portal veins drains blood to liver from
(a) Stomach
(b) Kidneys
(c) Intestine
(d) Heart
Answer:
(c) Intestine
Question 74.
Which of the following options best represent the enzyme composition of pancreatic juice?
(a) Amylase, pepsin, trypsinogen, maltase
(b) Peptidase, Amylase, pepsin, renin
(c) Lipase, amylase, trypsinogen, procarboxypeptidase
(d) Amylase, peptidase, trypsinogen, renin.
Answer:
(c) Lipase, amylase, trypsinogen, procarboxypeptidase
Question 75.
Good vision depends on adequate intake of carotene rich food. Select the best option from the following statements.
(a) Vitamin A derivatives are formed from carotene.
(b) The photo pigments are embedded in the membrane discs of the inner segments.
(c) Retinal is a derivative of vitamin $\mathrm{A}$
(d) Retinal is light absorbing part of all the visual photopigments.
OPTION
(a) a, c and d

(b) a and e.
(c) b, e and d
(d) $a$ and $b$
Answer:
(a) a, c and d