Assertion      :       Presence of HCl in stomach is necessary for the process of digestion.

Reason         :       HCl kills and inhibits the growth of bacteria in the stomach.

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
3. If the assertion is true but the reason is false
4. If both the assertion and reason are false

Assertion      :       Chewing is one of the important process of digestion in animals.

Reason         :       It helps in enzyme action.

Assertion      :       Adult human being is not perfect in digestion of milk.

Reason         :       With age, man produces little or no lactase in the intestinal juice.

Assertion  :       Trypsin helps in blood digestion of predator aimals.

Reason     :     Trypsin hydrolyses fibrinogen.

Assertion      :       Volume and fluidity of intestinal contents have increased in a person.

Reason         :       The person drank sea water.

Assertion      :       Sea-faring fishermen suffer from paralysis.

Reason         :       They can be deficient of Vitamin B₁.

Assertion      :       Starch is hydrolysed by ptyalin to maltose.

Reason         :       Sucrose hydrolyses sucrose to lactose.

Assertion      :       Cold blooded animals have no fat layer.

Reason         :       Cold blooded animals use their fat for metabolic process during hibernation.

Assertion :       In alcoholic drink, the alcohol is converted into glucose in the liver.           

Reason    :       Liver cells are able to produce glucose from alcohol by back fermentation.

Assertion  :     The main part of carbohydrate digestion takes place in small intestine.

Reason    :      Here pancreatic amylase converts carbohydrates into lactose.