Assertion : The amino acid glycine comes under the category of nonessential amino acids.
Reason : This is due to the fact that it can not be synthesised in the body.
Assertion : The mode of nutrition in higher animals is heterotrophic.
Reason : Animals can use different trophic levels for heterotrophic nutrition.
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.
Concept Questions :-
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.