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      :       Facilitated diffusion is more rapid than simple diffusion.

Reason         :       Facilitated diffusion involves expenditure of energy unlike simple diffusion.

Assertion      :       Carbohydrates are more suitable for the production of energy in the body than proteins and fats.

Reason         :       Carbohydrates can be stored in the tissues as glycogen for use in the production of energy, whenever necessary.

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.

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.