CBSE Class 7 Science Life Processes in Animals (Class 7 NCERT New) Quiz 2

1. What is the role of saliva in digestion?

A It neutralizes stomach acid B It moistens food and begins starch digestion C It breaks down fats D It digests proteins

2. The main purpose of respiration is to:

A Produce oxygen B Eliminate waste C Produce energy D Digest food

3. Assertion: Alveoli are found in the stomach. Reason: Alveoli help in gas exchange.

A A is false, but R is true B Both A and R are true, but R is not the correct explanation of A C A is true, but R is false D Both A and R are true and R is the correct explanation of A

4. Assertion: The small intestine is the main site for absorption of nutrients. Reason: The inner walls of the small intestine have finger-like projections.

A Both A and R are true and R is the correct explanation of A B Both A and R are true, but R is not the correct explanation of A C A is true, but R is false D A is false, but R is true

5. Assertion: The nose filters and moistens the air we breathe. Reason: Tiny hairs and mucus help trap dust particles.

A A is false, but R is true B Both A and R are true, but R is not the correct explanation of A C Both A and R are true and R is the correct explanation of A D A is true, but R is false

6. Assertion: Alveoli increase the surface area of the lungs. Reason: Greater surface area improves gas exchange.

A A is true, but R is false B A is false, but R is true C Both A and R are true and R is the correct explanation of A D Both A and R are true, but R is not the correct explanation of A

7. Assertion: The small intestine is longer than the large intestine. Reason: The small intestine is 1.5 m long.

A Both A and R are true and R is the correct explanation of A B Both A and R are true, but R is not the correct explanation of A C A is true, but R is false D A is false, but R is true

8. Assertion: Churning of food takes place in the stomach. Reason: The walls of the stomach contract and relax to churn the food.

A A is false, but R is true B Both A and R are true and R is the correct explanation of A C Both A and R are true, but R is not the correct explanation of A D A is true, but R is false

9. Assertion: The oesophagus is involved in gas exchange. Reason: The oesophagus connects the mouth to the stomach.

A Both A and R are true and R is the correct explanation of A B A is true, but R is false C A is false, but R is true D Both A and R are true, but R is not the correct explanation of A

10. Assertion: The pancreas is part of the respiratory system. Reason: The pancreas produces pancreatic juice that is basic in nature.

A Both A and R are true, but R is not the correct explanation of A B A is false, but R is true C Both A and R are true and R is the correct explanation of A D A is true, but R is false