CBSE Class 12 Biology Question Paper 2007 (1)

CBSE Class 12 Biology Question Paper 2007 (1). Students can download the last year question papers using the link below. Free download of examination question papers with solutions.Last 10 year question papers should be practised to get better marks in examinations. 

SECTION-A

1. What is the importance of the epiglottis in human body ?

2. What happens to the glycogen concentration in the liver cells when thelevel of adrenaline increases in the blood stream of humans ?

3. Mention the scientific term used for modified form of reproduction in which seeds are formed without fusion of gametes.

4. What does ecological niche of an organism represent ?

5. It was diagnosed by a specialist that the immune system of the body of a patient has been suppressed. Name the disease the patient has been suffering from and its causative agent.

SECTION-B

6. Where are casparian strips located in a plant body and what are they made up of ? Mention its function. 

OR

What is respiration quotient (RQ) ? Under what conditions will the value of RQ be 1 ? Explain.

7. What is resting membrane potential of a neuron ?What is the role of sodium potassium pumps in maintaining it ?

8. Draw a diagram of external view of a human brain. Label the frontal lobe, temporal lobe, occipital lobe and cerebellum.

9. How is the milk production regulated by hormones in human female ? Explain.

10. Explain the significance of the auxin / cytokinin ratio in plant tissue culture.

11. What does S-shaped pattern of population growth represent ? How is J-shaped pattern different from it and why ?

12. What does secondary productivity in an ecosystem indicate ? List any two factors by which productivity is limited in aquatic ecosystems.

 Please click the link below to download pdf file of CBSE Class 12 Biology Question Paper 2007 (1).