Class – XII (Year 2009)

Subject – Biology - (Delhi)

General Instructions:

1. All Questions are compulsory.

2. Wherever necessary, the diagrams drawn should be neat and properly labelled.

Q.1 Why hnRNA is required to undergo splicing ?

Q.2 How does colostrum provide initial protection against diseases to new born infants ?

Q.3 Name the group of organisms and the substrate they act on to produce biogas.

(E-Book) CBSE Board Class 12th Papers PDF : Biology

Courtesy: cbse.nic.in