CBSE Last 10 year Question Papers

How can I get previous year class 12th Biology sample paper of Central Board of Secondary Education?

[Arvind Kumar]

You want class 12th Biology sample paper of Central Board of Secondary Education so here I am providing you the same:

A bacterial cell was transformed with a recombinant DNA that was generated using a human gene. However, the transformed cells did not produce the desired protein. Explain the reason.

Name an industry which can cause air pollution, thermal pollution and eutrophication.

Why is genetic variation important in the plant Rauwolfia vomitoria?

In 1953 S. L. Miller created primitive earth conditions in the laboratory and gave experimental evidence for origin of first form of life from pre-existing non-living organic molecules. What were the primitive earth conditions created by them.

During reproduction, the chromosome number (2n) reduces to half (n) in the gametes and again resume the original number (2n) in the offspring, what are the processes through which these events take place?

Complete sample paper is available in attached word file. you can free download it whenever you want.