CBSE Class 12 Biology Solved Question Paper 2016

Explain the significance of meiocytes in a diploid organism.

According to de-Vries what is saltation?

State a difference between gene and an allele.

Discuss the role the enzyme DNA ligase plays during DNA replication.

List the events that reduce the Biological Oxygen Demand (BOD) of a primary effluent during sewage treatment. 

Suggest the breeding method most suitable for animals that are below average in milk productivity.

Excessive nutrients in a fresh water body cause fish mortality. Give two reasons

Name the causative organism of the disease amoebiasis. List three symptoms of the disease.

Mention the kind of biodiversity of more than a thousand varieties of mangoes in India represent. How is it possible?

Sugggest a technique to a researcher who needs to separate fragments of DNA.