List of top Questions asked in TN HSE+2 (Class XII)- 2026

What are recombinant vaccines? Explain their types.

Write notes on:  Soft Commodities market.

Difference between Active and Passive immunity.
Darwin’s finches and Australian marsupials are suitable examples of adaptive radiation – justify the statement.
“Alien species invasion is a threat to endemic species” – Substantiate this statement.
Explain the experimental proof of DNA replication by Meselson and Stahl.
Write a note on Protozoan diseases.
Write the causes for infertility in males and females.
Name the active chemical found in the medicinal plant Rauwolfia vomitoria. What type of diversity it belongs to?
Classify the antibiotics based on their action on bacteria.
What is gene "knock out"?
Mention the symptoms of Phenylketonuria and Down’s Syndrome.
Describe the structure of the human ovum with a neat labelled diagram.
What is SMOG and how is it harmful for us?
Give an account on population regulation.
Draw Gemmule in sponges and label the parts.
What are the three structural differences between RNA and DNA?
Why is it not possible to produce a vaccine against the "common cold"?
What are the gases that cause the Green House Effect?
Differentiate hibernation and aestivation.
What are the three strategies to be implemented in India to attain total reproductive health?
Why are sex linked recessive characters more common in the male human beings?
Differentiate - Leading strand and Lagging strand.
How does Neanderthal man differ from the Modern man in appearance?
What is Atavism?