SSLC (English Medium) कक्षा १० - Tamil Nadu Board of Secondary Education Question Bank Solutions for Science

State the importance of biofertiliser.

Name three improved characteristics of wheat that helped India to achieve high productivity

Describe mutation breeding with an example.

Biofortification may help in removing hidden hunger. How?

With a neat labelled diagram explain the techniques involved in gene cloning.

Higher Order Thinking Skill (HOT)

Polyploids are characterised by gigantism. Justify your answer.

Higher Order Thinking Skill (HOT)

‘P’ is a gene required for the synthesis of vitamin A. It is integrated with genome of ‘Q’ to produce genetically modified plant ‘R’.

1. What is P, Q and R?
2. State the importance of ‘R’ in India.

Excessive consumption of alcohol leads to ______.

Where does alcohol effect immediately after drinking?

Cirrhosis is associated with brain disorder.

Cirrhosis is caused in liver due to excessive use of ______.

Suggest measures to overcome the problems of an alcoholic.

Value based question

Once a person starts taking drugs or alcohol it is difficult to get rid of the habit. Why?

Calculate the number of water molecules present in one drop of water which weighs 0.18 g.

The electronic configuration of metal A is 2, 8, 18, 1.

The metal A when exposed to air and moisture forms B a green layered compound. A with con. H2 SO4 forms C and D along with water. D is a gaseous compound. Find A, B, C, and D.

Name the simplest ketone and give its structural formula.

How does leech suck blood from the host?

How is the circulatory system designed in leech to compensate the heart structure?

Differentiate between Medullated and non-medullated nerve fibre.

All the nerves in the body are covered and protected by meninges.