Write the dual purpose served by Deoxyribonucleoside triphosphates in polymerisation.

In a nucleus, the number of ribonucleoside triphosphate is 10 times the number of deoxyribonucleoside triphosphates but only deoxyribonucleotides are added during the DNA replication. Suggest a mechanism.

Write two differences between addition and condensation polymerisation.

During in Vitro synthesis of DNA, a researcher used 2' -3' - dideoxycytidine triphosphate as raw nucleotide in place of 2'-deoxy cytidine triphosphate other conditions remaining triphosphate other conditions remaining standard. Will further polymerisation of DNA continue upto the end or not? Explain.

Write the mechanism of free radical polymerisation of ethene.

Name two methods which serve the purpose of early diagnosis is of bacterial or viral infection.

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound. Write the chemical equation for its preparation. For what purpose is its used in hospitals?

Ommatidia serve the purpose of photoreception in

Write 'True' or 'Fasle': Lichens serve as pollution indicators.