Question

1.how do vaccines works in our body?
2.different between antibiotic and vaccine?
3.what is pasteurisation? what is the use of it?
4. explain the process of metamorphosis in housefly ?
5.describe the sturucture of nucles?

Answer 1

vaccines are produced from the blood of a stronger organism by introducing germs of a particular disease in their bodies. they get a mild disease and build up immunity against them. then their blood is taken and allowed to get chilled which produces straw coloured SERUM and the fibrinogen gets separated. now this contains weakened or dead germs which is introduced in our body and this produces immunity.

antibiotic is produced from an organism which prevents the growth of another disease causing microorganism.
Vaccine is as i mentioned weakened or dead germs of a particular disease introduced in our body to produce immunity against the disease.

pasturization in the process of boiling milk at 60 degree celsius for 30 mins and then suddenly chilling it at a very low temperature to kill germs.
it is used to purify milk.

metamorphosis in a housefly.
egg becomes larvae. larvae becomes pupa from which maggot comes out as an adult housefly ready for reproduction.

nucleus is a rounded and the largest cell organelle. it has a semi permeable membrane called nuclear membrane and has holes in it called nuclear pores. inside there is dense liquid nucleoplasm which contain chromatin fibres that become thick and ribbon like during cell divisions to form chromosomes.


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