CBSE biology
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How do cytokine barriers provide innate immunity in humans?
Cytokine inhibits viral replication. They form an innate immune system by forming physical barriers.
Cytokine barriers: Virus-infected cells secretes proteins call interferons which protect non-infected cells from further viral infection.
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Write the dual purpose served by Deoxyribonucleoside triphosphates in the polymerisation.
Deoxyribonucleoside triphosphates (DTPs) purpose:
(i) DTPs serves as substrates i.e. nucleotides during replication.
(ii) DTPs supply energy for polymerisation reaction by breaking of high energy terminal phosphates bond.
Write the names of the following :
(a) A 15 mya primate that was ape-like
(b) A 2 mya primate that lives in East African grasslands
(a) 15 mya, primates called Dryopithecus was more ape-like.
(b) 2 mya, Australopithecines lived in East African grasslands.
Mention the chemical change that proinsulin undergoes, to be able to act as mature insulin.
The proinsulin is cleaved to remove extra stretch called the C-peptide to form mature insulin having only A-chain and B-chain joined by a disulphide bond.
Name two diseases whose spread can be controlled by the eradication of Aedes mosquitoes.
Dengue and Chikungunya are the two disease whose spread can be controlled by the eradication of Aedes mosquitoes.
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Mock Test Series
Mock Test Series