Homework Answers
1. Difference between predator-prey& Virus- host relationship
Predator-Prey interaction Virus-host interaction
(i) In predator-prey interaction the predator is an organism (I) In virus-host interaction, the virus is an organism who
that eats another organism,which is prey. is pathogen& host is the cell who get infected by virus.
.(ii) In this interaction predator direct hunts the prey. (II) In this interaction virus is a inter-cellular pathogen
that replicate within the host cell.
2. The cutting of DNA at specific locations is possible with so-called molecular scissors----restriction enzymes
They protect the prokaryotes from viral attacks by cleaving viral genome, when it enters into the cell.
Restriction enzymes cannot cleave it's own DNA, because of modification of restriction site (methylation) by methylase enzyme.
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