MCB2010 MICROBIOLOGY... Course Home Content Grades Communication Tools Unit 2 Qu

Question

MCB2010 MICROBIOLOGY... Course Home Content Grades Communication Tools Unit 2 Quiz Simone Miller Anennt 22 Question 1 point) a why do animal inuses have envelopes and phages rarely do? Phages acquire an outer sumounding that is a partofthe cell walofthe bacterium they were created in rather than an outer surrounding of plasma membrane. Animal viruses wilanten eMaize the envelope in order to fuse with the plasma of a new target cel gaining entry into the cytoplasm. Animal viruses buld the envelope inside of the target cell as they are being replicated g but before the breaks open and releases them into the extracellular environment remnant of this building process. a a Since bacteria dont have cea membranes the bacterial viruses phases don them up when they leave the target cells. et Question 7 pointl a and Prions Viruses, Viroids, rane ytosis or and proteins. ns assemble. or rupture

Explanation / Answer

We know about the Viruses, a small infectious agents which can cause more harm when they gets suitable environment or they gets their portion to live inside a cell. They are of various kinds, some are bacterial type, like Bacteriophages which have got coat proteins and some legs and spikes that they need for the bacterial cells to penetrate. Some are of infectious to animal cells.

Penetration is the first and foremost mechanism they have to perform while they are trying to cause a harm, we need to remember here that bacterial cells possess cell wall as well as cell membranes, so a bacteriophage has to inject its genetic material though that, it does not depend on their outer coating which is made by an bacterium. Sometimes even a bacteriophage do have envelope but it’s only rarely.

Significant differences we can draw in case of animal viruses, which are suitable to carry out a deadly mechanism to infect a cell which lacks cell wall and only having a cell membrane. Envelops are derived from the animal cells membranes include the viral cell particles, specifically this envelope helps them avoiding the host immune system. Even some animal viruses do not have envelope but sits with spikes, still often they are fused to the host cell and taken inside.

The answer choice B. Animal viruses will offer stabilize the envelope in order to fuse with the plasma membrane of a new target cell, gaining entry into the cytoplasm.

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