Micro Week 4

Front 1

Cells

Back 1

-have cytoplasmic membrane which is selective permeable
-plant and bacteria cells have a cell for protection

Front 2

Viruses

Back 2

-have no cell wall
They are simple genetic material either RNA or DNA( never both like humans)

Front 3

Capsid

Back 3

-mostly composed of liquid
-Some more advanced viruses have an outer envelope in addition to the protein coat shich is necessary for infectivity
-their subunits are made of capsomeres

Front 4

Intracellular parasites

Back 4

Viruses are these which menas they can only live (replicate) inside living cells
-they do so at living cells own expense which leads to cell death

Front 5

True / False

Back 5

Viruses cannot be grown on artificial media like agar and broth
True

Front 6

Plaques

Back 6

When viruses kill cells in tissue cultures tiny holes are made in the monolayer
-These can be seen under a microscope
-one plaque starts from one virus

Front 7

Plaque formation

Back 7

CPE = cytopathic effect

Front 8

Lytic cycle

Back 8

The virus enters the cells, sheds its coat uses the cells machinery to copy its nucleic acid and its protein coat: many mature viruses emerge from the dying cell and spread to neighboring cells to do the same

Front 9

Lysogenic

Back 9

the virus enters the cell and does not replicate, instead its nucleic acid is incorporated into the nucleic acid of the cell. Then later can go lytic

Front 10

Prion

Back 10

The prion has no nucleic acis it is just protein
-it is another life form simpler than the virus

Front 11

CJD

Back 11

Creutzdeldt - Jakob disease