Cau 3: Trinh bay cng cua vach vk. Neu nhung dac diem # nhau co ban giua vach vk Gram - va Gram

a.cng cua vach

Duy tri hinh dang vk ju de mang sinh chat k bi cang fong ra roi tan vo

+Quy dinh tinh chat nhuom Gram

+Vach vk Gram(-) chua dung noi doc to,quy dinh doc luc va kha nang gay benh cua cac vk gay benh= noi doc to

+Quyet dinh t/c khang nguyen than cua vk

+La noi mang cac diem tiep nhan dac hieu cho thuc khuan the. No co y nghia (.) viec fan loai vk cung nhu cac ngcuu co ban #

+la noi tac dong cua nhom khang sinh kha quan trong,la noi tac dong cua lyzozym

b. Dac diem # nhau:

-Gr +: gom nhieu lop peptidoglycan, vach day 45 nm

+Tphan hoa hoc: don gian, la su trung hop nhieu lop peptidglycan. Gom 2 tp huu co co ban la glucid (tinh dac hieu) va protid (tinh khang nguyen)

+Quyet dinh tinh k doc

-Gr -: gom 1 lop peptidoglycan, vach mong 15-20 nm

+Tp hoa hoc: fuc tap, gom 3 tp huu co: glucid (tinh dac hieu), protid (tinh khang nguyen), lipid (doc)

+Quyet dinh tinh doc do lipid