6.2 Cause of death Flashcards
1
Q
what is the structure of a bacterial cell wall?
A
made up of peptisoglycan, a polysaccharide cross-linked by peptide chains
2
Q
which type of bacteria has thicker walls?
A
gram-positive
3
Q
what is a mesosome?
A
an infolding of the cell surface membrane
4
Q
describe the reproduction of a virus?
A
Virus attaches to host cell and inserts nucleic acid. The nucleic acid replicates and the viral protein coats are synthesised. New viral particles form and release due to cell lysis
5
Q
how is TB transmitted?
A
by droplet infection
TB can live on surfaces
6
Q
how is HIV transmitted?
A
only in bodily fluids e.g.
sharing needles, sex, blood to blood transfer and maternal transmission
