Biology: (Infection) Flashcards
1
Q
why is a virus non living ?
A
a virus is non living because it needs a host
2
Q
similarities of bacteria and viruses
A
one cell makes many copies of itself. The DNA of viruses and bacteria is copied. Asexual reproducction
3
Q
differences of bacteria and viruses
A
bacteria divide into two to reproduce, viruses do not. viruses only reproduce in a living cell bacteria reproduce on their own
4
Q
how does our stomach, nose and skin defend us
A
stomach- produces hydrochloric acid which kill pathogens
nose- there’s hair and mucus that traps particles that could contain pathogens
skin- acts as a barrier to pathogens
5
Q
what do phagocytes do ?
A
phagocytes detect pathogens and engulf them. when inside the cell, enzymes break down and destroy the pathogen
