drugs (topic 15)

Question 1

what are drugs

Answer 1

any substance taken into the body that modifies or affects chemical reactions
in the body

Question 2

antibiotics

Answer 2

A medical drug that kills bacteria by interfering with some of their important metabolic reactions.

Question 3

what are different ways in which an antibiotic can affect a bacteria

Answer 3

cause the bacterial cell membrane to break, killing the bacterial cell
prevent bacteria from making new cell walls, so the bacteria cannot reproduce or grow.

Question 4

do antibiotics affect viruses? why?

Answer 4

no they dont, because viruses dont have a cell wall or cell memebrane meaning antiboitcs cant affect them

Question 5

explain how antibiotic resistence happens

Answer 5

a bacteria mutates, becoming resistence to the antibiotic, the bacteria population which isnt resistant die, the mutated bacteria survives and when it reproduces by mitosis it transfers its resistant gene to its offsprings, producing a population of resistent bacteria.

Question 5

what is antibiotic resistence

Answer 5

when a bacteria is no longer affected by the antibiotic

Question 6

how can you limit the development of resistant bacteria, such as MRSA

Answer 6

use antibiotics only when needed, eg. not with viruses, take as prescribed follow whole course of treatment