practicals paper 1

Question 1

aseptic techniques (4)

Answer 1

wipe down surfaces with antibacterial cleaner before and after experiment
use a bunsen burner in the workspace so that convection currents draw microbes away from the culture
flame the wire loop before use
flame the neck of any bottles

Question 2

why are bacteria incubated at 25 degrees

Answer 2

incubating at 37 degrees (human body temperature)
could enable pathogens to grow that are harmful to humans