How is a Bunsen burner used in aseptic techniques?
It is used to sterilise Petri dishes
It sterilises the wire loop
It sterilises the Agar gel
How do gene probes work?
They are strands of mRNA which are complementary to the pathogen's DNA
They are single-stranded DNA whose base sequence will pair up with part of the pathogen's DNA
They are tools which are used to sequence genomes
At which temperature would you incubate a colony of bacteria in a school or college?
25°C
37°C
18°C
How is Gram staining used as a diagnostic test?
It stains all bacteria
It stains pathogenic fungi
It stains some bacteria, which are called Gram positive
Which process can be used by scientists to increase the number of pathogen cells for diagnostic tests?
Growth medium
Cell culture
Re-infection
What is a gene probe?
A fluorescent dye
A special kind of antibody
A piece of single-stranded DNA
How does an autoclave kill microorganisms?
It uses high pressure and a high temperature
It uses a low pressure and a high temperature
It uses a high pressure and low temperature
How does a scientist make plates for a cell culturing diagnostic test?
Sterile growth medium is poured into a Petri dish to make an agar plate
Sterile agar is poured into a Petri dish
Growth medium is poured into an agar plate
A molecule of fluorescent dye may be attached to which other molecules for diagnostic tests? - Higher
Gene probes
Monoclonal antibodies
Gene probes and monoclonal antibodies
Why are the antibodies used in diagnostic tests called monoclonal antibodies? - Higher
They are made by clones of the white blood cell which made antibodies to a specific antigen
The antibodies are clones of an antibody which binds to the antigen
They are all taken from the same cloned animal