Biology questions..i'm struggleing, please help?

Hi, I'm really struggleing on these questions, i'd be grateful if anyone can help??





(a) Which of the following is not a method of heat sterilisation?





Autoclaving


Tyndallisation


Pasteurisation


All of these are methods of heat sterilisation.





(b) Which of the following is MOST effective against resistant endospores?





Autoclaving


Tyndallisation


Pasteurisation


All of these are very effective against resistant endospores.





(c) Sterilisation is accomplished by ______________________ all viable microorganisms.





Killing


Removing


Either killing or removing


Neither killing nor removing.





(d) Ultraviolet light sterilises by:





Forming thymine dimers in DNA


Denaturing proteins


Disrupting membranes.


All of these.


None of these





Thanku, xx

Biology questions..i'm struggleing, please help?
(a) all of them are


(b) i think its autoclaving but im not entirely sure


(c) killing


(d)thymine dimers