B3(Organisation and the digestive System) Flashcards
1
Q
What are the five levels of organisation in living organisms?
A
Cells —>tissues—>organs—>organ system—>Organisms
2
Q
What are Enzymes?
A
A large protein that catalyse reactions.
3
Q
Are Enzymes changed in the reactions they catalyse?
A
No.
4
Q
Enzymes are sometimes changed in the reactions they catalyse, what is this?
A
They are denatured.
5
Q
What is the lock and key theory ?
A
A simple model of how enzymes work. The enzymes active site(which is a specific shape) will catalyse a specific reaction through its lock, because the substrates(the key) specific shape fits into its active site.
6
Q
What is the active site?
A
Where the reaction occurs.
7
Q
A
