Enzymes Flashcards
What are Enzymes?
They are molecules (proteins) that speed up chemical reactions - Catalyst
Where do majority of them work?
Inside the cell, but some can operate outside of it.
The reactions that enzymes catalyse can be divided into three different groups - Which are they?
- Breaking large molecules into small ones
- Building up large molecules from small ones
- Converting one small molecules into another.
What are the 3 parts of an enzyme?
- Active site
- Substrate
- Enzyme
What is the model that enzymes work through called?
Lock and key
Enzymes have 5 important properties - name them.
- They are all proteins
- Each enzyme catalyses one reaction
- They can be used again and again
- They are influenced by temperature
- They are influenced by pH
How is the activity of enzymes determined? How can it be measured?
Its determined by the rate they catalyse.
It can be measured by how many product is formed or by how many substrate is used over time.
In an organism, the optimal temperature for an enzyme is not the same - True or false?
False. The temperature for an enzyme is the same.
In an organism, the optimal pH varies according to the function of the enzyme - True or false?
True
What is it called when enzymes loose their function, once the active site changes its shape, making it impossible for the substrate to connect?
Denaturation
When does denaturation happen?
When the temperature is too high of the pH is far from its optimal, the enzymes denature.
