Unit 1.4 Proteins Flashcards
1
Q
What does the sequence of amino acids in a protein determine
A
- The shape
- The proteins function
2
Q
What are the different protein functions
A
- Structural
- Enzymes
- Hormones
- Antibodies
- Receptors
3
Q
What are enzymes four qualities
A
- Made in all living cells
- Speeds up chemical reactions
- Made of proteins
- Remains unchanged in chemical reactions
4
Q
What is an active site
A
- It is the part of an enzyme that binds to a specific substrate and a chemical reaction takes place
- The shape of the active site is complementary to an enzymes specific substrate
5
Q
What are products
A
- The molecule(s) made by an enzyme controlled reaction
6
Q
What are substrates
A
- A substance which enzymes act upon
7
Q
What is an example of a degradation reaction
A
Starch—-amylase—-> Maltose
8
Q
What is an example of a synthesis reaction
A
G-1-P——phosphorylase—-> Starch
9
Q
What are optimum conditions
A
- The pH and temperature where an enzyme is most active at
10
Q
How does temperature affect an enzyme’s rate of reaction
A
- As temperature increases the rate of reaction increases until it has reached it’s optimum conditions and then the rate of reaction will rapidly decrease
11
Q
How does pH affect an enzymes rate of reaction
A
- As pH increases the rate of reaction increases until it has reached it’s optimum conditions and then the rate of reaction will rapidly decrease
12
Q
What does denatured mean
A
- When the active site changes shape the substrate no longer fits this affects the rate of reaction
13
Q
What happens to an enzyme once it has reached it’s optimum conditions
A
- The enzyme become denatured
14
Q
Why do you have controls in an experiment
A
- They are set up to compare results of an experiment when no treatment is applied
15
Q
How do you measure enzyme activity in practicals
A
- Is usually measured by the appearance of a product or disappearance of a substrate
