Free Energy and the Effect of Enzymes on Reactions Flashcards
1
Q
Cellular Respiration Formula
A
C6H12O6 + 6O2 –> 6CO2 + 6H2O + 36ATP
2
Q
What type of reaction is cellular respiration?
A
- An exergonic reaction since △ G is negative
3
Q
What do enzymes do/don’t do in reactions?
A
- They do not change the value of △ G
- They lower the activation energy thereby speeding up reversible reactions
4
Q
Note about activation energy
A
- In biological processes many reactions happen and each one can have a separate activation energy
5
Q
How do enzymes lower the activation energy (Ea) barrier?
A
- Orienting substrates correctly
- Straining substrate bonds
- Providing favourable microenvironments to make substrates react/interact
6
Q
Example of a favourable microenvironment
A
The active sit of an enzyme might have certain charges, or pH values which influence bonds
7
Q
Effect of temperature on enzymes
A
Each enzyme has an optimal temp in which it can function
8
Q
Effect of pH on enzymes
A
Each enzyme had an optimal pH in which it can function
9
Q
If conditions of enzymes are optimal…
A
It favours the most active shape for the enzyme molecule
