Test 2 ENERGY Flashcards
(21 cards)
Energy
Ability to do work; necessary for all living things
Chemical potential energy
absorbed or released during a chemical reaction
Enzymes
- Catalyze rxns by building and breaking Down
- can be reused
- bind to substrates
- sensitive to PH & temp
2 types of rxns in energy
Exergonic (build) & endergonic (break)
How do enzymes work?
Binding with substrates to speed up reactions
What 2 things do chemical reactions have?
Reactants and products
Chemical reaction
Change in molecular structure of a substance
Reactants
a substance that takes part in and undergoes change during a reaction. Usually there from the start
Product
substance that is formed when two or more chemicals react
Activation energy
the minimum quantity of energy that the reacting species must possess in order to undergo a specified reaction.
The hump in a graph.
How do enzymes affect activation energy?
Enzymes lower activation energy
Exergonic
characteristic & types
•more E in P than R
Hydrolysis
Cellular respiration
Endergonic
Characteristic and types
•more E in R than P
Photosynthesis
Condensation
Endergonic on a graph
Goes up
Reaction on bottom
Product on top
Exergonic on a graph
Goes down
Reaction on top
Product on bottom
Energy is required to join the P to ADP
Endergonic
When the 3rd P group is broken off lots of E is released
Exergonic
We recycle E in the cell by what?
ATP/ADP cycle
Adenosine+ (P+P+P)
ATP
adenosine + (P+P)
ADP
ADP or ATP has more stored energy?
ATP
