Chemical Reactions
Enzymes
Types of Reactions
Photosynthesis
Cellular Respiration
100
What are substances that undergo a change in chemical reactions?
Reactants (substrates)
100
What are enzymes made of?
Proteins
100
What type of reaction absorbs energy?
Endothermic Reaction
100
Where does the energy for photosynthesis comes from?
The sun
100
Why is cellular respiration considered an exothermic reaction?
It releases energy when sugar is broken down.
200
What do we call the substances formed as a result of a chemical reaction?
Products
200
What is the role of enzymes in biochemical reactions?
They speed up reactions by lowering activation energy
200
What reactions releases energy?
Exothermic Reactions
200
What is the main product of photosynthesis?
Glucose (sugar)
200
What is the energy source released in cellular respiration?
ATP
300
Name the two types of chemical reactions?
Exothermic and Endothermic Reactions
300
What kind of model is this image showing.
A lock and key model
300
What is an example of exothermic reaction?
Cellular Respiration
300
Why is photosynthesis an endothermic reaction?
It absorbs energy, and its products have more energy than the substrates.
300
How can having more substrates affect the rate of reactions for cellular respiration?
The more substrate present the faster the reactions because there are more collisions.
400
Which reactions creates products with less energy than the reactants?
Exothermic Reaction
400
What happens to an enzyme after a chemical reaction?
They are used over and over again
400
How do enzymes affect the activation energy of chemical reactions?
They lower the activation energy need to cause a reaction. Can speed up reaction rates
400
This organelle in plant cells only is where photosynthesis takes place.
Chloroplast
400
This powerhouse of the cell is the place of cellular respiration
Mitochondria
500
Define activation energy
The amount of energy needed to start a chemical reaction
500
What is denaturation?
When the active site of an enzyme gets deformed and looses their specific shape. Loss of biochemical activity
500
What is the role of a competitive inhibitor?
Slows down reactions by competing with the substrate for the active site on the enzyme
500
What is the chemical equation for photosynthesis?
CO2 + H2O --> C6 H12 O2
6CO2 + 6H2O --> C6 H12 6O2
Carbon Dioxide + Water= Sugar
500
What is the chemical equation for cellular respiration?
C6 H12 O6 + 6O2 --> 6CO2 + 6H2O
C6 H12 O6 + O2 --> CO2 + H2O
Sugar + Oxygen --> Carbon Dioxide + Water