Characteristics of Enzymes
Factors Affecting Enzymes
Definitions
Graphing Enzymes
Enzyme MCAS Questions
100
Enzymes are ___________ made up of amino acids.
proteins
100
What are 2 factors that affect enzymes?
Temperature
pH level
Salinity
100
Where do enzymes and substrates connect?
active site
100
What is the optimal temperature for THIS enzyme on the graph?
40 degrees Celsius
100
Which of the following best describes how enzymes affect chemical reactions?
A. They speed up the rate of reactions.
B. They change the reactants into ions.
C. They dissolve the products of reactions.
D. They take the place of one of the reactants.
A. They speed up the rate of reactions.
200
Enzymes ________ ___ chemical reactions.
speed up
200
Enzymes function in an optimal temperature. What is the optimal temperature?
37 degrees Celsius
200
What does optimal / optimum mean?
best
200
What is the optimal pH level for THIS enzyme on the graph?
8
200
Which of the following statements explains the importance of enzymes that check for mistakes during DNA replication?
A. The enzymes replace the DNA with RNA.
B. The enzymes speed up the rate of RNA synthesis.
C. The enzymes remove many recessive gene copies from the nucleus.
D. The enzymes prevent many genetic mutations from being expressed.
B. The enzymes speed up the rate of RNA synthesis.
300
Enzymes break down ___________ , such as carbohydrates.
molecules
300
Enzymes function at an optimal pH level. What is the optimal pH level for enzymes?
7
300
What does denature mean?
The enzyme stops working
300
Optimal Temperature
What is 35°C?
300
Enzymes would be expected to function optimally at which of the following temperatures and pH values?
A. 0°C and pH 2
B. 12°C and pH 5
C. 37°C and pH 7
D. 80°C and pH 10
C. 37°C and pH 7
400
Enzymes are proteins that end in what 3 letters?
" ASE "
400
Inhibitors stop enzymes from functioning. What do they do to an enzyme's shape?
They change the enzyme's shape
400
Enzymes are proteins made up
of __________ ________.
amino acids
400
What are the 2 factors these graphs are showing?
Temperature + pH
400
Which of the following is a primary way that enzymes affect chemical reactions?
A. They decrease the pH of the products.
B. They increases the rate of the reactions.
C. They take the place of oxygen as a reactant.
D. They change the location of the reactions in the cell.
B. They increases the rate of the reactions.
500
Enzymes can only connect to a specific substrate. They are specific like a lock and key. They connect at the __________ _______ .
active site
500
What happens to an enzyme if the temperature or pH level is too high or too low?
It will denature.
500
What is the energy needed to START a reaction?
activation energy
500
What is the optimal pH level for THIS enzyme on the graph?
6.6
500
Which of the following will most likely change when an enzyme is added to a reaction?
A. the pH of the reaction
B. the rate (speed) of the reaction
C. the products of the reaction
D. the temperature of the reaction
B. the rate (speed) of the reaction