WorksheetsUnit 3 Energy Flow Concepts 1 & 2
Total questions: 37
Worksheet time: 20mins
Which phrase best describes an exothermic chemical reaction?
Does not absorb any energy.
Forms products with higher bond energy than reactants.
Is in a state of equilibrium.
Releases more energy than it absorbs.
Identify the products in this reaction:
6H2O and 6CO2
6CO2 and C6H12O6
6H2O, C6H12O6 and 6O2
C6H12O6 and 6O2
Chemical reactions that absorb more energy than they release are considered to be________________________.
exothermic
catalyzed
endothermic
anabolic
The activation energy needed for a chemical reaction is decreased by the presence of a ________________________.
catalyst
reactant
product
substrate
In the enzyme substrate pictured above, what is happening during the second picture?
The catalyzed reaction is releasing a product.
The enzyme is breaking bonds in the substrate.
The enzyme is keeping the bonds the same in the substrate.
The substrate is beginning to bind to the enzyme.
If the activation energy of a biochemical reaction is lowered, then
the reaction will happen faster.
the reaction will happen more slowly.
more energy will need to be absorbed.
the rate of the reaction will be unaffected.
The molecule that an enzyme binds to is known as its___________.
substrate
monomer
polymer
active site
Reactants bind to enzymes at the ____________________.
substrate
product
activation energy
active site
In the graph above, an increase in temperature results in
a decrease in the required activation energy.
an increase in reaction rate.
a decrease in the rate of reaction.
an increase in both the reaction rate and activation energy.
Chemical reactions change ______________and make________________.
Bonds
Reactants
Energy
Products
The activation___________is required in order for a chemical reaction to occur.
bonds
products
energy
reactants
Chemical reactions can be classified as _____________ or ____________.
endothermic
cellular respiration
exothermic
photosynthesis
An example of a reaction that releases more energy than it absorbs is _____________.
cellular respiration
photosynthesis
productive
systematic
An example of a reaction that absorbs more energy than it releases is _____________.
cellular respiration
photosynthesis
productive
systematic
All chemical reactions must break or form
reactants
bonds
connections
formulas
What does A represent on the energy diagram above?
reactants
products
activation energy
bonds
What does B represent on the energy diagram above?
reactants
products
activation energy
bonds
What does C represent on the energy diagram above?
reactants
products
activation energy
bonds
Which of the following factors will increase the rate of chemical reaction if they themselves are increased?
Temperature
pH
substrate concentration
catalysts
competitive inhibitors
Which of the following factors will decrease the rate of chemical reaction if present or changed?
Temperature
pH
substrate concentration
catalysts
competitive inhibitors
Which of the following factors will increase the rate of chemical reaction if present?
Temperature
pH
substrate concentration
catalysts
competitive inhibitors
Which macromolecule found in the food you eat will your cells break down first to get ATP?
Carbohydrates
Lipids
Proteins
Nucleic Acids
Which phrase best describes the function of the ATP molecule?
absorbs energy
increases energy
stores energy
creates energy
Energy is released from an ATP molecule for cellular processes when it
converts a phosphate group to ADP
attaches an extra phosphate group
loses a phosphate group
produces a sugar molecule
Which of the following reactions directly provides chemical energy for most cell functions?
ADP → ATP + P
ADP + P → ATP
ATP + P → ADP
ATP → ADP + P
Where does your body get the energy for reattaching a third phosphate to ADP, creating ATP?
from the sun
usually from carbs
from nucleic acids
from breaking ATP
Looking at the picture above. All of the following parts make up an ADP molecule EXCEPT
structure A
structure B
structure C
structure D
Looking at the picture above. Which structures pictured would make up an ATP molecule?
A and B only
A, B, and C
C and D only
A, B, C, and D
Looking at the picture above. Between which two letters is the bond the most unstable and easiest to break?
A and B
B and C
C and D
B and C and C and D
Looking at the picture above. What does A represent?
adenine
cytosine
phosphates
ribose
Looking at the picture above. What does B represent?
adenine
cytosine
phosphates
ribose
Looking at the picture above. What does C and D represent?
adenine
cytosine
phosphates
ribose
What is the only thing recycled during the ATP-ADP cycle?
ATP
ADP
nucleic acids
water
What is an example of something the energy released from ATP is used for?
(a)
If the food you eat is like a check, ATP is like_____________.
a saving account
a bank
cash
change
What macromolecule can your body NOT get ATP from?
Carbohydrates
Lipids
Nucleic Acids
Proteins
What is the name of the process in which ATP is made and where does it take place?
Cellular respiration and the ribosomes
Photosynthesis and the ribosomes
Cellular respiration and the mitochondria
Photosynthesis and the mitochondria
