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- 1. Multiple Choice
Which term most precisely describes the cellular process of breaking down large molecules into smaller ones?
Catalysis
metabolism
anabolism
dehydration
catabolism
- 2. Multiple Choice
Which of the following is TRUE for anabolic pathways?
They do not depend on enzymes.
They are usually highly spontaneous chemical reactions.
They consume energy to build up polymers from monomers.
They release energy as they degrade polymers to monomers.
- 3. Multiple Choice
Which of the following is a statement of the first law of thermodynamics?
Energy cannot be created or destroyed.
The entropy of the universe is decreasing.
The entropy of the universe is constant.
Energy cannot be transferred or transformed.
- 4. Multiple Choice
Which of the following is an example of potential rather than kinetic energy?
a boy mowing grass
water rushing over Padsan River
a firefly using light flashes to attract a mate
a food molecule made up of energy-rich macromolecules
- 5. Multiple Choice
Which of the following is considered an open system?
an organism
liquid in a corked bottle
a sealed terrarium
food cooking in a pressure cooker
- 6. Multiple Choice
Which of the following is true for all exergonic reactions?
The products have more total energy than the reactants.
The reaction proceeds with a net release of free energy.
Some reactants will be converted to products.
A net input of energy from the surroundings is required for the reactions to proceed.
The reactions are nonspontaneous.
- 7. Multiple Choice
Why is ATP an important molecule in metabolism?
Its hydrolysis provides an input of free energy for exergonic reactions.
It provides energy coupling between exergonic and endergonic reactions.
Its terminal phosphate group contains a strong covalent bond that when hydrolyzed releases free energy.
Its terminal phosphate bond has higher energy than the other two.
- 8. Multiple Choice
What term is used to describe the transfer of free energy from catabolic pathways to anabolic pathways?
metabolism
bioenergetics
energy coupling
entropy
- 9. Multiple Choice
Which of the following statements is TRUE concerning catabolic pathways?
They combine molecules into more energy-rich molecules.
They are usually coupled with anabolic pathways to which they supply energy in the form of ATP.
They are endergonic.
They build up complex molecules such as protein from simpler compounds.
- 10. Multiple Choice
When chemical, transport, or mechanical work is done by an organism, what happens to the heat generated?
It is used to power yet more cellular work.
It is used to store energy as more ATP.
It is used to generate ADP from nucleotide precursors.
It is lost to the environment.
- 11. Multiple Choice
When ATP releases some energy, it also releases inorganic phosphate. What purpose does this serve (if any) in the cell?
It is released as an excretory waste.
It can only be used to regenerate more ATP.
It can be added to water and excreted as a liquid.
It can be added to other molecules in order to activate them.
It can enter the nucleus to affect gene expression.
- 12. Multiple Choice
In a metabolic pathway, all steps are catalyzed by a specific enzyme.
True
False
- 13. Multiple Choice
Which of the following concepts refer to the totality of an organism's chemical reactions?
catabolism
anabolism
metabolism
bioenergetics
- 14. Multiple Choice
Which of the following forms of energy is shown by a dancing ballerina?
thermal energy
kinetic energy
chemical energy
potential energy
- 15. Multiple Choice
Which of the following correctly defines thermodynamics?
It is the capacity to cause change.
It is the study of how organisms manage their energy resources.
It is the study of energy transformations.
It is the use of an exergonic process to drive an endergonic one.
- 16. Multiple Choice
Which of the following does not belong to the structural composition of ATP?
ribose
adenine
3 phosphate groups
inorganic phosphate
- 17. Multiple Choice
What process breaks down the bonds between the phosphate groups of ATP's tail?
catabolism
phosphorylation
hydrolysis
anabolism
- 18. Multiple Choice
What do you call the process when ATP transfers a phosphate group to some other molecule such as a reactant?
anabolism
metabolism
hydrolysis
phosphorylation
- 19. Multiple Choice
What do you call the third phosphate (Pi) that is released when ATP is hydrolyzed?
inorganic phosphate
intermediate phosphate
immediate phosphate
interactive phosphate
- 20. Multiple Choice
Which of the following reactions requires an input of energy from its surroundings?
catabolic
anabolic
endergonic
exergonic
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