Biology Exam #2
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, Biology Exam #2 Biology Exam #2
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1. __is the branch of chemistry dealing with energy Thermodynamics
changes.
2. Energy is defined as the capacity to do __ Work
3. Distinguish between Kinetic and Potential energy. Kinetic - energy of motion
Potential- Stored energy
4. __ describes the loss of an electron; ___ is the gain Oxidation; Reduction
of an electron.
5. Oxidation-Reduction reactions are called ___ reac- Redox reactions
tions for short.
6. The First Law of Thermodynamics states that en- Changed
ergy cannot be created nor destroyed but can be
___ to another form.
7. In energy conversions, what is a very common Heat; high to low quality
form of "lost" energy?
8. Energy __ from the Sun to the Earth and through Flows
biological systems.
9. The Second Law of Thermodynamics indicated Disorder; entropy
that in energy transformations, there is an in-
creasing amount of randomness or ____ which is
formally called __?
10. Usable energy is called ___ ___ Free energy
11. Reactions that require energy input are ___-gonic. Endergonic
12. Reactions that release energy are ___-gonic. Exergonic
, Biology Exam #2 Biology Exam #2
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13. The extra energy required to initiate a reaction is Activation Energy
called ___ energy.
14. The preferred method of initiating a reaction in a Catalyst
living system is to use a ___, like a enzyme.
15. The energy "currency" for living systems is the ATP
nucleotide molecule called ___?
16. What are the THREE main component parts of an 1.) 5 carbon sugar ribose
ATP molecule? 2.) adenine
3.) chain of 3 phosphates
17. Which of the phosphate groups releases the most 3rd and Final
energy when it is removed from ATP?
18. What happens during the ATP/ADP cycle? Cells use exergonic reactions for
energy to synthesize then hydrol-
ysis of ATP to provide energy to
divide
19. ADP + Pi --> ATP is an ____-gonic reaction. Endergonic
20. ___ biological catalysts that lower activation ener- Enzyme; changed or consumed
gies but are not ___ during reaction.
21. ___(another name for reactants) bind to the ___ Substrate; active site; en-
site of enzymes to form a temporary ___-___ com- zyme-substrate complex
plex
22. Sometimes the binding of the substrate causes Induced
the enzyme to change it's shape slightly in what
is called an ____ fit.
2025/2026 Exam Prep
Questions and Answers
A+ Grades Guarantee
, Biology Exam #2 Biology Exam #2
Study online at https://quizlet.com/_6qj7t
1. __is the branch of chemistry dealing with energy Thermodynamics
changes.
2. Energy is defined as the capacity to do __ Work
3. Distinguish between Kinetic and Potential energy. Kinetic - energy of motion
Potential- Stored energy
4. __ describes the loss of an electron; ___ is the gain Oxidation; Reduction
of an electron.
5. Oxidation-Reduction reactions are called ___ reac- Redox reactions
tions for short.
6. The First Law of Thermodynamics states that en- Changed
ergy cannot be created nor destroyed but can be
___ to another form.
7. In energy conversions, what is a very common Heat; high to low quality
form of "lost" energy?
8. Energy __ from the Sun to the Earth and through Flows
biological systems.
9. The Second Law of Thermodynamics indicated Disorder; entropy
that in energy transformations, there is an in-
creasing amount of randomness or ____ which is
formally called __?
10. Usable energy is called ___ ___ Free energy
11. Reactions that require energy input are ___-gonic. Endergonic
12. Reactions that release energy are ___-gonic. Exergonic
, Biology Exam #2 Biology Exam #2
Study online at https://quizlet.com/_6qj7t
13. The extra energy required to initiate a reaction is Activation Energy
called ___ energy.
14. The preferred method of initiating a reaction in a Catalyst
living system is to use a ___, like a enzyme.
15. The energy "currency" for living systems is the ATP
nucleotide molecule called ___?
16. What are the THREE main component parts of an 1.) 5 carbon sugar ribose
ATP molecule? 2.) adenine
3.) chain of 3 phosphates
17. Which of the phosphate groups releases the most 3rd and Final
energy when it is removed from ATP?
18. What happens during the ATP/ADP cycle? Cells use exergonic reactions for
energy to synthesize then hydrol-
ysis of ATP to provide energy to
divide
19. ADP + Pi --> ATP is an ____-gonic reaction. Endergonic
20. ___ biological catalysts that lower activation ener- Enzyme; changed or consumed
gies but are not ___ during reaction.
21. ___(another name for reactants) bind to the ___ Substrate; active site; en-
site of enzymes to form a temporary ___-___ com- zyme-substrate complex
plex
22. Sometimes the binding of the substrate causes Induced
the enzyme to change it's shape slightly in what
is called an ____ fit.
