1
UCI BIO 93 MIDTERM 2 EXAM ACTUAL
2025/2026 QUESTIONS AND 100%
CORRECT ANSWERS
What is a metabolic pathway? - (ANSWER)A pathway that a molecule goes
through, resulting in a specific product.
What is metabolism? - (ANSWER)The totality of an organisms chemical reactions
Gibbs free energy - (ANSWER)Portion of a system that can perform work when
temp and pressure are uniform throughout the system.
What is a way to show change in free energy? - (ANSWER)
What does a negative Delta G mean? - (ANSWER)A process that is spontaneous
What does spontaneous mean? - (ANSWER)Means that a process will occur.
What happens to the energy in a exergonic reaction? - (ANSWER)It is released
What happens to the energy in an endergonic reaction? - (ANSWER)It is
consumed in the reaction.
True or False
,2
A cell must have endergonic and exergonic reactions - (ANSWER)True
Is ATP Hydrolysis an exergonic or endergonic reaction? - (ANSWER)Exergonic
Mechanical and Transport work are what kind of reactions? -
(ANSWER)Endergonic
Why does ATP hydrolysis release so much energy? - (ANSWER)All 3 phosphate
groups ate neg. charged, so there is mutual repulsion within all of them
What do enzymes do? - (ANSWER)Lower energy barriers to drive chemical
reactions
What does the suffix -ase usually mean? - (ANSWER)An enzyme
How does an exergonic energy profile look like? - (ANSWER)
Enzymes are biological ___________ - (ANSWER)Catalysts
What is the site of cellular respiration in all eukaryotic cells? -
(ANSWER)Mitochondria
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In Biology, what is another word for the addition of electrons to a substance? -
(ANSWER)Reduction
In Biology, what is another word for the loss of electrons to a substance? -
(ANSWER)Oxidation
What is cellular respiration? - (ANSWER)Catabolic reactions used to generate ATP
Where does glycolysis happen? - (ANSWER)In the cytosol
What is glycolysis? - (ANSWER)The breaking down of glucose into 2 molecules of
a compound of pyruvate.
What happens in the citric acid cycle? - (ANSWER)The breakdown of glucose to
carbon dioxide is completed.
What is stage 1 of cellular respiration? - (ANSWER)Glycolysis
What is stage 2 of cellular respiration? - (ANSWER)Pyruvate oxidation and citric
acid cycle
What is stage 3 of cellular respiration? - (ANSWER)Oxidative Phosphorylation
UCI BIO 93 MIDTERM 2 EXAM ACTUAL
2025/2026 QUESTIONS AND 100%
CORRECT ANSWERS
What is a metabolic pathway? - (ANSWER)A pathway that a molecule goes
through, resulting in a specific product.
What is metabolism? - (ANSWER)The totality of an organisms chemical reactions
Gibbs free energy - (ANSWER)Portion of a system that can perform work when
temp and pressure are uniform throughout the system.
What is a way to show change in free energy? - (ANSWER)
What does a negative Delta G mean? - (ANSWER)A process that is spontaneous
What does spontaneous mean? - (ANSWER)Means that a process will occur.
What happens to the energy in a exergonic reaction? - (ANSWER)It is released
What happens to the energy in an endergonic reaction? - (ANSWER)It is
consumed in the reaction.
True or False
,2
A cell must have endergonic and exergonic reactions - (ANSWER)True
Is ATP Hydrolysis an exergonic or endergonic reaction? - (ANSWER)Exergonic
Mechanical and Transport work are what kind of reactions? -
(ANSWER)Endergonic
Why does ATP hydrolysis release so much energy? - (ANSWER)All 3 phosphate
groups ate neg. charged, so there is mutual repulsion within all of them
What do enzymes do? - (ANSWER)Lower energy barriers to drive chemical
reactions
What does the suffix -ase usually mean? - (ANSWER)An enzyme
How does an exergonic energy profile look like? - (ANSWER)
Enzymes are biological ___________ - (ANSWER)Catalysts
What is the site of cellular respiration in all eukaryotic cells? -
(ANSWER)Mitochondria
, 3
In Biology, what is another word for the addition of electrons to a substance? -
(ANSWER)Reduction
In Biology, what is another word for the loss of electrons to a substance? -
(ANSWER)Oxidation
What is cellular respiration? - (ANSWER)Catabolic reactions used to generate ATP
Where does glycolysis happen? - (ANSWER)In the cytosol
What is glycolysis? - (ANSWER)The breaking down of glucose into 2 molecules of
a compound of pyruvate.
What happens in the citric acid cycle? - (ANSWER)The breakdown of glucose to
carbon dioxide is completed.
What is stage 1 of cellular respiration? - (ANSWER)Glycolysis
What is stage 2 of cellular respiration? - (ANSWER)Pyruvate oxidation and citric
acid cycle
What is stage 3 of cellular respiration? - (ANSWER)Oxidative Phosphorylation
