UCI Bio 93 Midterm 2 Exam Questions With 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 th...
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
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
, /.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
/.What is the purpose of NADH? - Answer-Transfers electrons from food to electron
transport chain.
/.Pyruvate is converted to what compound? - Answer-Acetyl CoA
/.Where does the citric acid cycle occur? - Answer-In the mitochondrial matrix
/.What happens in substrate-level phosphorylation? - Answer-A substrate gives a
phosphate to ADP, making a product and ATP
/.Where does oxidative phosphorylation happen? - Answer-The inner mitochondrial
membrane
/.About how many ATP/Glucose is made during cellular respiration? - Answer-30-32
/.What is ATP Synthase? - Answer-An enzyme that makes ATP from ADP and inorganic
phosphates.
/.What is chemiosmosis? - Answer-energy stored as a hydrogen ion gradient across a
membrane is used to drive cellular work.
/.Establishing the H+ gradient is a major function of what? - Answer-The electron
transport chain
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