Biology 1406 Blinn EXAM 3 Questions
with Verified Detailed Answers | Graded
A+
metabolism - ✔✔totality of an organisms chemical reactions
metabolic pathway - ✔✔begins with a specific molecule and ends with a
product, each step catalyzed by a specific enzyme
catabolic pathways - ✔✔release energy by breaking down complex molecules
into simpler compounds (exergonic)
anabolic pathways - ✔✔consume energy to build complex molecule from
simpler ones (endergonic)
1st law of thermodynamics - ✔✔energy can be transferred and transformed but
cannot be created or destroyed
2nd law of thermodynamics - ✔✔every energy transfer or transformation
increases the entropy (disorder) of the universe
exergonic reaction - ✔✔proceeds with net release of free energy and is
spontaneous (negative change in G)
endergonic reaction - ✔✔absorbs free energy from its surrounds and is non
spontaneous; requires addition of free energy (positive change in G)
1|Page
©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
, 3 main kinds of work cell does - ✔✔-chemical
-transport
-mechanical
energy coupling - ✔✔use of an exergonic process to drive an endergonic one;
coupled reactions are exergonic
how ATP drives endergonic reactions - ✔✔phosphorylation (transferring a
phosphate group to some other molecule. or a phosphorylated intermediate)
ATP regenerated by - ✔✔addition of phosphate group to ADP
ADP phosphorylated by _____ reactions in the cell - ✔✔catabolic
activation energy - ✔✔the initiation energy needed to start chemical reactions;
enzymes catalyze reactions by lowering this
enzymes do not affect the ______ - ✔✔change in free energy
substrate - ✔✔the reactant that an enzyme acts on
enzyme substrate complex - ✔✔enzyme binds to its substrate
active site - ✔✔the region on the enzyme where the substrate bonds
induced fit - ✔✔substrate brings chemical groups of the active side into the
positions that enhance their ability to catalyze the reaction
2|Page
©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
with Verified Detailed Answers | Graded
A+
metabolism - ✔✔totality of an organisms chemical reactions
metabolic pathway - ✔✔begins with a specific molecule and ends with a
product, each step catalyzed by a specific enzyme
catabolic pathways - ✔✔release energy by breaking down complex molecules
into simpler compounds (exergonic)
anabolic pathways - ✔✔consume energy to build complex molecule from
simpler ones (endergonic)
1st law of thermodynamics - ✔✔energy can be transferred and transformed but
cannot be created or destroyed
2nd law of thermodynamics - ✔✔every energy transfer or transformation
increases the entropy (disorder) of the universe
exergonic reaction - ✔✔proceeds with net release of free energy and is
spontaneous (negative change in G)
endergonic reaction - ✔✔absorbs free energy from its surrounds and is non
spontaneous; requires addition of free energy (positive change in G)
1|Page
©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
, 3 main kinds of work cell does - ✔✔-chemical
-transport
-mechanical
energy coupling - ✔✔use of an exergonic process to drive an endergonic one;
coupled reactions are exergonic
how ATP drives endergonic reactions - ✔✔phosphorylation (transferring a
phosphate group to some other molecule. or a phosphorylated intermediate)
ATP regenerated by - ✔✔addition of phosphate group to ADP
ADP phosphorylated by _____ reactions in the cell - ✔✔catabolic
activation energy - ✔✔the initiation energy needed to start chemical reactions;
enzymes catalyze reactions by lowering this
enzymes do not affect the ______ - ✔✔change in free energy
substrate - ✔✔the reactant that an enzyme acts on
enzyme substrate complex - ✔✔enzyme binds to its substrate
active site - ✔✔the region on the enzyme where the substrate bonds
induced fit - ✔✔substrate brings chemical groups of the active side into the
positions that enhance their ability to catalyze the reaction
2|Page
©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025.
