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BIOC 3021- Exam #3 Questions and Answers 100% Solved | Graded A+
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BIOC 3021- Exam #3 Questions and Answers 100% Solved | Graded A+ Catabolism - Processes that break down food for energy and building blocks -Example: glycolysis Anabolism - Processes that use energy and building blocks to make molecules we need -Example: photosynthesis Sun - All life depend...

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  • December 7, 2024
  • 19
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • BIOC 3021
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BIOC 3021- Exam #3 Questions and

Answers 100% Solved | Graded A+


Catabolism - ✔✔Processes that break down food for energy and building

blocks

-Example: glycolysis

Anabolism - ✔✔Processes that use energy and building blocks to make

molecules we need

-Example: photosynthesis

Sun - ✔✔All life depends on the energy acquired from the _________.

-Light energy is absorbed during photosynthesis, which promotes electrons

to higher energy orbitals (excited state)

-Excited electrons store energy and can transfer it to other molecules in

redox reactions

-Constant influx of energy to resist entropy

Oxidized - ✔✔Food is _______ to collect high energy electrons that are

then used to drive reactions



1
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

,Coupled reactions - ✔✔A thermodynamically unfavorable reaction (postive

ΔG) can be made to occur if coupled with a thermodynamically favorable

reaction (negative ΔG)

-Overall negative ΔG

Kinase - ✔✔An enzyme that transfers a phosphate group from one

molecule to another

Coenzyme - ✔✔A low molecular weight organic compound, which in

cooperation with an enzyme, facilitates catalysis of a reaction

-Often have a component that is derived from a vitamin

Vitamin - ✔✔A nutritional requirement since the organism is unable to

biosynthesize an adequate amount for its own use

NAD+ - ✔✔A coenzyme that collects electrons released during catabolism;

is reduced to NADH

-Form of stored chemical energy (electron carrier)

-Provides energy upon oxidation that drives synthesis of ATP

Niacin - ✔✔Vitamin component of NAD+

Nicotinamide adenine dinucleotide (NAD+) - ✔✔

2 - ✔✔The reduction of NAD+ to NADH involves _____ the transfer of

________ electrons.

2
©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

, FAD - ✔✔An electron carrier that is reduced to FADH2

Glycolysis - ✔✔The first step in the process of oxidizing glucose to get

energy from the molecule; most common pathway to harvest energy

-Reactants: 1 molecule of glucose, 2 ATP

-Products: 2 pyruvate molecules, 4 ATP (2 net), 2 NADH

Glucose - ✔✔The main fuel for human bodies; contains a lot of reduced

carbon

Facilitated diffusion - ✔✔Glucose enters into cells through three pathways:

1) diffusion, 2) __________ and 3) active transport

-The 2nd pathway listed uses the transport protein Glut-1

Investment phase - ✔✔The first phase of glycolysis (Reactions 1-5); breaks

glucose into two molecules of glyceraldehyde-3-phosphate

-Requires the spending of two ATP molecules (increasing free energy of

glucose)

Payoff phase - ✔✔The second phase of glycolysis (Reactions 6-10);

convert the two glyceraldehyde-3-phosphate into two pyruvate molecules

-Generates four ATP molecules

Hexokinase - ✔✔The enzyme required to catalyze the first reaction of

glycolysis

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©JOSHCLAY 2024/2025. YEAR PUBLISHED 2024.

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