WGU Biochemistry OA Exam Questions
and Verified Answers | Already Graded
A+
Bohr Effect chart (low pH) - ✔✔C- High CO2
H- High H+
A- Acidic
R-Release of O2(rt. Shift)
T- tense state (in tissues)
Primary structure - ✔✔Sequence of amino acids that make up a protein
Secondary Structure - ✔✔Sequence of amino acids fold.
Tertiary Structure - ✔✔-more folding in a 3D shape.
-R groups (side chains)
Quaternary Structure - ✔✔Protein has more than 1 polypeptide chain.
1
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,Chemical reaction - ✔✔-absorb and release energy
-activation energy
-energy is released (heat & light) when bonds are broken.
Exothermic reaction - ✔✔Exo=to release
Thermo=heat
-chemical reaction that releases more energy than it absorbs (as heat &
light)
Example of exothermic reaction - ✔✔Cellular respiration- breaks down
glucose to make cellular energy
Endothermic reaction - ✔✔Endo=absorb
Thermos=heat
-absorbs more energy than it releases
Example of endothermic reaction - ✔✔Photosynthesis- takes in light to
break down to create glucose
Catalyst - ✔✔Substance that will decrease the activation energy needed to
start a chemical reaction
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, Enzymes - ✔✔-catalysts used by cells
-increase the rate of chemical reaction
-specific to substrates
Enzyme structure - ✔✔-they are proteins
-twist, fold, bend to final shape
-shape attracts specific molecules
Substrate - ✔✔Molecules that bind to the enzyme
Active site - ✔✔-location on enzyme where substrate binds
Function of DNA polymerase in process of PCR. - ✔✔-increase expression
-2 genes
-SIRT1 & SIRT2
Function of a molecule - ✔✔Structural component of the lipid bilayer
How would lipid production in a cell change in order to maintain fluidity of
its cell membrane as it adapts to lower temperatures? - ✔✔Produce lipids
with shorter fatty acid chains
Function of cholesterol - ✔✔Maintains membrane fluidity
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
and Verified Answers | Already Graded
A+
Bohr Effect chart (low pH) - ✔✔C- High CO2
H- High H+
A- Acidic
R-Release of O2(rt. Shift)
T- tense state (in tissues)
Primary structure - ✔✔Sequence of amino acids that make up a protein
Secondary Structure - ✔✔Sequence of amino acids fold.
Tertiary Structure - ✔✔-more folding in a 3D shape.
-R groups (side chains)
Quaternary Structure - ✔✔Protein has more than 1 polypeptide chain.
1
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
,Chemical reaction - ✔✔-absorb and release energy
-activation energy
-energy is released (heat & light) when bonds are broken.
Exothermic reaction - ✔✔Exo=to release
Thermo=heat
-chemical reaction that releases more energy than it absorbs (as heat &
light)
Example of exothermic reaction - ✔✔Cellular respiration- breaks down
glucose to make cellular energy
Endothermic reaction - ✔✔Endo=absorb
Thermos=heat
-absorbs more energy than it releases
Example of endothermic reaction - ✔✔Photosynthesis- takes in light to
break down to create glucose
Catalyst - ✔✔Substance that will decrease the activation energy needed to
start a chemical reaction
2
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
, Enzymes - ✔✔-catalysts used by cells
-increase the rate of chemical reaction
-specific to substrates
Enzyme structure - ✔✔-they are proteins
-twist, fold, bend to final shape
-shape attracts specific molecules
Substrate - ✔✔Molecules that bind to the enzyme
Active site - ✔✔-location on enzyme where substrate binds
Function of DNA polymerase in process of PCR. - ✔✔-increase expression
-2 genes
-SIRT1 & SIRT2
Function of a molecule - ✔✔Structural component of the lipid bilayer
How would lipid production in a cell change in order to maintain fluidity of
its cell membrane as it adapts to lower temperatures? - ✔✔Produce lipids
with shorter fatty acid chains
Function of cholesterol - ✔✔Maintains membrane fluidity
3
©NINJANERD 2025/2026. YEAR PUBLISHED 2025.
