WGU BIOCHEMISTRY OA TEST BANK 2026
FULL QUESTIONS AND ANSWERS
ACCURATE SOLUTION PACK
●● Primary structure.
Answer: Sequence of amino acids that make up a protein
●● Secondary Structure.
Answer: Sequence of amino acids fold.
●● Tertiary Structure.
Answer: -more folding in a 3D shape.
-R groups (side chains)
●● Quaternary Structure.
Answer: Protein has more than 1 polypeptide chain.
●● Chemical reaction.
Answer: -absorb and release energy
-activation energy
-energy is released (heat & light) when bonds are broken.
,●● Exothermic reaction.
Answer: Exo=to release
Thermo=heat
-chemical reaction that releases more energy than it absorbs (as heat &
light)
●● Example of exothermic reaction.
Answer: Cellular respiration- breaks down glucose to make cellular
energy
●● Endothermic reaction.
Answer: Endo=absorb
Thermos=heat
-absorbs more energy than it releases
●● Example of endothermic reaction.
Answer: Photosynthesis- takes in light to break down to create glucose
●● Catalyst.
Answer: Substance that will decrease the activation energy needed to
start a chemical reaction
,●● Enzymes.
Answer: -catalysts used by cells
-increase the rate of chemical reaction
-specific to substrates
●● Enzyme structure.
Answer: -they are proteins
-twist, fold, bend to final shape
-shape attracts specific molecules
●● Substrate.
Answer: Molecules that bind to the enzyme
●● Active site.
Answer: -location on enzyme where substrate binds
●● Function of DNA polymerase in process of PCR..
Answer: -increase expression
-2 genes
-SIRT1 & SIRT2
●● Function of a molecule.
, Answer: 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?.
Answer: Produce lipids with shorter fatty acid chains
●● Function of cholesterol.
Answer: Maintains membrane fluidity
●● Lipid (fat) soluble vitamins.
Answer: A, D, E, K
●● What stimulates beta-oxidation of fatty acids?.
Answer: An increase in NAD+ concentration in the mitochondrial
matrix
●● What occurs in an otherwise healthy person whose diet has very few
carbs and high levels of fats?.
Answer: Acetone is produced in the blood
●● Amino acids.
Answer: -Non-polar (hydrophobic)
-Polar charged
FULL QUESTIONS AND ANSWERS
ACCURATE SOLUTION PACK
●● Primary structure.
Answer: Sequence of amino acids that make up a protein
●● Secondary Structure.
Answer: Sequence of amino acids fold.
●● Tertiary Structure.
Answer: -more folding in a 3D shape.
-R groups (side chains)
●● Quaternary Structure.
Answer: Protein has more than 1 polypeptide chain.
●● Chemical reaction.
Answer: -absorb and release energy
-activation energy
-energy is released (heat & light) when bonds are broken.
,●● Exothermic reaction.
Answer: Exo=to release
Thermo=heat
-chemical reaction that releases more energy than it absorbs (as heat &
light)
●● Example of exothermic reaction.
Answer: Cellular respiration- breaks down glucose to make cellular
energy
●● Endothermic reaction.
Answer: Endo=absorb
Thermos=heat
-absorbs more energy than it releases
●● Example of endothermic reaction.
Answer: Photosynthesis- takes in light to break down to create glucose
●● Catalyst.
Answer: Substance that will decrease the activation energy needed to
start a chemical reaction
,●● Enzymes.
Answer: -catalysts used by cells
-increase the rate of chemical reaction
-specific to substrates
●● Enzyme structure.
Answer: -they are proteins
-twist, fold, bend to final shape
-shape attracts specific molecules
●● Substrate.
Answer: Molecules that bind to the enzyme
●● Active site.
Answer: -location on enzyme where substrate binds
●● Function of DNA polymerase in process of PCR..
Answer: -increase expression
-2 genes
-SIRT1 & SIRT2
●● Function of a molecule.
, Answer: 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?.
Answer: Produce lipids with shorter fatty acid chains
●● Function of cholesterol.
Answer: Maintains membrane fluidity
●● Lipid (fat) soluble vitamins.
Answer: A, D, E, K
●● What stimulates beta-oxidation of fatty acids?.
Answer: An increase in NAD+ concentration in the mitochondrial
matrix
●● What occurs in an otherwise healthy person whose diet has very few
carbs and high levels of fats?.
Answer: Acetone is produced in the blood
●● Amino acids.
Answer: -Non-polar (hydrophobic)
-Polar charged
