WGU Biochemistry OA UPDATED
ACTUAL Exam Questions and CORRECT
Answers
Bohr Effect chart (low pH) - CORRECT ANSWER - C- High CO2
H- High H+
A- Acidic
R-Release of O2(rt. Shift)
T- tense state (in tissues)
Primary structure - CORRECT ANSWER - Sequence of amino acids that make up a
protein
Secondary Structure - CORRECT ANSWER - Sequence of amino acids fold.
Tertiary Structure - CORRECT ANSWER - -more folding in a 3D shape.
-R groups (side chains)
Quaternary Structure - CORRECT ANSWER - Protein has more than 1 polypeptide chain.
Chemical reaction - CORRECT ANSWER - -absorb and release energy
-activation energy
-energy is released (heat & light) when bonds are broken.
Exothermic reaction - CORRECT ANSWER - Exo=to release
Thermo=heat
-chemical reaction that releases more energy than it absorbs (as heat & light)
,Example of exothermic reaction - CORRECT ANSWER - Cellular respiration- breaks
down glucose to make cellular energy
Endothermic reaction - CORRECT ANSWER - Endo=absorb
Thermos=heat
-absorbs more energy than it releases
Example of endothermic reaction - CORRECT ANSWER - Photosynthesis- takes in light
to break down to create glucose
Catalyst - CORRECT ANSWER - Substance that will decrease the activation energy
needed to start a chemical reaction
Enzymes - CORRECT ANSWER - -catalysts used by cells
-increase the rate of chemical reaction
-specific to substrates
Enzyme structure - CORRECT ANSWER - -they are proteins
-twist, fold, bend to final shape
-shape attracts specific molecules
Substrate - CORRECT ANSWER - Molecules that bind to the enzyme
Active site - CORRECT ANSWER - -location on enzyme where substrate binds
Function of DNA polymerase in process of PCR. - CORRECT ANSWER - -increase
expression
-2 genes
-SIRT1 & SIRT2
, Function of a molecule - CORRECT 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? - CORRECT ANSWER - Produce lipids with shorter fatty
acid chains
Function of cholesterol - CORRECT ANSWER - Maintains membrane fluidity
Lipid (fat) soluble vitamins - CORRECT ANSWER - A, D, E, K
What stimulates beta-oxidation of fatty acids? - CORRECT 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? - CORRECT ANSWER - Acetone is produced in the blood
Amino acids - CORRECT ANSWER - -Non-polar (hydrophobic)
-Polar charged
-Polar uncharged
Which type of mammalian DNA damage repair requires the presence of the chromosome that is
homologous to the damaged chromosome? - CORRECT ANSWER - Recombination
Xeroxerma Pigmentosum (XP) - CORRECT ANSWER - A recessive genetic disease that
occurs when one or more of the genes that perform nucleotide excision repair are nonfunctional
Why do XP patients have a much higher incidence of skin cancer than the general population? -
CORRECT ANSWER - The mutation of all other genes is higher due to failure to repair.
ACTUAL Exam Questions and CORRECT
Answers
Bohr Effect chart (low pH) - CORRECT ANSWER - C- High CO2
H- High H+
A- Acidic
R-Release of O2(rt. Shift)
T- tense state (in tissues)
Primary structure - CORRECT ANSWER - Sequence of amino acids that make up a
protein
Secondary Structure - CORRECT ANSWER - Sequence of amino acids fold.
Tertiary Structure - CORRECT ANSWER - -more folding in a 3D shape.
-R groups (side chains)
Quaternary Structure - CORRECT ANSWER - Protein has more than 1 polypeptide chain.
Chemical reaction - CORRECT ANSWER - -absorb and release energy
-activation energy
-energy is released (heat & light) when bonds are broken.
Exothermic reaction - CORRECT ANSWER - Exo=to release
Thermo=heat
-chemical reaction that releases more energy than it absorbs (as heat & light)
,Example of exothermic reaction - CORRECT ANSWER - Cellular respiration- breaks
down glucose to make cellular energy
Endothermic reaction - CORRECT ANSWER - Endo=absorb
Thermos=heat
-absorbs more energy than it releases
Example of endothermic reaction - CORRECT ANSWER - Photosynthesis- takes in light
to break down to create glucose
Catalyst - CORRECT ANSWER - Substance that will decrease the activation energy
needed to start a chemical reaction
Enzymes - CORRECT ANSWER - -catalysts used by cells
-increase the rate of chemical reaction
-specific to substrates
Enzyme structure - CORRECT ANSWER - -they are proteins
-twist, fold, bend to final shape
-shape attracts specific molecules
Substrate - CORRECT ANSWER - Molecules that bind to the enzyme
Active site - CORRECT ANSWER - -location on enzyme where substrate binds
Function of DNA polymerase in process of PCR. - CORRECT ANSWER - -increase
expression
-2 genes
-SIRT1 & SIRT2
, Function of a molecule - CORRECT 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? - CORRECT ANSWER - Produce lipids with shorter fatty
acid chains
Function of cholesterol - CORRECT ANSWER - Maintains membrane fluidity
Lipid (fat) soluble vitamins - CORRECT ANSWER - A, D, E, K
What stimulates beta-oxidation of fatty acids? - CORRECT 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? - CORRECT ANSWER - Acetone is produced in the blood
Amino acids - CORRECT ANSWER - -Non-polar (hydrophobic)
-Polar charged
-Polar uncharged
Which type of mammalian DNA damage repair requires the presence of the chromosome that is
homologous to the damaged chromosome? - CORRECT ANSWER - Recombination
Xeroxerma Pigmentosum (XP) - CORRECT ANSWER - A recessive genetic disease that
occurs when one or more of the genes that perform nucleotide excision repair are nonfunctional
Why do XP patients have a much higher incidence of skin cancer than the general population? -
CORRECT ANSWER - The mutation of all other genes is higher due to failure to repair.
