WGU Biochemistry OA Exam Questions
With New Update Answers
/. Bohr Effect chart (low pH) - Answer-C- High CO2
H- High H+
A- Acidic
R-Release of O2(rt. Shift)
T- tense state (in tissues)
/.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
-Polar uncharged
/.Which type of mammalian DNA damage repair requires the presence of the
chromosome that is homologous to the damaged chromosome? - Answer-
Recombination
/.Xeroxerma Pigmentosum (XP) - 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? - Answer-The mutation of all other genes is higher due to failure to repair.
/.Assuming 100% reaction efficiency, how many DNA copies are created after the
completion of 4 complete PCR cycles? - Answer-16
With New Update Answers
/. Bohr Effect chart (low pH) - Answer-C- High CO2
H- High H+
A- Acidic
R-Release of O2(rt. Shift)
T- tense state (in tissues)
/.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
-Polar uncharged
/.Which type of mammalian DNA damage repair requires the presence of the
chromosome that is homologous to the damaged chromosome? - Answer-
Recombination
/.Xeroxerma Pigmentosum (XP) - 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? - Answer-The mutation of all other genes is higher due to failure to repair.
/.Assuming 100% reaction efficiency, how many DNA copies are created after the
completion of 4 complete PCR cycles? - Answer-16
