WGU Biochemistry OA Exam Questions and Answers

WGU Biochemistry OA Exam Questions and Answers Bohr Effect chart (low pH) - Ans:-C- High CO2 H- High H+ A- Acidic R-Release of O2(rt. Shift) T- tense state (in tissues) Primary structure - Ans:-Sequence of amino acids that make up a protein Secondary Structure - Ans:-Sequence of amino acids fold. Tertiary Structure - Ans:--more folding in a 3D shape. -R groups (side chains) Quaternary Structure - Ans:-Protein has more than 1 polypeptide chain. Chemical reaction - Ans:--absorb and release energy ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/26 -activation energy -energy is released (heat & light) when bonds are broken. Exothermic reaction - Ans:-Exo=to release Thermo=heat -chemical reaction that releases more energy than it absorbs (as heat & light) Example of exothermic reaction - Ans:-Cellular respiration- breaks down glucose to make cellular energy Endothermic reaction - Ans:-Endo=absorb Thermos=heat -absorbs more energy than it releases Example of endothermic reaction - Ans:-Photosynthesis- takes in light to break down to create glucose Catalyst - Ans:-Substance that will decrease the activation energy needed to start a chemical reaction Enzymes - Ans:--catalysts used by cells -increase the rate of chemical reaction ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/26 -specific to substrates Enzyme structure - Ans:--they are proteins -twist, fold, bend to final shape -shape attracts specific molecules Substrate - Ans:-Molecules that bind to the enzyme Active site - Ans:--location on enzyme where substrate binds Function of DNA polymerase in process of PCR. - Ans:--increase expression -2 genes -SIRT1 & SIRT2 Function of a molecule - Ans:-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? - Ans:-Produce lipids with shorter fatty acid chains Function of cholesterol - Ans:-Maintains membrane fluidity Lipid (fat) soluble vitamins - Ans:-A, D, E, K ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/26 What stimulates beta-oxidation of fatty acids? - Ans:-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? - Ans:-Acetone is produced in the blood Amino acids - Ans:--Non-polar (hydrophobic) -Polar charged -Polar uncharged Which type of mammalian DNA damage repair requires the presenc