BioChem C785 - WGU - Module 5 - All Questions and Complete Answers

BioChem C785 - WGU - Module 5 - All Questions and Complete Answers A patient who is on a no-fat diet is at particular risk of deficiency in: Correct Answer- Vitamin A Acetyl-CoA is a central to metabolism. Carbohydrat ...

BioChem C785 - WGU - Module 5 - All Questions and Complete Answers A patient who is on a no-fat diet is at particular risk of deficiency in: Correct Answer- Vitamin A Acetyl-CoA is a central to metabolism. Carbohydrates, proteins, and fats can all produce AcetylCoA, though they use different pathways to make it. Correct Answer- True Acetyl-CoA, a central molecule in metabolism, is produced in the mitochondrial matrix. However, it is used for the synthesis of fatty acids in the cytosol. The transport of the acetylCoA from the matrix to the cytosol occurs by the conversion of acetyl-CoA to Correct Answercitrate Beta oxidation of a C14 fatty acid will make 6 acetyl-CoA units after 7 rounds of beta-oxidation Correct Answer- True CH3(CH2)6CH=CH(CH2)2COOH Correct Answer- liquid at the lowest temperature Describe the steps involved in fatty acid synthesis Correct Answer- Acetyl-CoA is transported to the cytoplasm - Biotin transfers a carboxylate group to acetyl-CoA - the malonyl group is transferred to a carrier protein - malonyl ACP combines with acetyl-CoA, - malonyl-CoA is added repeatedly to the growing fatty acid Due to their amphipathic nature, phospholipids can form micelles and transport other lipids. The fatty acid chains that make up the phospholipids are the basis for their non-polar character, and the phosphate group is the basis of its polar nature Correct Answer- True During starvation, triglycerides can help supply some of the body's glucose needs. Which breakdown product of triglycerides can be used to make glucose? Correct Answer- glycerol Fats are necessary to deliver the fat-soluable vitamins such as A, D, E, and K. Absence of fat in the diet impact the absorption and delivery of the fat soluable vitamins that result in vitamin related deficiencies. Correct Answer- True Fatty acid synthesis occurs in the cytosol, so its building block molecule acetyl-CoA must be transported out of the mitochondria and into the cytosol using the citrate transport system. The acetyl-CoA is then combined with carbon dioxide with the help of the coenzyme molecule biotin in order to form malonyl-CoA in the first committed step of fatty acid synthesis. Correct Answer- True Gastric bypass surgery results in an increase in the production of GLP-1, a peptide that promotes insulin secretion. This is thought to be associated with the tendency for these patients' type II diabetes to resolve after the surgery. If a gastric bypass patient has a mutation in GLP-1 that impairs its function, what is to be expected? Correct Answer- The patient would have reduced insulin secretion compared to patients with normal GLP-1, and this reduction results in increased fatty acid oxidation How many hydrogens can be accommodated by the carbon -C-C(*)=C-C- Correct Answer- * 1 If Zoey continues on her path of a no-fat diet, she could have very poor wound healing response. Which one of the following lipid molecules can have an affect on this response? Correct Answer- phospholipid Ketoacidosis is a dangerous outcome of uncontrolled diabetes. It is a result of the buildup of ketone bodies. What is the primary metabolic fuel that results in the build-up of the ketone bodies? Correct Answer- fatty acids Mammals and plants have the ability to synthesize their fatty acids. Which one of the following molecules is the precursor to building fatty acids? Correct Answer- Acetyl-CoA Phospholipids have parts that are hydrophobic (non-polar, not soluable in water) and a part that is hydrophilic (polar; water-soluable). What term do we use to describe a molecule that is both polar and non-polar? Correct Answer- amphipathic Phospholipids that make up the cell membr