BioChem C785 - WGU - Module 5 - all questions
and answers already graded A+| Updated &
Verified | 2024
Acetyl-CoA is a central to metabolism. Carbohydrates, proteins, and fats can all produce Acetyl-CoA,
though they use different pathways to make it. - ✔✔True
Beta oxidation of a C14 fatty acid will make 6 acetyl-CoA units after 7 rounds of beta-oxidation - ✔✔True
Mammals and plants have the ability to synthesize their fatty acids. Which one of the
following molecules is the precursor to building fatty acids? - ✔✔Acetyl-CoA
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 acetyl-CoA from the matrix to
the cytosol occurs by the conversion of acetyl-CoA to - ✔✔citrate
The inability to tolerate long-chain fatty acids in the diet could stem from a defect in - ✔✔beta-
oxidation of long-chain fatty acids
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? -
✔✔fatty acids
, 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. - ✔✔True
Which molecule is considered a lipid? - ✔✔1. sterol
2. fat
3. wax
The acid portion of a fatty acid corresponds to which one of the following groups/molecules? -
✔✔COOH is a carboxylic acid group. A fatty acid consists of a hydrocarbon chain bound to the carbon
atom of the COOH. Answer: COOH
Saturated fatty acids have more hydrogen atoms than unsaturated fatty acids of the same length -
✔✔True
How many hydrogens can be accommodated by the carbon -C-C(*)=C-C- - ✔✔* 1
Phospholipids that make up the cell membrane contain 2 fatty acids attached to a glycerol backbone.
An additional phosphate polar group bonds to the molecule and creates a polar end of the molecule.
The 2 long chain fatty acids that are a part of the phospholipid can be of either variety - saturated or
unsaturated fatty acids - ✔✔True
Which one is a fat storage molecule? - ✔✔Triglyeride
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