BioChemistry > EXAM > Biochem 2: Exam 1 Mastery Questions AND COMPLETE SOLUTIONS (All)

Biochem 2: Exam 1 Mastery Questions AND COMPLETE SOLUTIONS

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Saturated fatty acids are different to unsaturated fatty acids because they: A. have an even number of carbon atoms B. have short hydrophobic tails C. have no C=C double bonds D. exhibit f... ree rotation about the carbon carbon bonds in the hydrocarbon tail E. mostly have cis double bonds Correct Answer: C. have no C=C double bonds Which of the following statements is FALSE? A. The longer the chain length of a saturated fatty acid, the higher the melting temperature B. The difference in melting temperature between a saturated fatty acid and an unsaturated fatty acid with the same chain length is only a few degrees Celsius. C. Most types of fat in many animals is used in energy production D. Some unsaturated fatty acids are liquid at physiological temperatures E. Fatty acids exist in the anionic form (RCOO-) at physiological pH Correct Answer: B. The difference in melting temperature between a saturated fatty acid and an unsaturated fatty acid with the same chain length is only a few degrees Celsius. Explanation: Unsaturated fatty acids tend to be more liquid because they cannot be packed as tightly as saturated fatty acids. Which of the following lipids can be a major component of biological membranes? A. Phosphatic acid B. Phosphatidylcholine C. Phosphatidylinositol D. Cholesterol E. B and D. Correct Answer: E. B and D Spingomyelin contains a fatty acid linked by an _________ bond and phosphocholine linked via the C-3 hydroxyl group of sphingosine. Correct Answer: Amide Which of the following is unlikely to be a characteristic of a membrane protein? A. Largely hydrophobic transmembrane se [Show More]

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