Which statement is NOT true? A) Lipids are found in cell membranes. B) Oxidation
ID: 500888 • Letter: W
Question
Which statement is NOT true? A) Lipids are found in cell membranes. B) Oxidation of lipids provides half as much energy as oxidation of carbohydrates. C) Some hormones are lipids. D) Lipids are soluble in organic solvents. E) Lipids vary in composition. Which of the following is NOT a function of lipids in the human body? A) insulation B) pH regulation C). protection D) emulsification E) energy storage Choose the polyunsaturated fatty acid from the compounds below. Which of the following lipids will give no fatty add when hydrolyzed? A) wax B) cholesterol C). fat D) phospholipid E) glycolipid Unsaturated fatty acids have lower melting points than saturated fatty adds because? A) the cis double bonds give them an irregular shape. B) they have more hydrogen atoms. C). they have fewer hydrogen atoms. D) the trans double bonds give them an irregular shape. E) their molecules fit closely together.Explanation / Answer
Answer 1: Lipids are major source of energy but that is produced by metabolism of lipids not by oxidation of lipids.
Phospholipid bilayer is important component of cell membrane.
Sterol lipids or steroids have different biological roles as hormones and signaling molecules
Lipids long chain of alkyl group which highly soluble in organic solvent
There are various kind of lipids like fatty acid, glycerolipid, glycerophospholipids etc
Answer 2: pH regulation
Lipids provides insulation and protection to organs and major source of energy. lipids form emulsion with the help of bile. Only remaining is pH regulation which is not a function of Lipids.
Answer 3: A) which has 2 double bond and a carboxylic acid
B) is alkene C) is aldehyde D) & E are alcohol
Answer 4: Cholesterol has alcohol group only
Wax, Fat, phospholipids and glycolipids has ester group present which will hydrolyze to fatty acid
Answer 5: Cis double bond gives them an irregular shape
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