1.Why do fat molecules can pack closely together? a. "bends" b. polarity c. length d. linearity
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1.Why do fat molecules can pack closely together?
- a. "bends"
- b. polarity
- c. length
- d. linearity
2. Which one is NOT a property of glycerol?
- a. "backbone" in the simple lipid structure
- b. undergoes condensation with three molecules of fatty acids
- c. its OH groups reacts with the fatty functional groups of fatty acids
- d. it is a water-soluble ester
3. Which one has to bends in the structure?
- a. palmitic acid
- b. oleic acid
- c. linoleic acid
- d. myristic acid
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- 1. Which of the following is a structural component of a triacylglycerol? a. fatty acids b. glycerol c. both a and b d. neither a nor b 2. Which is TRUE regarding fatty acids? a. It contains a polar hydrocarbon chain. b. It is a component of oils and fats. c. both a and b d. neither a nor b 3. What happens in the stomach during lipid digestion? a. formation of micelles b. hydrolysis of lipids by salivary lipase c. both a and b d. neither a nor b 4. Which process does NOT happen in the small intestine during lipid digestion? a. secretion of bile salts b. formation of micelles c. absorption of long-chain fatty acids by the enterocytes d. a, b, and c are the correct answer. 5. Which of the following describes the enzymatic activity of pancreatic lipase? a. It hydrolyzes the bond between the fatty acids and glycerol. b. It emulsifies the lipid droplet into smaller globules. c. both a and b d. neither a nor b 6. What is the correct sequence of events during lipid digestion? I.…1. Which one is NOT a property of glycerol? a. "backbone" in the simple lipid structure b. undergoes condensation with three molecules of fatty acids c. its OH groups reacts with the fatty functional groups of fatty acids d. it is a water-soluble ester 2. Which one has to bends in the structure? a. palmitic acid b. oleic acid c. linoleic acid d. myristic acid1. Unsaturated Fats a. have fewer fatty acid molecules per fat molecule than saturated fats. b. are more common in animals than in plants c. are usually solid at room temperature d. have double bonds in the carbon chains of their fatty acids e. are excluded from the lipid bilayer because they are hydrophilic. help with the following, thanks
- How is the structure of saturated fats different from that of unsaturated fats? A. All of the carbons in the hydrocarbon tails of saturated fats are bonded to one another with double bonds. B. Saturated fats have three hydrocarbon tails bonded to the glycerol molecule instead of just two. C. The hydrocarbon tails in a saturated fat have the maximum number of hydrogens possible. D. Saturated fats have no oxygens present. What are the primary functions of carbohydrates in cells? A. Energy storage, cell identity, structure, and building blocks for synthesis. B. Catalysis, structure, and energy storage. C. Different orientation of a hydroxyl in the ring form. D. Different position of the carbonyl group in the linear form. A positive test for starch would give the following colors: A. Dark blue, black, or purple B. Red, yellow, orange-red, green C. Bright Purple D. Purely BlueAlthough the first two carbons of fructose and glucose are identical in structure to DHAP and GADP (from glycolysis), DHAP and GADP equilibriate on their in solution to favor the ketone over the aldehyde, while fructose and glucose do not. Why? a)The larger size of the molecule sterically hinders the isomerization b)The larger sugars have more OH groups which hydrogen bond and disrupt isomerization c)The larger sugars cyclize, and there is no carbonyl to isomerize in the cyclic form d)The larger sugars cyclize, and in the cyclic form the hydrogen bonding is very strong e)The larger sugars are less soluble in water than the smaller sugars1. What biological molecule are required in the synthesis of protein( choose all that apply)? - phosphate ester - fatty acid (s) - alcohol - glycerol - amino acids 2. ATP is generated during A. Aldehyde reduction B. Alkene hydration C. Acetal synthesis D. Polysaccharide hydrolysis 3. What compound( biological classification) would be the result of protein complete hydrolysis in the mouth? A. Fatty acid and glycerol B. Monosaccharides C. Amino acids D. Disaccharide 4. The hydrophobic/ hydrophilic interaction are present in which protein structure level (s) (choose all that apply) ? - secondary - primary - tertiary -quaternary 5. Which protein structural level is/ are affected by the addition of an organic solvent isopropanol? A. Secondary B. Tertiary C. All are affected D. Quaternary
- 1. Which of the following best describes glycogen? A. a fibrous protein that helps in maintaining cellular structure B. a storage polysaccharide found in plants C. has alpha 1-6 glyosidic bonds. D. is formed by the hydrolysis of glucose molecules. 2. Which part of an amino acid gives it its unique identity? A. the long carbon-hydrogen tails of the molecule B. the carboxyl and amino groups C. the components of its side chain D. the glycerol molecule that forms the backbone of the amino acidThe surface of the eye is wet by tears, and to minimize evaporation, the tear layer is coated with lipids. One of these lipids is built from oleic acid and a 32-carbon fatty acid that has a double bond between carbons 9 and 10 and a hydroxyl group attached to the omega carbon. The carboxyl group of oleic acid condenses with the hydroxyl group in the longer lipid. Draw the structure of the reaction product. It’s OK to draw a condensed structure.1. Which one is classified as signaling lipid a. TAG b. Cholesterol c. Bile d. Eicosanoids 2. Which on is compound lipid? a. phospholipids b. coconut oil c. lard d. beeswax 3. What is the functional group in fatty acid structure? a. palmitic acid b. oleic acid c. linoleic acid d. myristic acid
- 1. Phospholipids have ____ fatty acids while triglycerides _____ fatty acids. A. one and two B. three and two C. two and one D. two and three 2. Which one of the following is / are function (s) of lipids? A. Insulation B. Cell membrane structure C. Energy storage D. All of the above 3. The term polyunsaturated fatty acid refers to ____ A. A fatty acid in which all carbons are bonded to hydrogens (only single bonds) B. A fatty acid in which more than one double bond exists C. A fatty acid in which only one double bond exists D. None of the above 4. Cholesterol is an example of a __________ A. Phospholipid B. Triglyceride C. Sterol D. Diglyceride 5. What is the role of bile acids? A. Digestion of fat to diglyceride and two fatty acids B. Digestion of fat to monoglyceride and two fatty acids C. Transportation of fats through the blood D. Emulsification of fatsWhy can a monosaccharide theoretically form diverse disaccharides? a. Because it is classified as an aldose or ketoseb. Because it is a right-handed moleculec. Because it has multiple hydroxyl groups that can form glycosidic bond.d. Because it has several carbonyl groups that can form glycosidic bond.Fatty acids in phospholipids and triacylglycerols interact with one another by (a) disulfide bridges (b) van der Waals interactions (c) covalent bonds (d) hydrogen bonds (e) fatty acids do not interact with one another
