HLTH 642 Quiz Carbohydrates Answered Fall 2025 Score for this quiz: 64 out of 70

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HLTH 642 Quiz Carbohydrates. 70 Score for this quiz: 64 out of 70 Question 1 2 / 2 pts By what mechanism do soluble fibers decrease the absorption of lipids? by increasing growth of bacteria that u... se the lipids by lowering blood cholesterol by adsorbing/interacting with lipids by reducing mineral absorption Question 2 2 / 2 pts What is the most common digestible homopolysaccharide existing as both amylose and amylopectin? glycogen cellulose hemicellulose starch Question 3 0 / 2 pts The health benefits of fiber are based on which two characteristics? You Answered viscosity and solubility Correct Answer viscosity and fermentability fermentability and solubility solubility and stability Question 4 2 / 2 pts People with type 1 diabetes have ____. slow translocation of GLUT4 receptors from the Golgi body lack of mRNA synthesis for GLUT4 receptors in adipocytes or myocytes increased glycogenesis in myocytes after a meal below-normal glucokinase activity because of low insulin levels Question 5 2 / 2 pts Which of the following high-fiber foods are most effective in lowering serum cholesterol? corn and wheat chitosan and chitin rice bran and wheat bran oat bran Question 6 2 / 2 pts Which of the following is considered a functional fiber? hemicellulose fructans psyllium lignin Question 7 2 / 2 pts Ingesting foods rich in gel-forming fibers is associated with ____. increased nutrient digestion increased convective movement of nutrients increased gastric distention increased nutrient diffusion rates Question 8 2 / 2 pts Which plant polysaccharides have a structure similar to gums? mucilages fructans β-glucans pectins Question 9 2 / 2 pts What are the major dietary energy sources that are composed of two simple sugars? disaccharides polysaccharides monosaccharides trioses Question 10 2 / 2 pts Pectins are part of the cell wall and middle lamella and are not ____. water soluble gel forming stable at acidic pHs stable at basic pHs Question 11 2 / 2 pts What are the hydrocolloids that are secreted at a site of injury on a plant or surround the endosperm of some seeds and that are used as thickening agents? lignin cellulose pectins gums Question 12 2 / 2 pts A good choice of a food to add to one’s diet in an effort to increase fiber intake while not consuming large portions is ____. watermelon almonds grapes white rice Question 13 2 / 2 pts Phenolic acids are found in ____. grapes, grape juice, red wine, and strawberries cruciferous vegetables meat and dairy tomatoes, pumpkins, squash, and carrots Question 14 0 / 2 pts The glucose transporter that is sensitive to insulin is ____. GLUT1 You Answered GLUT2 Correct Answer GLUT4 SGLT1 Question 15 0 / 2 pts What are plant polysaccharides found in flax and psyllium that are effective in reducing serum LDL cholesterol? You Answered beta-glucans fructans Correct Answer mucilages chitin Question 16 2 / 2 pts Which source of fiber would be the best to add to one’s diet in order to lower serum lipid concentrations? barley β-glucan and methylcellulose wheat dextrin pectin guar gum Question 17 2 / 2 pts Hemicelluloses with acids in their side chains are more soluble in ____. acids water oils alcohols Question 18 2 / 2 pts Fiber fermentation in the colon may change glycogen catabolism due to the production of ____. long-chain fatty acids chitosan oligosaccharides short-chain fatty acids Question 19 2 / 2 pts A high-molecular-weight substance made up of a repeating chain is the definition of a(n) ____. polymer monomer isomer disaccharide Question 20 2 / 2 pts Ice cream with added gums will appear to be ____. sweeter thinner creamier lighter Question 21 2 / 2 pts The enzyme needed to hydrolyze the α (1,6) bond of amylopectin is ____, which is secreted by the ____. amylase; enterocyte sucrose; pancreas lactase; enterocyte isomaltase; enterocyte Question 22 2 / 2 pts β-glucans are found in ____. oat products and barley citrus fruits, strawberries, and apples chicory, asparagus, and onions bran, nuts, and legumes Question 23 2 / 2 pts The purpose of the hexose monophosphate shunt is to produce ____. pentose phosphates and NADPH DNA and RNA fatty acids reducing substrates Question 24 2 / 2 pts Choose the best description of the main method of glucose absorption. passive diffusion down a concentration gradient active transport with fructose facilitated transport active transport with sodium Question 25 2 / 2 pts Enterocytes absorb only one form of carbohydrate. This form is ____. disaccharides polysaccharides monosaccharides trisaccharides Question 26 2 / 2 pts The majority of energy in the typical American diet comes from ____. fat protein carbohydrate vitamins Question 27 2 / 2 pts Starches in the duodenum and jejunum are acted upon by ____. β-amylase lipase sucrase α-amylase Question 28 2 / 2 pts Alcohol in beverages is degraded mainly in the liver cytosol with the production of one NADH for each ethanol molecule. Predict what effect consumption of alcohol would have on the activity of the liver malate-aspartate shuttle. no change increased decreased reversed Question 29 2 / 2 pts A manufacturer can claim that its product is an “excellent” source of fiber if the product contains at least what percentage of recommendations? 5 10 15 20 Question 30 2 / 2 pts Which type of food does not contain cellulose purified from wood? canned green beans cake mixes sandwich spreads fruit juice mixes Question 31 2 / 2 pts Most fibers are strongly ____. hydrophobic allosteric hydromorphic hydrophilic Question 32 2 / 2 pts What is a water-soluble, gel-forming fiber that functions in the plant as intracellular cement and that is used commercially to make jellies and to provide fiber in enteral formulas? lignin gum pectin cellulose Question 33 2 / 2 pts Cellulose is a polymer of glucose where the monomers are connected by β-linkages. Humans cannot digest this substance because ____. they only produce α-amylase they produce insufficient quantities of β-amylase cellulose is resistant to the human form of β-amylase the β-linkages are too strong to be hydrolyzed Question 34 2 / 2 pts In the complete oxidation of 1 mol of glucose, how many ATPs are formed? 4–6 8–12 18–24 30–32 Question 35 2 / 2 pts In order to be absorbed by the body, all digestible carbohydrates must be broken down into ____. disaccharides monosaccharides trisaccharides oligosaccharides Quiz Score: 64 out of 70 [Show More]

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