Concept explainers
The enzyme amylase accelerate s the reaction of changing
a. polysaccharides into monosaccharides.
b. disaccharides into monosaccharides.
c. starch into disaccharides.
d. disaccharides into glucose.
Introduction:
Enzymes are biological catalysts that modify or speed up a specific chemical reaction. Digestion also involves many enzymatic reactions. One such reaction occurring during digestion of carbohydrate, involves the enzyme salivary amylase. Salivary amylase is secreted in the mouth and it accelerates the conversion of polysaccharides (starch) into disaccharides (sugar).
Answer to Problem 1PL
Correct answer:
The correct answer is option (c) starch into disaccharides.
Explanation of Solution
Explanation/justification for the correct answer:
Option (c) starch into disaccharides is the correct answer. Salivary amylase is a digestive enzyme that acts on starch which is a complex carbohydrate and hydrolyzes it into sugar which is a disaccharide. So, the correct answer is option (c).
Explanation for incorrect answer:
Option (a) polysaccharides into monosaccharides. Polysaccharides are first converted into disaccharides by amylase and then into monosaccharides by an intestinal enzyme called maltase. Amylase enzyme does not change polysaccharides directly into monosaccharides. So, this is an incorrect option.
Option (b) disaccharides into monosaccharides.Amylase enzyme accelerates conversion of polysaccharides into disaccharides and not disaccharides into monosaccharides. Disaccharides are changed into monosaccharides by an intestinal enzyme called maltase. So, this is an incorrect answer.
Option (d) disaccharides into glucose.Disaccharides are changed into glucose which is a monosaccharide by intestinal enzyme called maltase and not by amylase. So, this is an incorrect answer.
Want to see more full solutions like this?
Chapter 55 Solutions
Laboratory Manual For Human Anatomy & Physiology
- In the digestion of Carbohydrates, the more complex carbohydrate molecules are broken down into smaller molecules such as the Monosaccharides. This breakdown of complex carbohydrate into simple sugars is an example of: a. Catabollism b. Anabolismarrow_forwardCatalase, sucrase, lactase are examples of... A. simple sugars B. nitrogen bases C. enzymes D. lipidsarrow_forwardWhich of the statements about carbohydrates is INCORRECT? A. Carbohydrates are hydrates of carbon. B. Carbohydrates exist in the linear or cyclic forms. C. Carbohydrates are polymers of monosaccharides linked by ether bonds. D. Carbohydrates are polymers of polyhydroxy aldehydes or ketones. E. Carbohydrates are polymers of the same type of monosaccharide or at least 2 different types of monosaccharide units.arrow_forward
- Which of the following is/are epimer/s of glucose?* A. Galactose only B. Mannose only C. Fructose only D. Galactose and mannose only E. Galactose, mannose, and fructosearrow_forwardA student performed Benedict’s test on fructose, maltose, lactose, and sucrose to determine if they are reducing or non-reducing sugars. a. Draw out the products of those carbohydrates/sugars that can be oxidized and explain why those sugars are so easily oxidized. Please provide only those sugars that are reducing sugars.arrow_forwardWhich of the following polysaccharides cannot be cleaved with ?α-amylase, a glycosidase that catalyzes the hydrolysis of ?α 1-4 glycosidic bonds. Select all that apply a. Amylopectin b. Glycogen c. Chitin d. Cellulose e. Amylosearrow_forward
- Which of the following statements best describes glucose? a. It is an aldohexose. b. It is produced from dietary starch by the action of α-amylase. c. It is utilized in biological systems only in the L-isomeric form. d. It is a disaccharide.arrow_forwardBoiling rigatoni noodles (wheat flour noodles) in water results in: a. the Maillard reaction b. epolymerization of gluten into gliadin and glutenin c. lowering the pH of the water to pH 2.0 d. forcing the starch in flour to hydrogen bond to water e. hydrolysis of ATP to form ADP + Piarrow_forwardMonosaccharides includes all the following, except a. Glucose O b. Fructose c. Galactose O d. Lactosearrow_forward
- The polysaccharide found in plant cell walls isa. glucose.b. starch.c. maltose.d. cellulose.arrow_forwardA monosaccharide belonging to ketoses is O a. D-Xylose O b. D- ribose O C. All of the three molecules O d. D-Fructosearrow_forwardWhich of the following is false about carbohydrates? a. they serve as supportive structure; and protective components in the cell walls of the bacteria and plants b. they are essential components of the genetic material c. they can act as ligands and receptors in cellular communication d. they are generally non-polar and supply the body with fat-soluble vitaminsarrow_forward
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education