Chemical and Physical Processes of Digestion Ex 8 Act. 1, 2, 3 and 4 PDF

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Chemical and Physical Processes of Digestion Ex 8 Act. 1, 2, 3 and 4...

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3/23/2021

Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4 Due: 11:59pm on Tuesday, March 23, 2021 You will receive no credit for items you complete after the assignment is due. Grading Policy

PhysioEx Exercise 8 > Activity 1: Overview and Pre-lab Quiz for Assessing Starch Digestion by Salivary Amylase Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 8 > Activity 1: Assessing Starch Digestion by Salivary Amylase

Part A Enzymes are _______. ANSWER:

made of protein made of protein and are catalysts are catalysts made of protein, are catalysts, and permanently changed by the substrate permanently changed by the substrate

Correct

Part B The substance that the enzyme acts on is called its _______. ANSWER:

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

monomer substrate subunit product

Correct

Part C Amylase is secreted by _______. ANSWER:

the small intestine the pancrease the stomach the salivary glands both the salivary glands and the pancreas

Correct

Part D Maltose is a _______. ANSWER:

complex carbohydrate monosaccharide disaccharide type of starch

Correct

PhysioEx Exercise 8 > Activity 1: Activity and Post-lab Quiz for Assessing Starch Digestion by Salivary Amylase

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Click on the link or the image below to launch Exercise 8 > Activity 1: Assessing Starch Digestion by Salivary Amylase. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 8 > Activity 1: Assessing Starch Digestion by Salivary Amylase

Part A Which of the following describes the effect of boiling and freezing? ANSWER:

Boiling and freezing had no effect on amylase. Boiling denatured the enzyme, but freezing had no effect. Freezing denatured the enzyme, but boiling had no effect. Boiling and freezing both denatured amylase.

Correct

Part B What does a strong IKI result indicate? ANSWER:

Product of the reaction is present. Substrate is present. Amylase is working. Amylase activity is optimal.

Correct

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Part C The presence of reducing sugars _______. ANSWER:

means that the substrate is present means that amylase has been denatured is detected using Benedict's reagent is detected using IKI

Correct

Part D Which tubes demonstrated amylase activity with a small amount of reducing sugar produced? ANSWER:

tubes 1 and 2 tubes 3 and 4 tubes 7 and 8 tubes 5 and 6

Correct

PhysioEx Exercise 8 > Activity 2: Overview and Pre-lab Quiz for Exploring Amylase Substrate Specificity Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 8 > Activity 2: Exploring Amylase Substrate Specificity

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Part A When using the Benedict's assay, which color would indicate the most reducing sugar present? ANSWER: orange reddish brown blue green

Correct

Part B IKI is used to test for the presence of _______. ANSWER:

starch cellulose protein maltose

Correct

Part C Substrates are held in the active site by _______. https://session.masteringaandp.com/myct/assignmentPrintView?assignmentID=7835832

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

ANSWER: covalent bonds ionic bonds hydrogen and covalent bonds hydrogen bonds hydrogen and ionic bonds

Correct

Part D What is the difference between cellulose and starch? ANSWER:

They are in different locations in the animal cell. They are linked differently. Cellulose is a polysaccharide, but starch is not. Starch is a polysaccharide, but cellulose is not.

Correct

PhysioEx Exercise 8 > Activity 2: Activity and Post-lab Quiz for Exploring Amylase Substrate Specificity Click on the link or the image below to launch Exercise 8 > Activity 2: Exploring Amylase Substrate Specificity. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 8 > Activity 2: Exploring Amylase Substrate Specificity

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Part A The purpose of this activity was to look at the effect of _______. ANSWER: enzyme/substrate specificity pH on enzyme activity salt concentration on enzyme activity temperature on enzyme activity

Correct

Part B Which of the following enzyme/substrate combinations is matched INCORRECTLY? ANSWER:

peptides - peptidase starch - amylase cellulose - cellulase All are matched correctly.

Correct

Part C The cellulase in this experiment came from _______. https://session.masteringaandp.com/myct/assignmentPrintView?assignmentID=7835832

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

ANSWER: bacteria an animal fungi a plant

Correct

Part D What did the results of tube 3 demonstrate? ANSWER:

The amylase contained contaminating cellulase. Amylase does not digest cellulose. Cellulose is a substrate of amylase. Peptidase digests peptides.

Correct

PhysioEx Exercise 8 > Activity 3: Overview and Pre-lab Quiz for Assessing Pepsin Digestion of Protein Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 8 > Activity 3: Assessing Pepsin Digestion of Protein

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Part A The building blocks for peptides are _______. ANSWER:

nucleic and amino acids nucleic acids maltose glucose amino acids

Correct

Part B Pepsin is secreted by _______. ANSWER:

goblet cells acinar cells salivary glands chief cells

Correct

Part C Pepsin is classified as _______. ANSWER:

an enzyme and a substrate a peptidase an enzyme and a peptidase a substrate an enzyme

Correct https://session.masteringaandp.com/myct/assignmentPrintView?assignmentID=7835832

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Part D When BAPNA is hydrolyzed, it _______. ANSWER:

produces reducing sugar changes from colorless to yellow changes from yellow in color to colorless complexes with starch

Correct

PhysioEx Exercise 8 > Activity 3: Activity and Post-lab Quiz for Assessing Pepsin Digestion of Protein Click on the link or the image below to launch Exercise 8 > Activity 3: Assessing Pepsin Digestion of Protein. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 8 > Activity 3: Assessing Pepsin Digestion of Protein

Part A What occurred when pepsin was boiled? ANSWER:

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

The enzyme didn't work because the pH was too low. It was inactivated. The enzyme didn't work because the incubation temperature was too high. Its activity increased.

Correct

Part B Pepsin is _______. ANSWER:

an enzyme that digests protein a protein that digests protein a peptidase, an enzyme that digests protein and a protein that digests protein a peptidase a peptidase and an enzyme that digests protein

Correct

Part C Which test tubes were used to determine the optimal pH for pepsin activity? ANSWER:

tubes 4, 5, and 6 tubes 2, 5, and 6 tubes 1, 2, and 3 tubes 2, 3, and 4

Correct

Part D The optimal pH for pepsin activity is _______. ANSWER:

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

2 The activity was the same at a pH of 2, 7 and 9. 9 7

Correct

PhysioEx Exercise 8 > Activity 4: Overview and Pre-lab Quiz for Assessing Lipase Digestion of Fat Read the introduction and then answer the Pre-lab Quiz questions to the right. Exercise 8 > Activity 4: Assessing Lipase Digestion of Fat

Part A Triglycerides _______. ANSWER:

dissolve poorly in water are lipids are digested by lipase are fats All of the above are true.

Correct

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

Part B Adding bile to triglycerides _______. ANSWER:

causes them to clump digests triglycerides into monoglyceride and two fatty acids increases the surface area of the triglycerides chemically modifies the triglycerides

Correct

Part C Which of following does NOT secrete a lipase? ANSWER:

the pancreas the stomach the small intestine the salivary glands

Correct

Part D Prior to lipase digestion of triglycerides, the solution would be _______. ANSWER: more acidic and less alkaline more basic less alkaline more acidic

Correct

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

PhysioEx Exercise 8 > Activity 4: Activity and Post-lab Quiz for Assessing Lipase Digestion of Fat Click on the link or the image below to launch Exercise 8 > Activity 4: Assessing Lipase Digestion of Fat. Complete the Experiment and then answer the Post-lab Quiz questions to the right. Exercise 8 > Activity 4: Assessing Lipase Digestion of Fat

Part A Which test tubes were used to determine the optimal pH for lipase activity? ANSWER:

tubes 1, 2, and 3 tubes 2, 3, and 4 tubes 1, 5, and 6 tubes 2, 5, and 6

Correct

Part B Which test tube had the highest lipase activity? ANSWER:

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Chemical and Physical Processes of Digestion Ex 8: Act. 1, 2, 3 and 4

tube 2 tube 4 tube 3 tube 1

Correct

Part C Why is gastric lipase NOT as active as pancreatic lipase? ANSWER:

The pH of the stomach is too high and no bile is present in the stomach. The pH of the stomach is too low. The pH of the stomach is too low and no bile is present in the stomach. No bile is present in the stomach. The pH of the stomach is too high.

Correct

Part D The substrate of lipase is _______. ANSWER:

fatty acids triglyceride monoglyceride bile

Correct

Score Summary: Your score on this assignment is 100%. You received 4 out of a possible total of 4 points.

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