Digestion - PhysioEx

Boiling denatured the enzyme, but freezing had no effect.

Which of the following describes the effect of boiling and freezing? Boiling and freezing both denatured amylase. 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.

Substrate is present.

What does a strong IKI result indicate? Product of the reaction is present. Amylase is working. Amylase activity is optimal. Substrate is present.

is detected using Benedict's reagent

The presence of reducing sugars _______. is detected using Benedict's reagent means that amylase has been denatured means that the substrate is present is detected using IKI

tubes 7 and 8

Which tubes demonstrated amylase activity with a small amount of reducing sugar produced? tubes 7 and 8 tubes 5 and 6 tubes 1 and 2 tubes 3 and 4

made of protein and are catalysts

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

substrate

The substance that the enzyme acts on is called its _______. product subunit monomer substrate

both the salivary glands and the pancreas

Amylase is secreted by _______. the stomach the small intestine both the salivary glands and the pancreas the salivary glands the pancrease

disaccharide

Maltose is a _______. complex carbohydrate disaccharide type of starch monosaccharide

enzyme/substrate specificity

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

All are matched correctly.

Which of the following enzyme/substrate combinations is matched INCORRECTLY? peptides - peptidase starch - amylase cellulose - cellulase All are matched correctly.

bacteria

The cellulase in this experiment came from _______. fungi a plant an animal bacteria

Amylase does not digest cellulose.

What did the results of tube 3 demonstrate? Peptidase digests peptides. Amylase does not digest cellulose. Cellulose is a substrate of amylase. The amylase contained contaminating cellulase.

reddish brown

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

starch and cellulose

IKI is used to test for the presence of _______. cellulose starch and cellulose starch and protein protein starch

hydrogen and ionic bonds

Substrates are held in the active site by _______. hydrogen and covalent bonds ionic bonds covalent bonds hydrogen bonds hydrogen and ionic bonds

They are linked differently.

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

It was inactivated.

What occurred when pepsin was boiled? It was inactivated. The enzyme didn't work because the incubation temperature was too high. The enzyme didn't work because the pH was too low. Its activity increased.

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

Pepsin is _______. a peptidase, an enzyme that digests protein and a protein that digests protein a peptidase and an enzyme that digests protein a protein that digests protein a peptidase an enzyme that digests protein

tubes 2, 5, and 6

Which test tubes were used to determine the optimal pH for pepsin activity? tubes 2, 3, and 4 tubes 2, 5, and 6 tubes 4, 5, and 6 tubes 1, 2, and 3

2

The optimal pH for pepsin activity is _______. The activity was the same at a pH of 2, 7 and 9. 7 9 2

amino acids

The building blocks for peptides are _______. maltose nucleic and amino acids glucose amino acids nucleic acids

chief cells

Pepsin is secreted by _______. chief cells goblet cells salivary glands acinar cells

an enzyme and a peptidase

Pepsin is classified as _______. a substrate an enzyme and a substrate an enzyme and a peptidase a peptidase an enzyme

changes from colorless to yellow

When BAPNA is hydrolyzed, it _______. changes from colorless to yellow produces reducing sugar complexes with starch changes from yellow in color to colorless

tubes 1, 5, and 6

Which test tubes were used to determine the optimal pH for lipase activity? tubes 1, 5, and 6 tubes 2, 3, and 4 tubes 1, 2, and 3 tubes 2, 5, and 6

tube 1

Which test tube had the highest lipase activity? tube 4 tube 3 tube 1 tube 2

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

Why is gastric lipase NOT as active as pancreatic lipase? The pH of the stomach is too high and no bile is present in the stomach. No bile is present in the stomach. The pH of the stomach is too high. The pH of the stomach is too low and no bile is present in the stomach. The pH of the stomach is too low.

triglyceride

The substrate of lipase is _______. bile fatty acids monoglyceride triglyceride

All of the above are true.

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

increases the surface area of the triglycerides

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

the small intestine

Which of following does NOT secrete a lipase? the small intestine the salivary glands the stomach the pancreas

more basic

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

Digestion - PhysioEx - Subjecto.com

Digestion – PhysioEx

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Boiling denatured the enzyme, but freezing had no effect.

Which of the following describes the effect of boiling and freezing? Boiling and freezing both denatured amylase. 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.

Substrate is present.

What does a strong IKI result indicate? Product of the reaction is present. Amylase is working. Amylase activity is optimal. Substrate is present.

is detected using Benedict’s reagent

The presence of reducing sugars _______. is detected using Benedict’s reagent means that amylase has been denatured means that the substrate is present is detected using IKI

tubes 7 and 8

Which tubes demonstrated amylase activity with a small amount of reducing sugar produced? tubes 7 and 8 tubes 5 and 6 tubes 1 and 2 tubes 3 and 4

made of protein and are catalysts

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

substrate

The substance that the enzyme acts on is called its _______. product subunit monomer substrate

both the salivary glands and the pancreas

Amylase is secreted by _______. the stomach the small intestine both the salivary glands and the pancreas the salivary glands the pancrease

disaccharide

Maltose is a _______. complex carbohydrate disaccharide type of starch monosaccharide

enzyme/substrate specificity

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

All are matched correctly.

Which of the following enzyme/substrate combinations is matched INCORRECTLY? peptides – peptidase starch – amylase cellulose – cellulase All are matched correctly.

bacteria

The cellulase in this experiment came from _______. fungi a plant an animal bacteria

Amylase does not digest cellulose.

What did the results of tube 3 demonstrate? Peptidase digests peptides. Amylase does not digest cellulose. Cellulose is a substrate of amylase. The amylase contained contaminating cellulase.

reddish brown

When using the Benedict’s assay, which color would indicate the most reducing sugar present? reddish brown green orange blue

starch and cellulose

IKI is used to test for the presence of _______. cellulose starch and cellulose starch and protein protein starch

hydrogen and ionic bonds

Substrates are held in the active site by _______. hydrogen and covalent bonds ionic bonds covalent bonds hydrogen bonds hydrogen and ionic bonds

They are linked differently.

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

It was inactivated.

What occurred when pepsin was boiled? It was inactivated. The enzyme didn’t work because the incubation temperature was too high. The enzyme didn’t work because the pH was too low. Its activity increased.

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

Pepsin is _______. a peptidase, an enzyme that digests protein and a protein that digests protein a peptidase and an enzyme that digests protein a protein that digests protein a peptidase an enzyme that digests protein

tubes 2, 5, and 6

Which test tubes were used to determine the optimal pH for pepsin activity? tubes 2, 3, and 4 tubes 2, 5, and 6 tubes 4, 5, and 6 tubes 1, 2, and 3

2

The optimal pH for pepsin activity is _______. The activity was the same at a pH of 2, 7 and 9. 7 9 2

amino acids

The building blocks for peptides are _______. maltose nucleic and amino acids glucose amino acids nucleic acids

chief cells

Pepsin is secreted by _______. chief cells goblet cells salivary glands acinar cells

an enzyme and a peptidase

Pepsin is classified as _______. a substrate an enzyme and a substrate an enzyme and a peptidase a peptidase an enzyme

changes from colorless to yellow

When BAPNA is hydrolyzed, it _______. changes from colorless to yellow produces reducing sugar complexes with starch changes from yellow in color to colorless

tubes 1, 5, and 6

Which test tubes were used to determine the optimal pH for lipase activity? tubes 1, 5, and 6 tubes 2, 3, and 4 tubes 1, 2, and 3 tubes 2, 5, and 6

tube 1

Which test tube had the highest lipase activity? tube 4 tube 3 tube 1 tube 2

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

Why is gastric lipase NOT as active as pancreatic lipase? The pH of the stomach is too high and no bile is present in the stomach. No bile is present in the stomach. The pH of the stomach is too high. The pH of the stomach is too low and no bile is present in the stomach. The pH of the stomach is too low.

triglyceride

The substrate of lipase is _______. bile fatty acids monoglyceride triglyceride

All of the above are true.

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

increases the surface area of the triglycerides

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

the small intestine

Which of following does NOT secrete a lipase? the small intestine the salivary glands the stomach the pancreas

more basic

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

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