Exp. 3_Post Lab Flashcards

1
Q

an enzyme that hydrolyzes peptide bonds to amino acids, cleaving peptide bonds between hydrophobic and aromatic amino acids

A

Pepsin

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2
Q

Pepsin is only active in a ______ environment

A

Acidic

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3
Q

Pepsin is active in acidic environment, having an optimum pH of

A

1.5-2.0

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4
Q

Proenzyme________ is released by the chief cells in the stomach wall.

A

pepsinogen

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5
Q

Amylase in saliva with optimum pH of

A

6.7-7.0

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6
Q

an enzyme that hydrolyzes α-1,4-glycosidic bonds in starch producing oligosaccharides, maltose or glucose or dextrin depending on the time spent in the mouth of the food

A

Amylase

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7
Q

Amylase is an enzyme that hydrolyzes___________ in starch producing oligosaccharides, maltose or glucose or dextrin depending on the time spent in the mouth of the food

A

α-1,4-glycosidic bonds

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8
Q

In pepsin test: _____ reacts with starch forming a blue-black solution

A

Iodine

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9
Q

an enzyme that protects organisms from the effects of hydrogen peroxide

A

Catalase

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10
Q

is a powerful oxidizing agent and is potentially damaging to cells

A

H2O2

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11
Q

breaks down hydrogen peroxide into water and oxygen gas

A

Catalase

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12
Q

Potato catalase - enzyme found in potato, optimum pH =

A

7.0

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13
Q

is active with the presence of acid thus catalysis the breaking down of proteins into amino acids.

A

Pepsin

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14
Q

hydrolyses glycosidic bonds of carbohydrates turning them to oligosaccharides or dextrins.

A

Amylase

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15
Q

In amylase reaction

A
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16
Q

In amylase reaction: If reddish-purple color appears,______ is present

A

dextrin

17
Q

In amylase reaction: If reddish-brown color appears,______is present

A

glycogen

18
Q

breaks down hydrogen peroxide into oxygen and water.

A

Catalase