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PHA6112 LAB S2(Carbohydrates)

Authored by Severus Snape

Health Sciences

University

Used 1+ times

PHA6112 LAB S2(Carbohydrates)
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9 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following words/phrases makes the statement FALSE?

Carbohydrates are the most important sources of energy. They are widely distributed in animals and also found in certain tissues such as liver and muscles.

Most important sources of energy

Widely distributed in animals

Liver

Muscles

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following words/phrases makes the statement FALSE?

We can utilize the proteins even if we do not have carbohydrates. They also come in the form of dietary fibers.

can

Do not have carbohydrates

Dietary Fibers

Proteins

3.

MATCH QUESTION

1 min • 1 pt

Match the following

Monosaccharides

Simple sugar that cannot be hydrolyzed

Polysaccharides

More than 10 monosaccharide units

Oligosaccharides

2-10 monosaccharide units

4.

CATEGORIZE QUESTION

3 mins • 1 pt

Organize these options into the right categories

Groups:

(a) Sucrose

,

(b) Lactose

,

(c) Maltose

a(1---4) glycosidic linkage

Media Image

Glucose + Fructose

Media Image

b(1---->4) glycosidic linkage

Media Image

Glucose + Galactose

Glucose + Glucose

a1 -> b2 glycosidic linkage

5.

CATEGORIZE QUESTION

3 mins • 1 pt

Organize these options into the right categories

Groups:

(a) Molisch's Test

,

(b) Iodine Test

H2SO4, EtOH, a-naphthol

Presence of Starch

Presence of Carbohydrates

Strong acid to dehydrate monosaccharide to produce furfural or hydroxymethylfurfural

0.01M or 0.2% Iodine Solution

Red or Pink Solution for Glycogen

Purple ring interphase

Blue-Black Solution for Starch

6.

MATCH QUESTION

1 min • 1 pt

Match the following

Basic Hydrolysis

Epimerizaton of aldoses and ketoses and aldose-ketose interconversion

Acid Hydrolysis

Incomplete hydrolysis that breaks specific bonds.

Enzymatic Hydrolysis

Complete Hydrolysis that produces a monosaccharide product

7.

CATEGORIZE QUESTION

3 mins • 1 pt

Organize these options into the right categories

Groups:

(a) Benedict's Test

,

(b) Barfoed's Test

,

(c) Seliwanoff's Test

,

(d) Bial's Orcinol Test

Brick red precipitate appears ~10 mins for disaccharides

Brick Red Precipitate for all reducing monosaccharides that appears < 3 mins for monosaccharides

Pentoses are dehydrated into furfural which in turn condense with orcinol

Differentiate between aldose and ketose

Cu(C2H3OO)2, acetic acid

Cherry-red solution for ketohexoses

Based on the reduction of cupric acetate by reducing monosaccharides and reducing disaccharides

Blue-green solution for aldopentoses

CuSO4, Na2CO3, Sodium Citrate

For Reducing Sugars; more sensitive than fehling's

Strong acid to dehydrate monosaccharide to produce furfural or hydroxymethylfurfural

Brick Red precipitate for all reducing sugars

Cupric ions reduced to cuprous, forming Cu2O precipitate.

HCl, resorcinol

HCl, FeCl3, and orcinol

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