AVCL 2

Question 1

Originates from the fat that many, but not all, members of this class of have the general molecular formula Cn(H2O)n and thus were once considered hydrates of carbon.

Answer 1

Carbohydrates

Question 2

The simplest carbohydrates which can be aldoses or ketoses.

Answer 2

Monosaccharides

Question 3

How many carbons does Monosaccharides have?

Answer 3

3-6 carbons

Question 4

Ribose, Glucose, and Fructose are an example of what type of carbohydrates?

Answer 4

Monosaccharides

Question 5

Two monosaccharides may be combined together with the loss of one molecule of water to form what?

Answer 5

Disaccharides

Question 6

What is the bond that connects 2 monosaccharide units in a disaccharide?

Answer 6

Glycosidic Bond

Question 7

Sucrose (table sugar) and Lactose (Milk sugar) are an example of what type of carbohydrates?

Answer 7

Disaccharides

Question 8

It is consist of many monosaccharides linked together.

Answer 8

Polysaccharides

Question 9

Starch, Pectin, Glycogen, and Cellulose are examples of what type of carbohydrates?

Answer 9

Polysaccharides

Question 10

What are the 6 unknown carbohydrates mentioned in AVCL 2.1?

Answer 10

1. Glucose
2. Fructose
3. Lactose
4. Sucrose
5. Starch
6. Water

Question 11

How many ml of each unknown carbohydrates must be poured into the test tubes for the tests?

Answer 11

2 ml

Question 12

This test confirms the presence of carbohydrates in the analyte.

Answer 12

Molisch’s Test

Question 13

How many ml of Molisch’s Reagent must be poured during the Molisch’s Test?

Answer 13

1 ml of Reagent

Question 14

In what angle must be poured during the Molisch’s Test?

Answer 14

45 degrees

Question 15

What must be the color of the positive result of the solution during the Molisch’s Test?

Answer 15

Purplish-Red Rings

Question 16

A test used to determine of reducing sugar

Answer 16

Benedict’s Test

Question 17

How many ml of Benedict’s Reagent must be poured during the Benedict’s Test?

Answer 17

3 ml

Question 18

What is the heating method used in Benedict’s Test and how many minutes will it take to finish?

Answer 18

Boiling water bath in 2 minutes

Question 19

What must be the color of the positive result of the solution during the Benedict’s Test?

Answer 19

Yellow to Brick Red Precipitate

Question 20

A test used in differentiating monosaccharide from disaccharide.

Answer 20

Barfoed’s Test

Question 21

How many ml of Barfoeds Reagent must be

Question 22

How many ml of Barfoed’s Reagent must be poured during the Barfoed’s Test?

Answer 22

3 ml of Barfoed’s Reagent

Question 23

What heating method must be used in Barfoed’s test and how many minutes will it take?

Answer 23

Boiling water bath for 5 minutes.

Question 24

What must be the color of the positive result of the solution during the Barfoed’s Test?

Answer 24

Brick Red Precipitate

Question 25

A test used to determine aldoses from ketosis

Answer 25

Seliwanoff's Test

Question 26

How many ml of Seliwanoff's reagent must be poured during the Seliwanoff's test?

Answer 26

3 ml of Seliwanoff's reagent

Question 27

What heating method is used in Seliwanoff's test and how many minutes will it take?

Answer 27

Boiling water bath in 2 minutes

Question 28

What must be the color of the positive result of the solution during the Seliwanoff's Test?

Answer 28

Cherry Red Solution

Question 29

TRUE or FALSE: Fructose by nature is an aldose.

Answer 29

FALSE Fructose by nature is a KETOSE

Question 30

TRUE or FALSE Succrose is a disaccharide

Answer 30

TRUE

Question 31

A test used to identify pentoses from hexoses.

Answer 31

Bial's Test

Question 32

How many ml of Bial's Reagent must be poured during the Bial's Test?

Answer 32

2 ml of Bial's Reagent

Question 33

What is the heating method used in Bial's Test?

Answer 33

BUNSEN BURNER FLAME until liquid begins to boil

Question 34

What must be the color of the positive result of the solution during the Bial's Test?

Answer 34

Bluish-Green Color

Question 35

A test used to identify polysaccharide in the laboratory

Answer 35

Iodine Test

Question 36

How many drops of iodine is needed during the Iodine Test?

Answer 36

1 drop

Question 37

What must be the color of the positive result of the solution during the Iodine Test?

Answer 37

Blue-Black Colorization