Carbohydrates

Question 1

what is a single carbohydrate molecule called?

Answer 1

Monosaccharide

Question 2

what are a pair of carbohydrate molecules called?

Answer 2

Disaccharide

Question 3

what are many carbohydrate molecule called?

Answer 3

Polysaccharides

Question 4

Examples of monosaccharides

Answer 4

glucose, galactose, fructose

Question 5

the formula for glucose

Answer 5

C6 H12 O6

Question 6

what does the test for reducing sugars involve?

Answer 6

The Benedict’s test

Question 7

how do you do the benedict’s test?

Answer 7

1. grind up or dissolve sample in water
2. add the benedict’s solution.
3. heat up test tube in boiling water
4. if reducing sugars are present it will go organge

Question 8

what reaction takes place when monosaccharide form disaccharides?

Answer 8

Condensation reaction

Question 9

what is the bond that is formed when monosaccharides form disaccharides?

Answer 9

Glycosidic bond

Question 10

what is the byproduct of producing a disaccharide?

Answer 10

H2O

Question 11

What is the test for non-reducing sugars?

Answer 11

1. add your sample to dilute hydrochloric acid in a test tube and leave in a hot water bath for 5 minutes
2. neutralise the solution by adding sodium hydrogencarbonate.
3. re-do the benedict’s test with the new solution

Question 12

what reaction and bonds are formed when polysaccharides are produced?

Answer 12

Condensation reaction and glycosidic bonds

Question 13

examples of polysaccharides

Answer 13

cellulose, glycogen starch and chitin