Lab exam exercise 4

Question 1

Title of exercise 4

Answer 1

SALIVARY AMYLASE DIGESTION OF STARCH

Question 2

In the first digestive reaction of starch, a disaccharide called _________ is produced.

Answer 2

maltose

Question 3

Maltose consists of ____________ joined together.

Answer 3

two glucose molecules

Question 4

In humans, the production of maltose from starch occurs within the ________ in a reaction catalyzed by _________, an enzyme found in human saliva.

Answer 4

mouth
amylase

Question 5

an enzyme found in human saliva

Answer 5

amylase

Question 6

This exercise is based on the fact that intact starch can combine with an _________ to produce a _________ substance

Answer 6

iodine solution
blue-black colored

Question 7

Maltose ________ combine with iodine to produce this color. Therefore, in the presence of iodine, the digestion of starch into maltose will be accompanied by the disappearance of the blue-black color.

Answer 7

cannot

Question 8

MATERIALS

Answer 8

1% maltose solution – 1ml
electric stove
1% starch solution – 50ml
wire gauze
1% iodine solution – 10ml
small funnel
0.5M HCl in dropper bottle – 10 ml
filter paper
5 small beakers (100ml) 5ml glass pipet
5 disposable pipets
bulb
6 test tubes (5ml) distilled water 100ml