B3

Question 1

Is tissue is a group of what?

Answer 1

Group of cells with similar functions and structure

Question 2

What are organs

Answer 2

Collections of tissues performing specific funtions

Question 3

Organs formed into organ systems to do what?

Answer 3

Work together and make organisms

Question 4

Digestive system and all functions inside use-goodnotes work B3

Answer 4

!

Question 5

What are carbohydrates made up out of ?

Answer 5

Units of sugar

Question 6

BENEDICT TEST TO TEST FOR SUGAR:

Answer 6

1 Place a small amount of food in a test tube.
2 Add enough Benedict’s solution to cover the food.
3 Place the test tube in a warm water bath for 10 minutes.
4 Blue Benedict’s solution turns brick red on heating if a sugar such as glucose is present.
5 Record your result in the results table.
6 Repeat steps 1–5 for other types of foo

Question 7

IODINE SOLUTION FOR STARCH:

Answer 7

1 Place a small amount of food on the spotting tile.
2 Add a few drops of iodine solution to the food on the
spotting tile.
3 Yellow–red iodine solution turns blue–black if starch is present.
4 Record your result in the results table.
5 Repeat steps 1–4 for other types of food.

Question 8

BIURET TEST FOR PROTEINS:

Answer 8

1 Place a small amount of food in a test tube.
2 Add 1 cm3 of Biuret reagent. Alternatively add 1 cm3 of sodium hydroxide solution and then add a few drops of copper sulfate solution.
3 Blue Biuret reagent turns purple if a protein is present.
4 Record your result in the results table.
5 Repeat steps 1–4 for other types of food.

Question 9

TEST FOR LIPIDS

Answer 9

1 Place a small amount of food into a test tube.
2 Add a few drops of ethanol to the test tube.
3 Shake the test tube and leave for 1 minute.
4 Pour the solution into a test tube of water.
5 Ethanol added to a solution gives a cloudy white layer if a lipid is present.
6 Record your result in the results table.
7 Repeat steps 1–6 for other types of food.