biological molecules

Question 1

what are biological molecules?

Answer 1

biological molecules are large, complex chemicals that’s are essential for life. your body uses them to grow repair and stay alive.

Question 2

what are the three types of biological molecules?

Answer 2

carbohydrates, proteins and lipids(fats)

Question 3

what are carbohydrates?

Answer 3

sugars and starches that your body uses for quick energy

for example: bread rice pasta fruits and sweets

Question 4

how do carbohydrates work?

Answer 4

when your at carbohydrate your body breaks them down into glucose(sugar) which fuels your cells.

Question 5

what are proteins?

Answer 5

proteins are made of tiny building blocks called amino acids.

for example: meat, fish, eggs, beans, and nuts

Question 6

how do proteins work?

Answer 6

proteins are used to build muscles, skin, hair and nails they also help your body repair itself.

Question 7

what are lipids(fats)?

Answer 7

fats and oils that store energy and protect your organs.

examples in animals: butter, oily fish, cheese, and avocado
examples in plants: sunflower oil, olive oil, rapeseed oil and margarine

Question 8

how do lipids/fats work?

Answer 8

lipids give you long term energy and help your body absorb vitamins. they also make up the membranes of your cells.

Question 9

what chemical elements required to make carbohydrates?

Answer 9

carbon, hydrogen and oxygen

Question 10

what chemical elements are required to make lipids?

Answer 10

carbon, hydrogen and oxygen

Question 11

what chemical elements are required to make proteins?

Answer 11

carbon, hydrogen, oxygen and nitrogen

Question 12

what are carbohydrates made up of?

Answer 12

made up for simple sugar e.g. glucose

Question 13

what are lipids made up of?

Answer 13

made up of fatty acids and glycerol

one glycerol is joined to three fatty acids

Question 14

what are proteins made up of?

Answer 14

made up of amino acids

Question 15

what is the chemical test for starch?

Answer 15

iodine solution, add 2 drops
+ blue or black
- orange

Question 16

what is the chemical test for glucose?

Answer 16

benedict’s solution
equal volume + heat to 80 degrees
+ green orange and red
- blue

Question 17

what is the chemical test for protein?

Answer 17

biurets solution
equal volume
+purple
- blue

Question 18

what is the chemical test for lipids?

Answer 18

ethanol
add 2ml of ethanol (shake)
2ml of distilled water
+ white emulsion
- no emulsion