B3 Biological Molecules Flashcards
What are the building blocks of carbohydrates?
Simple sugars
What are the building blocks of lipids?
Fatty acids and glycerol
What are the building blocks of proteins?
Amino acids
Which elements do carbohydrates contain?
Carbon, hydrogen, and oxygen
Which elements do proteins contain?
Carbon, hydrogen, oxygen, and nitrogen
Which elements do lipids contain?
Carbon, hydrogen, and oxygen
What is cellulose used for?
- Makes up the plant cell wall
- Structure
What is starch and glucose used for?
Used in respiration to provide energy for the organism
Where is starch and glucose stored?
Cells
How do amino acids bind together to make proteins?
They form chains
What are lipids used for?
- To make cell membranes
- To store energy
- Insulation
What is the test for starch?
Iodine solution
What is the test for glucose?
Benedict’s solution
What is the test for protein?
Biuret test
What is the test for fats and oils?
Ethanol
Result if starch is present
brown –> dark blue
Result if glucose is present
Green –> yellow –> orange/red
Result if protein is present
Turns purple
Result if fat is present
Cloudy white solution formed
What can be used as a solvent?
water
Larger molecules of starch and glycogen
glucose