B4 - Biological Molecules Flashcards
Chemical elements that make up carbohydrates
Carbon, oxygen and hydrogen
Chemical elements that make up protein
Carbon, hydrogen, oxygen and nitrogen
Chemical elements that make up fats
Carbon, hydrogen and oxygen
What are the larger molecules made from glucose
Starch, glycogen, and cellulose
What are proteins made from
Amino acids
What are fats and oils made up of
Fatty acids and glycerol
What does iodine solution test for
Starch
What does Benedict’s solution test for?
Reducing sugars
What does the biuret test for
Protein
What does the ethanol emulsion test for
Fats and oils
How many different amino acids are there
20
What is a) one sugar called b) two sugars c) many sugars
A) monosaccharide b) disaccharide c) polysaccharide
What is the colour of a negative iodine test
Orange brown
What is the colour of a positive iodine test
Blue-black
What is the colour of a negative biuret test
Blue
What is the colour of a positive biuret test
Purple
What is the colour of a negative ethanol emulsion test
Clear/colorless
What is the colour of a positive ethanol emulsion test
Cloudy emulsion
What is the colour of a negative Benedict’s solution test
Blue
What is the colour of a Benedict’s solution test if there is a trace of a reducing sugar
Green / yellow
What is the colour of a moderate amount of a reducing sugar in the Benedict’s solution test
Orange
What is the colour of a high amount of a reducing sugar in a Benedict’s solution test
Brick red
Name reducing sugars
Glucose, maltose, fructose and galactose
Name monosaccharides
Fructose, galactose and glucose
Give an example of a food containing starch
Rice, bread, potato, pasta, etc
Give an example of a food containing protein
Meats, tofu, bacon, etc
Name a food containing glucose
Apple, sugars, etc
Give an example of foods with fats/lipids
Butter, cheese, egg yolk, chocolate
