4.1 Biological Molecules
,Learning Objectives:
1. List the chemical elements that make up: carbohydrates, fats and
proteins
2. State that large molecules are made from smaller molecules, limited
to:
a) starch, glycogen and cellulose from glucose
b) proteins from amino acids
c) fats & oils from fatty acids & glycerol
3. Describe the use of:
a) iodine solution test for starch
b) biuret test for proteins
c) ethanol emulsion test for fats & oils
e) DCPIP test for vitamin C
,4. Describe the structure of a DNA molecule:
a) 2 strands coiled together to form a double helix
b) each strand contains chemical called bases
c) bonds between pairs of bases hold the strands together
d) the bases always pair up in the same way:
A with T, C with G
, Recap:
Organisms are made of carbohydrates, proteins, lipids, water and minerals.
Carbohydrates, proteins and lipids are used to build cells and subcellular structures
(membranes, organelles) .
Carbohydrates and protein molecules are polymers, made up of many repeating units.
● Carbohydrates are made from sugars.
● Proteins are made from amino acids.
● Lipids are made from fatty acids and glycerol.
,Learning Objectives:
1. List the chemical elements that make up: carbohydrates, fats and
proteins
2. State that large molecules are made from smaller molecules, limited
to:
a) starch, glycogen and cellulose from glucose
b) proteins from amino acids
c) fats & oils from fatty acids & glycerol
3. Describe the use of:
a) iodine solution test for starch
b) biuret test for proteins
c) ethanol emulsion test for fats & oils
e) DCPIP test for vitamin C
,4. Describe the structure of a DNA molecule:
a) 2 strands coiled together to form a double helix
b) each strand contains chemical called bases
c) bonds between pairs of bases hold the strands together
d) the bases always pair up in the same way:
A with T, C with G
, Recap:
Organisms are made of carbohydrates, proteins, lipids, water and minerals.
Carbohydrates, proteins and lipids are used to build cells and subcellular structures
(membranes, organelles) .
Carbohydrates and protein molecules are polymers, made up of many repeating units.
● Carbohydrates are made from sugars.
● Proteins are made from amino acids.
● Lipids are made from fatty acids and glycerol.
