Everything On Biological Mol Flashcards
Name some roles of lipids
Electrical insulation
Cushioning for vital organs
Thermal insulation
Membrane formation
Hormone production
Long term energy storage
What does a triglyceride consist of? Which type of bonds hold it together?
Glycerol and 3 fatty acids joined by ester bonds
What do lipids contain?
Hydrogen, carbon and oxygen
What are triglycerides?
Triglycerides are lipids made of one molecule of glycerol
How are triglycerides formed?
They are formed in condensation reactions
How many water molecules are needed when breaking down triglyceride?
3
What are the two types of lipids?
Saturated and unsaturated
Where are saturated lipids found in ?
Animal fats
True or false “saturated lipids don’t contain any carbon-carbon double bonds”
True
Where can unsaturated lipids be found in ?
Plants
Which type of lipid melts at lower temperatures?
Unsaturated lipids
True or false “unsaturated lipids contain carbon-carbon double bonds”
True
Why does unsaturated lipids have lower melting points?
Because the greater number of unsaturated bonds, the weaker the intermolecular bonds resulting in lower melting points.
What do phospholipids contain?
Glycerol, 2 fatty acids and phosphate
What are phosphate heads? Hydrophilic or hydrophobic
Hydrophilic meaning ‘water loving’
