Triglycerides Flashcards
Are lipids organic molecules ?
YES
what are the 2 main types of lipids
- TRIGLYCERIDES
- PHOSPHOLIPIDS
What are triglycerides a source of?
They are used as a source of energy
eg: butter, cooking oil
What are phospholipids used for?
They are used to make cell membrane
What are elements making up lipids
Carbon
Hydrogen
Oxygen
Do lipids have the same elements as carbs?
YES (C,H,O)
ARE LIPIDS MACROMOLECULES?
YES, THEY ARE VERY LARGE MOLCULES
ARE LIPIDS POLYMERS?
NO
WHY ARE LIPIDS NOT POLYMERS?
It is only a long molecule but it is not made of monomers and doesn’t have small units you can break it down into
Are lipids polar or non polar? DO THEY DISSOLVE IN WATER?
NON POLAR AND THEY DON’T DISSOLVE IN WATER
What is the structure of a triglyceride (The fat used as energy)?
It is made of one glycerol and 3 fatty acids
glycerol structure
it is an organic molecule (alcohol) which has 3 hydroxyl groups
fatty acid structure
Organic acid know as Carboxylic acid
having Carboxylic group (COOH) at the end of the molecule
Do the fatty acids have cooh groups throughout or at the end?
The molecule has a hydrocarbon tail with the carboxylic group at the end
When writing or drawing the structure, what is used to represent the hydrocarbon chain in the molecule?
the letter R
How is a triglyceride molecule formed and by which reaction are its components joined?
when we join a glycerol to 3 fatty acids by condensation reaction
when making triglyceride what byproduct is formed and how?
water molecule is formed as 2 hydrogen atoms and an oxygen is removed
What is the name of the bond formed between a glycerol and a fatty acid?
an ester bond
What is the name of the molecule where glycerol is joined to one fatty acid? What about 2 fatty acids?
-Monoglyceride
-Diglyceride
What is the definition of an ester bond
covalent bond formed by condensation reaction
between an OH group of a carboxylic acid and OH group of an alcohol
how many condensation reactions are needed to form a triglyceride
3 condensation reactions forming 3 water molecules
how many ester bonds are there in a triglyceride?
3
how many hydrolysis reactions are needed to break down a triglyceride into a glycerol and 3 fatty acids
3 hydrolysis reactions
How many water molecules are needed to break down the triglyceride
3 water molecules
