Lipids

Question 1

What are fatty acids?

Answer 1

the main component of Lipids

Question 2

Saturated fatty acids

Answer 2

there are no C=C bonds and the molecule has as many hydrogen atoms as possible.

Question 3

Unsaturated fatty acids

Answer 3

there is at least one C=C bond, therefore the molecule contains fewer hydrogen atoms than is maximally possible.

Question 4

how is a triglyceride molecule formed?

Answer 4

by joining one molecule of glycerol to three fatty acids through three condensation reactions, forming ester bonds.

Question 5

Why are triglycerides used in respiration and energy storage?

Answer 5

due to its insolubility and high carbon to hydrogen ratio.

Question 6

how is a Phospholipid molecule formed?

Answer 6

replace one of the fatty acid chains in triglycerides with a phosphate molecule.

glycerol has I phosphate group and 2 fatty acids attached

Question 7

Why are phospholipids used in membranes?

Answer 7

hydrophobic tails and hydrophilic heads of
phospholipids allow them to
form phospholipid bilayers.. so can separate to aqueous environments