Question

Match each subtype of lipid listed on the right to all statements on the left that are appropriate to the lipid subtype.

Question 12 options:

1234 the bi-layer that makes up the plasma membrane around a cell is considered a 'sea' of this type of lipid molecules 1234 the phospholipid, arachodonic acid, serves as the starting molecule that leads to the formation of members of this lipid subtype via the action of lipogenase and cyclooxygenase enzymes 1234 the main member of this lipid subtype in our bodies is a minor but important component in biological membranes like our plasma membranes because it makes those membranes fluid 1234 choleterol is the main member of this lipid subtype present in our bodies 1234 molecules from this lipid subtype act in paracrine fashion to influence blood clotting, produce pain and fever, regulate inflammation, etc. 1234 homrones like estrogen, progesterone, testosterone, vitamin D, cortisol, aldosterone, and DHEA - all made from cholesterol belong to this lipid subtype category 1234 these lipids constitute >90% of all the lipids we consume in our diets 1234 these lipids are metabolized by a process called beta oxidation to produce the bulk of the body's energy (i.e. it's ATP) 1234 these lipids are composed of a glycerol backbone to which 3 fatty acids are linked through ester bonds 1234 these lipids, like plain fatty acids - contain hydrocarbon carbon chains that have -COOH groups at one end and -CH3 groups at the other but unlike straight fatty acids, also contain cyclopentane rings in their centers 1234 these lipids contain glycerol backbones to which 2 fatty acids are attached by ester linkages to carbon 1 and carbon 2; at carbon 3 - an 'R' group is attached via a phosphate group 1234 the major member of this lipid subtype found in our bodies is cholesterol

1. prostaglandins 2. steroid lipids 3. triglycerides 4. phospholipids

Answer 1

Lipids are mainly classified into three subgroups as, triglycerides, steroids and phospholipids. The statements below are thus best suited for the following lipid subgroups,

Triglycerides: Most commonly referred or known as fats.

these lipids are composed of a glycerol backbone to which 3 fatty acids are linked through ester bonds

these lipids are metabolized by a process called beta oxidation to produce the bulk of the body's energy (i.e. it's ATP)

these lipids constitute >90% of all the lipids we consume in our diets

Steroids: Hydrophobic in nature

choleterol is the main member of this lipid subtype present in our bodies

homrones like estrogen, progesterone, testosterone, vitamin D, cortisol, aldosterone, and DHEA - all made from cholesterol belong to this lipid

molecules from this lipid subtype act in paracrine fashion to influence blood clotting, produce pain and fever, regulate inflammation, etc

the major member of this lipid subtype found in our bodies is cholesterol

Phospholipids: These are derrivatives of triglycerides.

these lipids contain glycerol backbones to which 2 fatty acids are attached by ester linkages to carbon 1 and carbon 2; at carbon 3 - an 'R'

the bi-layer that makes up the plasma membrane around a cell is considered a 'sea' of this type of lipid molecules

the phospholipid, arachodonic acid, serves as the starting molecule that leads to the formation of members of this lipid subtype via the action

these lipids, like plain fatty acids - contain hydrocarbon carbon chains that have -COOH groups at one end and -CH₃ groups at the other but

the main member of this lipid subtype in our bodies is a minor but important component in biological membranes like our plasma membranes