LIPIDS

Function/s of Triglycerides

• Source of Energy

• Building blocks for lipids

• Storage form of fatty acids

• AOTA

Answer explanation

Triglycerides is the storage form of fatty acids to be used for energy. It also provide insulation to vital organs in the form of fat deposits.

Which among the choices is a function of phospholipids?

• Provide insulation to vital organs

• Part of lipoprotein

• Source of energy

• None of the choices

Answer explanation

"Provide insulation to vital organs" is a function of triglycerides while "part of lipoprotein" is a function of fatty acids. Phospholipid functions as part of lipoprotein for lipid transport.

Which of the following is/are classification/s of lipids?

a. Fatty Acids

b. Triglycerides

c. Cholesterol

d. Phospholipids

• AOTA

• NOTA

• A and B only

• A, B, and C only

Answer explanation

There are 4 classifications of lipids: (page98-101)

a. Fatty Acids

b. Triglycerides

c. Cholesterol

d. Phospholipids

Which of the following is/are product of the enzyme pancreatic lipase?

• Triglyceride

• 2-monoacylglycerol

• Both

• None of the choices

Answer explanation

Triglyceride is a substrate and 2-monoacylglycerol together with free fatty acids are the products of pancreatic lipase.

Cholesterol is an amphipathic lipid

• True

• False

• Maybe

Answer explanation

The only hydrophilic part of cholesterol is the hydroxyl group in the A-ring which makes it an amphipathic lipid and is therefore found on the surface of lipid layers along with phospholipid.

It is the simplest lipid classification.

• Fatty Acids

• Triglycerides

• Cholesterol

• Phospholipids

Answer explanation

Fatty acids is the simplest lipid class composed of straight-chain hydrocarbons with a terminal carboxyl group.

Which of the following is a CHARACTERISTIC of lipids?

• They are not soluble in water

• They are either fats or oils

• They are composed of nitrogenous chains

• They are polar molecules.

Answer explanation

Lipids tend to be hydrophobic and therefore insoluble in water.

Cholesterol derivatives with sterol ring to which glycine or taurine is covalently attached.

• Secretin

• Bile salts

• Cholecystokinin

• Pancreozymin

Answer explanation

Bile salts are cholesterol derivatives with sterol ring to which glycine or taurine is covalently attached.

(Page 101)

Individuals with defective ABCG5 and ABCG8 transporters have a predisposition for atherosclerosis.

• True

• False

• I don't know

• I don't care

Answer explanation

Individuals with defective ABCG5 and ABCG8 transporters have a predisposition for atherosclerosis is true because of increased cholesterol and plant sterol absorption (Page 102)

Which among the following statements is NOT TRUE?

• Trans fatty acids are produced by heating liquid vegetable

• Trans fats are produced to harden vegetable oils into shortening and margarine

• Trans fats are not produced in the gastrointestinal tract of cattle.

Answer explanation

Small amount of trans fat is produced in the gastrointestinal tract of cattle, so that low levels of these isomers are found in dairy and beef fat.