BX4 Quiz

What is the regulatory enzyme in cholesterol synthesis?

• thiolase

• HMG reductase

• HMG-liase

• HMG synthase

• acyltransferase

What class do proteases belong to?

• Transferases

• Hydrolase

• Oxidoreductases

• Ligases

• Isomerases

What acid is predominant in human lipids?

• Stearic acid

• Oleic acid

• Palmitic acid

• Linoleum acid

• linolenic acid

Arachidonic acid in the human body is synthesized from?

• Palmitic acid

• Stearic acid

• Linoleic acid

• Linolenic acid

• Oil acid

What could be the cause of familial hypercholesterolemia?

• lipoprotein lipase deficiency

• decrease in LCAT (lecithin-cholesterol acyltransferase) activity

• reducing the number of LDL receptors

• glycosylation of apoproteins

• reduction of HDL concentration in blood plasma

Cholesterol synthesis in the liver is regulated at the stage of formation of what?

• squalene

• mevalonate

• acetoacetyl-CoA

• lanosterol

• HMG-CoA

What are the lightest and largest lipoproteins?

• HDL

• VLDL

• chylomicrons

• IDL

• LDL

What is the product of a regulatory reaction in the synthesis of cholesterol?

• Squalene

• Mevalonate

• Acetoacetyl-CoA

• Lanosterol

• HMG-CoA

What reaction do proteolytic enzymes catalyze?

• hydrolysis of phosphodiester bonds

• hydrolysis of glycoside bonds

• hydrolysis of peptide bonds

• isomerization

• transferring groups

What do carboxypeptidases catalyze?

• cleavage of C-terminal radicals from protein molecules

• hydrolysis of sucrose

• Starch hydrolysis

• Lipid hydrolysis

• Hydrolysis of dipeptides