Lipid Metabolism and Classification Quiz

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Which type of lipid is composed of 1, 2 or 3 fatty acids linked with a single glycerol?

Terpenes

Sphingolipids

Eicosanoids

Acyglycerides (correct)

Which type of fatty acid contains no double bonds?

Phosphoaclyglicerides

Saturated FA (correct)

Waxes

Unsaturated FA

What is the defining feature of lipids?

Low reactivity with water

High reactivity with water

Solubility in water

Insolubility in water (correct)

Which lipid is a structural lipid present in cell membranes and serves as a precursor for steroid hormones?

Cholesterol Signup and view all the answers

What is the role of bile acids derived from cholesterol?

Emulsifying dietary fats in the intestine Signup and view all the answers

Which type of fatty acid has a carboxylic acid group and hydrocarbon chains ranging from 4 to 36 carbons long?

Fatty acids Signup and view all the answers

What is the role of carnitine in lipid metabolism?

Facilitates transport of fatty acids into mitochondria for oxidation Signup and view all the answers

Which lipid type can be divided into several structural units?

Complex lipids Signup and view all the answers

What is the common feature of acylglycerides?

Composed of fatty acids linked with glycerol Signup and view all the answers

What is the energy storage form of fatty acids?

Triacylglycerols Signup and view all the answers

What are eicosanoids derived from?

Arachidonic acid and other polyunsaturated fatty acids Signup and view all the answers

What is the role of bile salts in lipid digestion?

Rendering lipid droplets more accessible to digestion by lipases Signup and view all the answers

Where are triacylglycerols reformed from free fatty acids and monoacylglycerol?

In the intestine Signup and view all the answers

Which lipoprotein carries cholesterol from the liver to other tissues?

Low-density lipoprotein (LDL) Signup and view all the answers

What stimulates the mobilization of triacylglycerols stored in adipose tissue?

Epinephrine and glucagon Signup and view all the answers

Which enzyme is required for the activation of fatty acids and their transport into the mitochondria for oxidation?

Fatty acyl–CoA synthetase Signup and view all the answers

What is the role of L-carnitine in lipid metabolism?

Transporting activated fatty acids into the mitochondria Signup and view all the answers

Where does fatty acid synthesis occur?

Cytosol Signup and view all the answers

What promotes fatty acid synthesis?

Insulin Signup and view all the answers

What happens when there is a need for metabolic energy?

Triacylglycerols stored in adipose tissue are mobilized and transported to energy-requiring tissues. Signup and view all the answers

What is the role of lipoproteins in transporting lipids in the blood?

Solubilize the lipids and direct them to specific targets. Signup and view all the answers

Which hormone stimulates lipolysis during fasting?

Glucagon Signup and view all the answers