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Lipids: Structure, Properties, and Functions

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Lipids: Structure, Properties, and Functions

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Questions and Answers

Which type of lipids contains fatty acids?

Structural lipids

Complex lipids (correct)

Derived lipids

Simple lipids

What is an example of a derived lipid?

Glycolipid

Phospholipid

Triacylglycerol

Cholesterol (correct)

What is the primary function of bile acids?

To form membranes

To act as signaling molecules

To aid in the digestion of fats (correct)

To store energy

Which of the following is NOT a type of lipid?

Nucleic acids (D) Signup and view all the answers

What is the function of phospholipases in lipid signaling pathways?

To hydrolyze phospholipids and release signaling molecules (D) Signup and view all the answers

What is the product of phospholipid hydrolysis by phospholipases in terms of signaling lipids?

Diacylglycerol and arachidonic acid (B) Signup and view all the answers

What is the function of bile acids in the intestine?

To act as detergents and emulsify dietary fats (C) Signup and view all the answers

What is the result of phospholipase C hydrolyzing phosphatidylinositol 4,5-bisphosphate (PIP2)?

The release of IP3 and diacylglycerol (A) Signup and view all the answers

What is the function of phospholipase A1 in phospholipid degradation?

To hydrolyze the ester bond at C-1 of glycerol (D) Signup and view all the answers

What is the function of vitamin E in the body?

To function as a biological antioxidant (C) Signup and view all the answers

What is the result of the complete hydrolysis of a glycerophospholipid?

The release of two fatty acids and a glycerol molecule (D) Signup and view all the answers

What is the function of phosphatidylinositol in the body?

To act as an intracellular signal that regulates cell structure and metabolism (C) Signup and view all the answers

What is the function of eicosanoids in the body?

To mediate many diverse biological effects, including inflammation, pain, and fever (B) Signup and view all the answers

What is the function of phospholipase D in phospholipid degradation?

To hydrolyze specific phosphoester bonds (B) Signup and view all the answers

What is the result of the enzymatic oxidation of arachidonic acid?

The formation of eicosanoids, including prostaglandins, thromboxanes, and leukotrienes (B) Signup and view all the answers

What is the function of vitamin K in the body?

To play a role in blood clotting (D) Signup and view all the answers