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Biological Membranes Composition Quiz

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Questions and Answers

What is the role of lipoproteins in the body?

To store energy in adipose tissue
To provide structural support in cell membranes
To act as enzymes in metabolic pathways
To transport hydrophobic lipids in the aqueous blood plasma (correct)

Which of the following statements about glycerophospholipids is true?

They are used for energy storage
They are non-polar molecules
They are the main component of biological membranes (correct)
They are involved in signal transduction pathways

What is the function of the lipid bilayer in cell membranes?

To store energy in the form of triacylglycerols
To act as a barrier and regulate the movement of substances in and out of the cell (correct)
To catalyze biochemical reactions
To transport lipids in the blood

Which of the following is a non-hydrolyzable lipid?

Cholesterol (C) Signup and view all the answers

What is the primary function of sterols like cholesterol in biological membranes?

To maintain membrane fluidity and permeability (A) Signup and view all the answers

Which of the following is a complex lipid?

Glycerophospholipid (A) Signup and view all the answers

What is the primary function of lipids in the human body?

To store and provide energy (B) Signup and view all the answers

Which of the following lipids is involved in cell signaling pathways?

Sphingosine-1-phosphate (C) Signup and view all the answers

What is the role of the iodine number in the characterization of lipids?

To determine the degree of saturation in fatty acids (C) Signup and view all the answers

Which of the following statements about lipid hydrogenation is true?

It is used to protect lipids from oxidation and rancidity (C) Signup and view all the answers