General Properties of Lipids

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is a characteristic of lipids?

Found only in nucleus
Insoluble in water (correct)
Soluble in water
Always polymers

What is true about lipids?

They are composed of nucleic acids
They are usually small molecules (correct)
They are always large molecules
They are found only in proteins

What is different about lipids compared to polysaccharides and proteins?

They are always polymers
They are always found in nucleus
They are not polymers (correct)
They are always found in water

What is a property of lipids that distinguishes them from other biomolecules?

Their insolubility in water (D) Signup and view all the answers

What is NOT a characteristic of lipids?

Always polymers (C) Signup and view all the answers

What are fats and oils classified as?

Esters of fatty acids with glycerol (A) Signup and view all the answers

Which of the following is a characteristic of oils?

Liquid at room temperature (D) Signup and view all the answers

What is the main difference between fats and oils?

State at room temperature (D) Signup and view all the answers

Where are oils typically found?

In plants (B) Signup and view all the answers

What is true about the saturation of oils?

Oils tend to be unsaturated (C) Signup and view all the answers

What is the name of the phospholipid that contains glycerol as the alcohol?

Glycero-phospholipids (B) Signup and view all the answers

What is the alcohol component in Cephalin?

Glycerol (D) Signup and view all the answers

What is the name of the phospholipid that contains Sphingosine as the alcohol?

Sphingophospholipids (A) Signup and view all the answers

What is the component that is common to both Glycero-phospholipids and Sphingophospholipids?

Phosphate (C) Signup and view all the answers

What is the name of the specific phospholipid that contains Sphingosine, fatty acid, phosphate, and choline?

Sphingomyelin (D) Signup and view all the answers

What is the primary function of VLDL?

To transport lipids from the liver to peripheral tissues (A) Signup and view all the answers

Where are the lipids transported to by VLDL?

From the liver to peripheral tissues (D) Signup and view all the answers

What type of lipids are mainly transported by VLDL?

Endogenously synthesized triglycerides (D) Signup and view all the answers

What is the source of the lipids transported by VLDL?

Endogenous synthesis in the liver (B) Signup and view all the answers

What is the name of the lipoprotein that transports dietary lipids?

Kilomicron (C) Signup and view all the answers

Which type of lipoprotein carries cholesterol from the peripheral tissues to the liver?

High-density lipoproteins (HDL) (A) Signup and view all the answers

What is the function of low-density lipoproteins (LDL) in the body?

Carry cholesterol from the liver to peripheral tissues (D) Signup and view all the answers

Which of the following lipoproteins is responsible for transporting excess cholesterol from the peripheral tissues to the liver for excretion?

High-density lipoproteins (HDL) (A) Signup and view all the answers

What is the direction of cholesterol transport by high-density lipoproteins (HDL)?

From peripheral tissues to the liver (D) Signup and view all the answers

What is the term for the 'good' cholesterol that carries cholesterol from peripheral tissues to the liver?

High-density lipoproteins (HDL) (C) Signup and view all the answers

Flashcards are hidden until you start studying

Study Notes

General Properties of Lipids

Lipids are not polymers, but rather small molecules.
Lipids are insoluble in water.

Structure of Lipids

Fats and oils are esters of fatty acids with glycerol.
Oils are liquid and unsaturated, commonly found in plants.
Fats are solid at room temperature.

Phospholipids

Phospholipids contain glycerol as an alcohol, such as:
- Glycero-phospholipids (glycerol + phosphate + fatty acid + choline or ethanolamine)
- Examples: Cephalin (glycerol + unsaturated fatty acid + phosphate + ethanolamine) and Sphingophospholipids (Sphingosine + fatty acid + phosphate + choline)

Lipid Transport

Chylomicrons transport dietary lipids (exogenous) from the small intestine to peripheral tissues.
Very Low Density Lipoproteins (VLDL) transport lipids (endogenously synthesized) mainly triglycerides (TG) from the liver to peripheral tissues.
High Density Lipoproteins (HDL) or "good" cholesterol, carry cholesterol from peripheral tissues to the liver.