Lipids in Biology

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Questions and Answers

Which of the following is NOT a main type of lipid?

  • Fatty acids
  • Phospholipids
  • Sterols
  • Proteins (correct)

Lipids are soluble in water.

False (B)

What are the main building blocks of lipids?

Fatty acids

The long hydrocarbon chains of fatty acids can be either ______ or ______.

<p>saturated</p> Signup and view all the answers

Match the type of lipid with its primary function:

<p>Triglycerides = Energy storage Phospholipids = Cell membrane structure Sterols = Hormones and cell membrane components</p> Signup and view all the answers

Flashcards

Lipids

Organic compounds that include fats, oils, waxes, and steroids; insoluble in water, soluble in nonpolar solvents.

Fatty Acids

Building blocks of lipids; consist of long hydrocarbon chains, can be saturated or unsaturated.

Triglycerides

Lipids composed of three fatty acids bonded to glycerol; main components of fats and oils.

Phospholipids

Lipids that are a major component of cell membranes; consist of two fatty acids and a phosphate group.

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Sterols

A type of lipid including cholesterol; important for cell membrane stability.

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Study Notes

Lipids

  • Lipids are organic compounds, including fats, oils, waxes, and steroids.
  • They are hydrophobic (insoluble in water), but soluble in nonpolar solvents.
  • Key types include fatty acids, triglycerides, phospholipids, sterols, and prostaglandins.

Fatty Acids

  • Fatty acids are the building blocks of lipids.
  • They have long hydrocarbon chains.
  • These chains can be saturated or unsaturated.

Triglycerides

  • Triglycerides consist of fatty acids bonded to a glycerol molecule.
  • They are the main components of fats and oils.

Phospholipids and Sterols

  • Phospholipids and sterols (like cholesterol) are crucial components of cell membranes.

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