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Learning objective

Explain different properties of triglycerides and phospholipids using their structures.

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Topic

Biological molecules official content

Subtopic

Lipids

Aqa A Level BiologyBiological molecules

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Quick explanation

Explain different properties of triglycerides and phospholipids using their structures

  • This point belongs to Biological molecules official content, especially Lipids.
  • You need to be able to explain different properties of triglycerides and phospholipids using their structures.
  • The key ideas to know are phospholipid, lipid, and triglyceride.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

phospholipidlipidtriglyceride

Why it matters

This objective helps connect Lipids to exam-style questions, flashcards, and revision notes for Biological molecules official content.

Quick student answer

Which of the following statements correctly describes a property of triglycerides?

Direct answer

Triglycerides are primarily composed of glycerol and three fatty acids, which results in a high carbon-hydrogen ratio, making them an efficient energy storage molecule.

Key terms

  • Hydrophobic: Describes molecules that do not interact well with water, typically non-polar substances.
  • Bilayer: A double layer of phospholipids that forms the basic structure of cell membranes.

Common trap

Confusing triglycerides with phospholipids: Remember that triglycerides are primarily for energy storage, while phospholipids are key components of cell membranes due to their amphipathic nature.

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