Biological Molecules
Living things are built from carbohydrates, proteins, lipids and nucleic acids, which provide energy and structure.
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Living things are built from carbohydrates, proteins, lipids and nucleic acids, which provide energy and structure.
- Carbohydrates give quick energy
- Proteins build and repair
- Lipids store energy and insulate
🧠 Quick quiz
Three questions. Score 2 or more to complete the topic.
What is Biological Molecules?
Within Biology, which covers cells, the human body, genetics, evolution, plants and ecosystems: the science of living things, this topic explains Biological Molecules. Biology topics show how living things work, from the cell up to whole ecosystems, with models you can explore step by step.
Check that you can explain Biological Molecules in your own words and give one example from everyday life. If you can do that, you have understood the core idea.
Understanding Biological Molecules helps you explain how living things stay alive and respond to their surroundings, which is central to biology exams.
Biological Molecules in detail
The main biological molecules are carbohydrates, proteins and lipids. Carbohydrates, such as glucose and starch, are made of carbon, hydrogen and oxygen and provide energy. Proteins are made of long chains of amino acids and are used for growth, repair and enzymes. Lipids (fats and oils) are made of fatty acids and glycerol and store energy and insulate.
Large molecules are built from smaller units by joining them: starch from glucose, protein from amino acids. Nucleic acids such as DNA carry genetic information. Understanding them explains the role of food in the body and how cells are built.
How the interactive helps you understand Biological Molecules
Click a card to flip it and reveal the answer, then move on to the next one.
Before you change anything, predict the result. Then change one value at a time and check whether your prediction was right. This is a quick way to build a correct mental model of Biological Molecules.
Real-life uses and examples
- Connect Biological Molecules to health, food and medicine in everyday life.
- Use Biological Molecules to interpret a diagram, graph or microscope image from a practical.
- Structure a longer answer about Biological Molecules by moving from definition to example to consequence.
Common mistakes to avoid
- Listing the steps of a process without saying how one step causes the next.
- Using everyday words, such as “energy” or “bad”, without their scientific meaning.
- Learning the definition without testing it. Use the quiz and the interactive to check that you can apply the idea.
Frequently asked questions about Biological Molecules
What is Biological Molecules?
Living things are built from carbohydrates, proteins, lipids and nucleic acids, which provide energy and structure.
What are the most important points about Biological Molecules?
The main points are: Carbohydrates give quick energy; Proteins build and repair; Lipids store energy and insulate.
Why is Biological Molecules useful?
Understanding Biological Molecules helps you explain how living things stay alive and respond to their surroundings, which is central to biology exams.
How can I practise Biological Molecules?
Open the interactive at the top of this page and change the controls one at a time. Predict the result before each change, then take the three-question quiz. A score of two or more marks the topic as complete on this device.
Which topics are related to Biological Molecules?
Related topics in Biology include The Digestive System, Photosynthesis, Transport in Plants.