Lipids (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which property makes lipids insoluble in water but soluble in organic solvents?
Which property makes lipids insoluble in water but soluble in organic solvents?
Low proportion of oxygen
Which type of lipid forms the structural basis of all cell membranes?
Which type of lipid forms the structural basis of all cell membranes?
Phospholipids
How much energy do lipids provide per gram when oxidised?
How much energy do lipids provide per gram when oxidised?
38 kJ/g
What important metabolic by-product is released when lipids are oxidised?
What important metabolic by-product is released when lipids are oxidised?
Water
What do plants and insects produce on their surfaces to reduce water loss?
What do plants and insects produce on their surfaces to reduce water loss?
Waxy lipid cuticles
Why are fats effective thermal insulators?
Why are fats effective thermal insulators?
Poor heat conductivity
By how much can myelin sheaths increase the speed of nerve impulses?
By how much can myelin sheaths increase the speed of nerve impulses?
Up to 100 times
Which organs are protected by cushioning fat deposits?
Which organs are protected by cushioning fat deposits?
Kidneys
Why do fats remain solid at room temperature while oils stay liquid?
Why do fats remain solid at room temperature while oils stay liquid?
Fats have saturated fatty acids
How many main biological roles do lipids serve?
How many main biological roles do lipids serve?
Five