Disaccharides & Polysaccharides (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
What are disaccharides?
What are disaccharides?
Carbohydrates formed from two monosaccharides
Which two monosaccharides combine to form sucrose?
Which two monosaccharides combine to form sucrose?
Glucose and fructose
What is removed during a condensation reaction between two monosaccharides?
What is removed during a condensation reaction between two monosaccharides?
A water molecule
What happens during hydrolysis of a disaccharide?
What happens during hydrolysis of a disaccharide?
Water breaks the glycosidic bond
Why don't non-reducing sugars react with Benedict's reagent when heated?
Why don't non-reducing sugars react with Benedict's reagent when heated?
They lack reactive groups
What chemical is added to neutralise acid when testing for non-reducing sugars?
What chemical is added to neutralise acid when testing for non-reducing sugars?
Sodium hydrogencarbonate
Why are polysaccharides ideal for storage?
Why are polysaccharides ideal for storage?
They are insoluble in water
How many α-glucose molecules can starch contain?
How many α-glucose molecules can starch contain?
Between 200 and 100,000
What colour indicates a positive iodine test for starch?
What colour indicates a positive iodine test for starch?
Blue-black
What is the key difference between condensation and hydrolysis?
What is the key difference between condensation and hydrolysis?
Condensation removes water, hydrolysis adds water