Carbohydrates (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the ratio of hydrogen to oxygen atoms in all carbohydrates?
What is the ratio of hydrogen to oxygen atoms in all carbohydrates?
2:1
Which carbohydrates can be directly absorbed into the bloodstream?
Which carbohydrates can be directly absorbed into the bloodstream?
Monosaccharides only
Where is the -OH group positioned on C1 in α-glucose?
Where is the -OH group positioned on C1 in α-glucose?
Below the ring
Which monosaccharides combine to form lactose?
Which monosaccharides combine to form lactose?
Glucose and galactose
What colour indicates a high concentration of reducing sugar in Benedict's test?
What colour indicates a high concentration of reducing sugar in Benedict's test?
Brick red
What must be added first when testing for non-reducing sugars?
What must be added first when testing for non-reducing sugars?
Dilute hydrochloric acid
Which type of glycosidic bond creates branches in amylopectin?
Which type of glycosidic bond creates branches in amylopectin?
1,6-glycosidic bonds
How does glycogen differ structurally from starch?
How does glycogen differ structurally from starch?
Glycogen has more frequent branching
Why must alternate β-glucose molecules be inverted in cellulose?
Why must alternate β-glucose molecules be inverted in cellulose?
Due to -OH position on C1
Why do organisms store glucose as polysaccharides rather than free glucose?
Why do organisms store glucose as polysaccharides rather than free glucose?
To avoid osmotic problems