Lesson 1.4.2
1.4.2 Glycosidic bonds, hydrolysis and energy storage Quiz: Pearson Edexcel Biology, Unit 1
20 questions
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Lesson 1.4.2, Glycosidic bonds, hydrolysis and energy storage: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 1: Lifestyle, Health and Risk, written with Revision Ninja.
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The 20 questions
-
What type of reaction joins two monosaccharides to form a glycosidic bond?
- Hydrolysis
- Condensation
- Reduction
- Oxidation
-
Which type of reaction breaks a glycosidic bond by adding water?
- Hydrolysis
- Polymerisation
- Condensation
- Oxidation
-
Which enzyme hydrolyses maltose into glucose in the small intestine?
- Maltase
- Amylase
- Sucrase
- Lactase
-
Which enzyme hydrolyses starch into maltose in the mouth and small intestine?
- Amylase
- Lipase
- Protease
- Maltase
-
Why does storing starch instead of glucose prevent osmotic swelling in plant cells?
- Starch is insoluble
- Starch is acidic
- Starch is soluble
- Starch is reactive
-
A glycosidic bond joins two glucose units in amylose. What type of bond is formed between carbon atoms 1 and 4?
- A peptide bond
- An ester bond
- A 1,4 glycosidic bond
- A 1,6 glycosidic bond
-
Which bond is found at the branch points of amylopectin?
- An ester bond
- A 1,6 glycosidic bond
- A 1,4 glycosidic bond
- A hydrogen bond
-
How many water molecules are released when three glucose molecules are joined in a linear chain by two glycosidic bonds?
- 1
- 4
- 3
- 2
-
Why must glycogen be hydrolysed before its units can enter cell respiration?
- To remove glucose
- To add oxygen
- To produce starch
- To release glucose
-
Which reaction converts liver glycogen back into glucose when blood sugar levels fall?
- Hydrolysis
- Condensation
- Polymerisation
- Oxidation
-
A sample of maltose has a mass of 3.42 g. How many moles of glucose can be released by complete hydrolysis? (Mr of maltose = 342)
- 0.01 mol
- 0.2 mol
- 0.04 mol
- 0.02 mol
-
How is the chemical energy stored in glycogen released for cellular use?
- Hydrolysis then respiration
- Condensation then respiration
- Respiration then hydrolysis
- Hydrolysis then photosynthesis
-
What Benedict's test result is expected after sucrose is hydrolysed by sucrase?
- Positive result
- No change
- Clear solution
- Negative result
-
Which product is formed by the hydrolysis of lactose?
- Glucose and fructose
- Two glucose molecules
- Glucose and galactose
- Galactose and fructose
-
Why does branching allow glycogen to be hydrolysed rapidly by enzymes?
- Weaker bonds
- Higher solubility
- More free ends
- Fewer free ends
-
Which enzyme hydrolyses the glycosidic bond in sucrose?
- Lipase
- Sucrase
- Protease
- Lactase
-
What molecule is released during the formation of a disaccharide from monosaccharides?
- Hydrogen
- Carbon dioxide
- Water
- Oxygen
-
Which type of chemical bond joins monosaccharides together in a polysaccharide?
- Ester bond
- Glycosidic bond
- Hydrogen bond
- Peptide bond
-
What enzyme hydrolyses glycosidic bonds in starch to produce maltose?
- Maltase
- Sucrase
- Amylase
- Lactase
-
What is the empirical formula of glucose, C6H12O6?
- C6H12
- CH2O
- C2H4O2
- CH4O
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