Lesson 3.1.2.2
3.1.2.2 Polysaccharides: glycogen, starch and cellulose Quiz: AQA Biology, Unit 1
20 questions
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Lesson 3.1.2.2, Polysaccharides: glycogen, starch and cellulose: 20 multiple choice questions for the AQA Biology (7402), Unit 1: Biological molecules, written with Revision Ninja.
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The 20 questions
-
Which polysaccharide is the main storage carbohydrate in animal cells?
- Glycogen
- Cellulose
- Starch
- Chitin
-
Which monomer is cellulose made from?
- Alpha-glucose
- Fructose
- Beta-glucose
- Galactose
-
Which monomer is used to build starch and glycogen?
- Fructose
- Galactose
- Alpha-glucose
- Beta-glucose
-
Starch is made from which two polysaccharide components?
- Amylopectin and glycogen
- Amylose and cellulose
- Cellulose and glycogen
- Amylose and amylopectin
-
What is the primary function of cellulose in plant cell walls?
- Energy storage
- Enzyme catalysis
- Structural support
- Water transport
-
Which polysaccharide is more highly branched than starch?
- Sucrose
- Maltose
- Cellulose
- Glycogen
-
In which type of organism is starch the main storage polysaccharide?
- Fungi only
- Animals
- Plants
- Bacteria only
-
Why does storing glucose as glycogen prevent water from entering a cell by osmosis?
- Glycogen is reactive
- Glycogen is insoluble
- Glycogen is acidic
- Glycogen is soluble
-
Which structural feature of glycogen allows rapid hydrolysis into glucose during respiration?
- Highly branched structure
- Cross-linked microfibrils
- Helical coiled chains
- Linear unbranched chains
-
Which bond type in cellulose cannot be hydrolysed by human digestive enzymes?
- Alpha-glycosidic bond
- Peptide bond
- Beta-glycosidic bond
- Ester bond
-
What is the mass in grams of a single linear polymer made from 1000 glucose units (180 each), formed by condensation?
- 180000
- 162018
- 162000
- 162036
-
How many molecules of water are released when 1000 alpha-glucose units form a single unbranched starch-like chain?
- 998
- 1000
- 1001
- 999
-
Which monomer forms long, unbranched chains in cellulose?
- Beta-glucose
- Alpha-glucose
- Galactose
- Fructose
-
Which enzyme hydrolyses starch into maltose during digestion in humans?
- Maltase
- Amylase
- Lactase
- Cellulase
-
Which isomer of glucose is the monomeric unit of glycogen?
- Alpha-glucose
- Beta-glucose
- Fructose
- Galactose
-
Which organ stores glycogen to help regulate human blood glucose concentration?
- Stomach
- Kidney
- Pancreas
- Liver
-
Which chemical bonds cross-link parallel cellulose chains to form strong microfibrils?
- Ionic bonds
- Hydrogen bonds
- Peptide bonds
- Disulfide bridges
-
Compared to amylopectin in starch, how is the structure of glycogen described?
- More highly branched
- Less highly branched
- Triple helix structure
- Unbranched straight chain
-
What feature provides high tensile strength in cellulose plant cell walls?
- Ester cross-links
- Hydrogen-bonded microfibrils
- Coiled alpha-glucose chains
- Branched polymer chains
-
How many glycosidic bonds are broken to completely hydrolyse a 1000-monomer starch chain into glucose?
- 999
- 1000
- 998
- 500
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