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WorksheetsRecall - Grade 10
Total questions: 20
Worksheet time: 20mins
Which carbohydrate is made of α-glucose monomers with 1,4 and 1,6 glycosidic bonds?
Cellulose
Amylose
Amylopectin
Maltose
What gives cellulose its high tensile strength?
Ionic bonds within glucose molecules
Hydrogen bonds between adjacent cellulose chains
Peptide bonds between monomers
Ester bonds within microfibrils
Which bond is formed during the condensation of two monosaccharides?
Peptide bond
Ester bond
Glycosidic bond
Hydrogen bond
A positive Benedict’s test indicates the presence of:
Starch
Protein
Lipid
Reducing sugar
Which observation indicates the presence of protein in a food test?
Brick-red precipitate
Purple colour
Blue-black colour
Cloudy solution
Which statement about phospholipids in a cell surface membrane is correct?
Hydrophilic heads face inwards
Hydrophobic tails face each other
Phospholipids make the membrane rigid
All polar heads face the cytoplasm
Which structure is present in plant cells but absent in animal cells?
Ribosome
Mitochondrion
Cell wall
Nucleus
Which structure is absent in prokaryotic cells?
Ribosome
Cell surface membrane
Cell wall
Nucleus
Which organelle increases in number in muscle cells after endurance training?
Lysosome
Mitochondrion
Golgi apparatus
Rough endoplasmic reticulum
Which products are formed when a triglyceride is hydrolysed?
Amino acids only
Fatty acids and glycerol
Glucose only
Fatty acids and amino acids
Which fatty acid would have the lowest melting point?
Long-chain saturated
Short-chain saturated
Long-chain unsaturated
Short-chain unsaturated
Which bond joins fatty acids to glycerol in a triglyceride?
Glycosidic bond
Peptide bond
Hydrogen bond
Ester bond
Which level of protein structure is maintained by hydrogen bonds and ionic bonds?
Primary
Secondary
Tertiary
Quaternary
Why is haemoglobin described as having a quaternary structure?
It is made of one polypeptide chain
It contains four polypeptide subunits
It only has alpha helices
It has peptide bonds only
Which part of an amino acid is different in different amino acids?
Amino group
Carboxyl group
R group
Peptide bond
Why does amylase not catalyse the breakdown of hydrogen peroxide?
The enzyme is denatured
The active site is not complementary to the substrate
The temperature is too low
The pH is too high
How does an enzyme increase the rate of a reaction?
Increases kinetic energy of substrate molecules
Lowers the activation energy
Increases substrate concentration
Changes the final products
Which microscope provides the highest resolution?
Light microscope
Stereo microscope
Transmission electron microscope
Hand lens
Which carbohydrate is not a sugar but is found in plant cells?
Glucose
Sucrose
Fructose
Starch
Which statement correctly describes cellulose?
A branched polymer of α-glucose
An unbranched polymer of β-glucose
A polymer of amino acids
A lipid-based macromolecule
