Lesson 4.6.2
4.6.2 Sustainability of plant fibres and starch Quiz: Pearson Edexcel Biology, Unit 4
20 questions
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Lesson 4.6.2, Sustainability of plant fibres and starch: 20 multiple choice questions for the Pearson Edexcel Biology (9BI0), Unit 4: Biodiversity and Natural Resources, written with Revision Ninja.
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The 20 questions
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Why are plant fibres like flax considered sustainable alternatives to synthetic polymers?
- They produce toxics
- They are renewable
- They use oil
- They are non-renewable
-
What is the main principle of sustainable resource management?
- Preserving future resources
- Maximising short-term waste
- Using fossil fuels
- Ignoring future needs
-
Why does replacing oil-based plastics with plant starch reduce net carbon dioxide emissions?
- Photosynthesis absorbs CO2
- Fermentation releases oxygen
- Combustion absorbs CO2
- Plastics absorb CO2
-
What is a major limitation of growing crops for plant-based plastics?
- Lower production costs
- Land use competition
- Increased carbon storage
- Infinite raw materials
-
How do starch bioplastics differ fundamentally from conventional oil-based plastics?
- Indestructible in landfill
- Derived from petroleum
- Completely heat resistant
- Decomposed by microorganisms
-
Why are cellulose-rich plant fibres added to matrix materials to make composites?
- They absorb water
- They add strength
- They increase mass
- They reduce flexibility
-
Which method best assesses the overall environmental impact of a material from production to disposal?
- Tensile strength testing
- Cost-benefit analysis
- Life cycle analysis
- Mass spectrometer test
-
Which factor can significantly reduce the overall sustainability of a plant-based product?
- Biodegradable packaging use
- Local product sourcing
- Rapid crop growth
- Heavy fertiliser use
-
What is a potential consequence of using starch crops for bioplastic production?
- Reduced land usage
- Increased food prices
- Excess food production
- Decreased fertiliser demand
-
What property is shown by a plant fibre with a high tensile strength?
- Resists breaking force
- Absorbs water quickly
- Breaks under load
- Stretches very easily
-
Why do longer plant fibres typically break at a lower pulling force than shorter ones?
- More structural defects
- Higher cellulose content
- Lower water content
- Thicker cell walls
-
What is the main advantage of biodegradable packaging over conventional plastic in landfill?
- Prevents all decomposition
- Requires high heat
- Increases toxic leachate
- Reduces persistent waste
-
Why are plant products such as wood considered sustainable resources?
- They are non-biodegradable
- They store petroleum
- They are renewable
- They are finite
-
Which property makes plant-based starch packaging environmentally beneficial?
- Biodegradability
- Toxicity
- Insolubility
- Impermeability
-
What process evaluates the total environmental impact of a product from raw material to disposal?
- Carbon offsetting
- Life cycle assessment
- Ecosystem valuation
- Sustainability auditing
-
Which non-renewable resource can plant starch replace in the manufacture of plastics?
- Crude oil
- Limestone
- Natural gas
- Coal
-
What main advantage do plant fibres have over synthetic polyester fibres?
- They are stronger
- They are waterproof
- They are renewable
- They cost less
-
What is a major environmental concern associated with growing crops for bioplastics?
- Increased oil consumption
- High ozone depletion
- Land use competition
- Radioactive waste
-
Starch used to make bioplastic is a polymer of which monomer?
- Amino acid
- Alpha-glucose
- Beta-glucose
- Fructose
-
Which group of organisms breaks down compostable bioplastics in the environment?
- Parasites
- Herbivores
- Decomposers
- Autotrophs
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