Use of Biological Resources

Worked examples (6)

• 1What 'yield' means (Getting started)
• 2How a glasshouse helps (Getting started)
• 3Reading a CO₂ graph (Building confidence)
• 4Mineral ions in fertiliser (Building confidence)
• 5Why too hot reduces yield (Stretch)
• 6Drawbacks of fertiliser (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Why farmers control pests (Getting started)
• 2What biological control means (Getting started)
• 3Advantages and disadvantages of pesticides (Building confidence)
• 4Why choose biological control (Building confidence)
• 5Compare pesticides and biological control (Stretch)
• 6Evaluate which method to use (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1What kind of organism yeast is (Getting started)
• 2Write the fermentation word equation (Getting started)
• 3Why bread dough rises (Building confidence)
• 4Why bread does not taste of alcohol (Building confidence)
• 5Same yeast, different useful product (Stretch)
• 6Effect of temperature on fermentation (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Products of anaerobic respiration in yeast (Getting started)
• 2Why a layer of oil is added (Getting started)
• 3Identify the variables (Building confidence)
• 4Interpret the temperature graph (Building confidence)
• 5Improve the accuracy of the experiment (Stretch)
• 6Plan a sugar-concentration investigation (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name the microorganism used (Getting started)
• 2What Lactobacillus produces (Getting started)
• 3Why the milk is cooled (Building confidence)
• 4Why the milk thickens (Building confidence)
• 5Why hygienic conditions are needed (Stretch)
• 6Describe the whole yoghurt-making process (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1What a fermenter is used for (Getting started)
• 2The job of the stirrer (Getting started)
• 3Why aseptic precautions are used (Building confidence)
• 4Why a cooling jacket is needed (Building confidence)
• 5Why the culture is stirred (Stretch)
• 6Explain why conditions must be controlled (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Name the cutting and joining enzymes (Getting started)
• 2What is a sticky end? (Getting started)
• 3Why the same restriction enzyme is used (Building confidence)
• 4The role of DNA ligase (Building confidence)
• 5Describe inserting a gene into a plasmid (Stretch)
• 6Predict the effect of using a different enzyme (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1Define selective breeding (Getting started)
• 2Plant vs animal examples (Getting started)
• 3Put the steps in order (Building confidence)
• 4Breeding cows for high milk yield (Building confidence)
• 5Breeding a disease-resistant crop (Stretch)
• 6Discuss the disadvantages (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1What genetic modification does (Getting started)
• 2Name the two types of vector (Getting started)
• 3Match the enzyme to its job (Building confidence)
• 4Order the genetic engineering steps (Building confidence)
• 5Describe how bacteria are engineered to make insulin (Stretch)
• 6Explain the role of the vector (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1What insulin treats and where it comes from (Getting started)
• 2Match the enzyme to its job (Getting started)
• 3Order the gene-transfer steps (Building confidence)
• 4Conditions inside the fermenter (Building confidence)
• 5Describe how human insulin is manufactured (Stretch)
• 6Advantages over animal insulin (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1What 'genetically modified' means (Getting started)
• 2How a Bt crop resists pests (Getting started)
• 3Golden rice and vitamin A (Building confidence)
• 4Drought and salt tolerance (Building confidence)
• 5Discuss the benefits and concerns of GM crops (Stretch)
• 6Why a herbicide-resistant crop gives a higher yield (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response

Worked examples (6)

• 1What 'transgenic' means (Getting started)
• 2An example of a transgenic organism (Getting started)
• 3How a transgenic organism is made (Building confidence)
• 4Transgenic vs selective breeding (Building confidence)
• 5Why bacteria are used to make human insulin (Stretch)
• 6Transgenic crops and selective breeding compared (Stretch)

Model answers (6)

• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style
• ✓Model answer — 4WSD0/1B style — extended open response
• ✓Model answer — 4WSD0/1B style — extended open response