B3 Exam Questions edexcel

"Explain what is meant by the term ‘anthropomorphic’" (2)

• Give a definition:

Giving animals/non-human objects human characteristics:

• Give an example:

Cartoon animals speaking/driving. 

"Suggest two reasons why humans keep animals as pets" (2)

Any two of:

• Companionship / Entertainment
• Reduce stress / Health benefits 
• Protection
• Assist with work
• Status
• Products eg eggs, milk.

What is the natural source of quinine? (1)

• The bark of the cinchona tree

Suggest one reason why plant extracts are carefully tested before use on humans. (1)

One of:

• May be toxic
• May have side-effects
• Could be harmful
• May cause allergic reactions
• To test if it is effective 

Describe some ways that the supply of artemisinin could be increased. (3)

Any three from:

• Grow more Artemisia 
• Use genes from Artemisia to genetically modify other plants
• GM/ selectively breed Artemisia to increase concentration of Artemisinin/ grow faster
• Improve efficiency of extraction technique
• use GM micro organisms to produce Artemisinin
• Tissue Cluture
• use of transgenic animals

Describe the stages in the production of soy sauce (4 marks)

Any four in the correct sequence from:

• cook soya bean;
• mix with (ground) roasted wheat;
• ferment with Aspergillus ;
• brine is added;
• yeast and/or Lactobacillus added;
• second fermentation/refermentation;
• filtered;
• pasteurisation;
• use sterile bottle;

Explain how prebiotics benefit the human body. (3)

• Increase/stimulate the growth of (friendly) bacteria;
• Decrease the growth of bad bacteria;
• Health benefits related to above e.g reduction of toxins from bad bacteria/increasing B vitamins from good bacteria;