A2 Biology Unit 4 ( EDEXCEL ) 39 Questions

I have created a quiz on Unit 4 of Edexcel Biology (A2). Please excuse any spelling mistakes, I've done my best to spell everything write, but feel free to message me if you spot one. I have checked and checked the questions and answer but there are a lot there so if you do find one that you think is incorrect please let me know immediatly so I can change it. I hope it helps, even if its just a little bit. 

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  • Created by: Holly
  • Created on: 06-12-12 12:21

1. HIV targets which cells

  • CD3+ T-Lymphocytes
  • CD4+ T-Lymphocytes
  • CD4+ B-Lymphocytes
1 of 20

Other questions in this quiz

2. Infection of mast cells cause a release of

  • Antigens
  • Antibodies
  • Histamine
  • Antihistamine

3. Eagle, Flamingo, Algae, Shrimp, which is the secondary consumer

  • None
  • Shrimp
  • Eagle
  • Flamingo
  • Algae

4. What does the phrase 'non-overlapping' refer to?

  • The triplet codons do not overlap
  • The specific and non specific immune response do not overlap
  • The amino acids have more than one codon

5. Allopatric speciation relies on

  • Physical barriers (e.g. mountains)
  • Physical incompatibility
  • Species not responding to others coutships



Will not load results, other quiz's do but not this one. Good questions, though


I was waiting for my results for around 3 minutes then I decided to leave it then just saw that comment. Thanks


yea same ^ annoying

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