AQA Biology Unit 5

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1. Define Tropism

  • A movement that bares some relationship to the location of the stimulus
  • A growth movement of part of a plant in response to a directional stimulus
  • Random movement in response to a stimulus
  • Muscular Contractions
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2. What is an antigen?

  • A protein on the surface of a cell
  • I came here for unit 5 and do not remember the answer for this question, I mean who cares if this is a synoptic unit with a big essay question at the end
  • A protein on the cell surface membrane triggering an immune response
  • A pathogen

3. Where are adult stem cells found?

  • Pituitary Glands
  • Bone marrow
  • Testes
  • Lungs
  • Ovaries

4. What is the role of troponin?

  • To bind to Calcuim ions causing tropmyosin to move, exposing actin binding sites
  • To bind to tropmyosin
  • To form a cross bridge between myosin and troponin
  • To activate ATPase

5. Define degenerate

  • A codon can be coded for by more than one triplet
  • An amino acid can be coded for by more than one triplet
  • Lots of amino acids code for a triplet
  • Multiple codons code for a triplet code

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Indiaistrying

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sass master, good quiz though thank you

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