AQA Biology Unit 5

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1. Define Taxis

  • Random movement in response to a stimulus
  • The growth of a plant in response to a directional stimulus
  • A movement that bares some relationship to the location of the stimulus
  • Movement towards sunlight for photosynthesis
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2. What is meant by homeostasis?

  • How kidneys work
  • Maintaining a constant internal environment
  • Maintaining a constant external environment
  • Chemical reactions

3. Name the enzyme used to convert mRNA into cDNA

  • RNA Polymerase
  • Restriction Endonuclease
  • Reverse Transcriptase
  • DNA Ligase

4. What is the role of troponin?

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

5. What is the role of RNA polymerase in transcription?

  • Join DNA nucleotides together to form a strand with hydrogen bonds
  • Join DNA nucleotides together to form a strand with phosphodiester bonds
  • Join RNA nucleotides together to form a strand with phosphodiester bonds
  • Join RNA nucleotides together to form a strand with hydrogen bonds

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Indiaistrying

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sass master, good quiz though thank you

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