Biology A (Salters-Nuffield) A-Level
TIR1
What TIR1 means in Biology A (Salters-Nuffield) A-Level, as defined for Pearson Edexcel.
Definition of TIR1
Check what you remember
Read the wording for your board, then hide it and explain TIR1 in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: Pearson Edexcel
A receptor that IAA binds to, leading to changes in transcription factors that switch genes for cell elongation, division and differentiation on or off.
Topics that use TIR1
- Topic 8: Grey Matter (Pearson Edexcel A-Level)
Related terms
- Animal experiments
- Animal models in neuroscience research
- Antagonistic muscle action
- Autonomic control of the pupil
- Benefits
- Cell signalling
- Cerebral hemispheres
- Co-ordination
Using TIR1 in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
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