A-LevelBiologyNucleic acids and protein synthesisMay/June 2020Paper 4 Q511 Marks
Yeast cells respond to changes in glucose concentration in their environment by using transcription factors to switch off genes. When glucose is present: Mig1 transcription factors bind to the promoters of five genes Mig1 binding to the promoters stops (represses) transcription of these genes. The genes that are repressed by Mig1 code for five enzymes that allow yeast cells to metabolise the sugar galactose when glucose is absent.
✓ Correct Answer
The correct answer is —. This question tests the candidate's understanding of nucleic acids and protein synthesis within the Biologysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep