Gene Expression
Transcription, RNA processing, translation, alternative splicing, protein folding and the link from expressed genes to phenotype.
How to study Higher Biology
Move from accurate biological mechanisms to unfamiliar data, experimental evidence and justified conclusions. Use current official materials for the written, extended-response and controlled-assignment formats that this question bank does not reproduce.
Core concepts
Concept 1
Trace information from DNA through a primary transcript and mature mRNA to a polypeptide.
Exam cue: Trace information from DNA through a primary transcript and mature mRNA to a polypeptide.
Concept 2
Distinguish mRNA, tRNA and rRNA roles during transcription and translation.
Exam cue: Distinguish mRNA, tRNA and rRNA roles during transcription and translation.
Concept 3
Explain how RNA splicing and protein folding allow sequence information to produce varied functional proteins.
Exam cue: Explain how RNA splicing and protein folding allow sequence information to produce varied functional proteins.
Risk pitfalls and guardrails
Introns are removed and exons are retained in a mature transcript.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
An anticodon is carried by tRNA; a codon is read on mRNA.
Guardrail: Check vocabulary, sequence, direction, compartment, units and whether the evidence supports causation or only an association.
Memory anchors
Three RNAs
mRNA carries, tRNA transfers, rRNA forms the ribosome.
Expression route
Transcribe, splice, translate, fold.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Which sequence correctly describes the flow of information during expression of a protein-coding gene?
What is the role of RNA polymerase in transcription?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
What is Pass Harbor?
Completely free exam prep for 247 UK exams.
- Practice questions
- Flashcards
- Study guides
- Mock exams
- No registration
- No paywall
- Start instantly
“No more expensive exam prep. Quality study tools should be accessible to everyone.”