A Level · Biology
35+ A Level Molecular genetics Practice Questions for 2026 (based on Singapore MOE Syllabus)
A Level H2 molecular genetics covers DNA structure, replication, transcription, translation, and gene regulation. This page has 35+ exam-style questions with full solutions for 2026 Singapore A Level.
35 free sample questions below — answers and step-by-step solutions included.
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These 35 questions are a sample. On Tutorly.sg/app you can practise unlimited A Level Biology questions, get instant explanations after you try, and use past-year papers — no sign-up needed to start.
- ✓ Unlimited practice questions (not just 10)
- ✓ Step-by-step working when you are stuck
- ✓ Singapore syllabus: A Level
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- Question 1easy
- Question 2easy
- Question 3medium
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- Question 8medium
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- Question 11easy
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- Question 13medium
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- Question 18medium
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- Question 21easy
- Question 22medium
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- Question 26easy
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- Question 28medium
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- Question 31easy
- Question 32medium
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- Question 35medium
Frequently asked questions
- What is the central dogma in H2 Biology?
- DNA → RNA (transcription) → protein (translation). DNA replication is semi-conservative. Know the enzymes (DNA polymerase, RNA polymerase, ribosomes) and where each process occurs.
- How do I answer molecular genetics diagram questions?
- Label 5' and 3' ends, show complementary base pairing, indicate enzyme action, and state the cellular location (nucleus vs cytoplasm). Use correct terminology (template vs coding strand).
- What are common H2 molecular genetics mistakes?
- Confusing mRNA with tRNA roles, wrong base pairing (A-T, G-C for DNA; A-U for RNA), and omitting post-transcriptional modifications. Practise drawing replication forks and transcription units.
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Free on Tutorly.sg
Want more Molecular genetics questions — with step-by-step help?
These 35 questions are a sample. On Tutorly.sg/app you can practise unlimited A Level Biology questions, get instant explanations after you try, and use past-year papers — no sign-up needed to start.
- ✓ Unlimited practice questions (not just 10)
- ✓ Step-by-step working when you are stuck
- ✓ Singapore syllabus: A Level
Opens tutorly.sg/app — same subject ready for you.
Study this topic in depth
Notes, worked examples, common mistakes, and exam tips for Molecular genetics.
JC H2 Biology — Molecular Genetics hub →