QUESTION 1 / 20 · DNA & GENESEasy
In DNA, adenine (A) always pairs with…
GENE TRANSLATOR
Mutate a gene, see the protein change
The DNA is copied into mRNA, then read three letters (one codon) at a time to pick each amino acid. Click any DNA base to select it, then swap, insert or delete a base and compare the protein with the original.
DNAmRNAProtein
AUGMet
GUGVal
CAUHis
CUGLeu
ACUThr
CCUPro
GAGGlu
GAGGlu
AAGLys
UCUSer
GCCAla
Base 20 (A): change to
MUTATION TYPENo mutationThis is the start of the human β-globin gene. To make the sickle-cell mutation, select the A in codon 7 (GAG, glutamate) and change it to T, making GTG (valine).
ORIGINAL PROTEINMet–Val–His–Leu–Thr–Pro–Glu–Glu–Lys–Ser–AlaYOURSMet–Val–His–Leu–Thr–Pro–Glu–Glu–Lys–Ser–Ala
HydrophobicPolarPositive chargeNegative chargeGlycineStop
What this molecular biology test covers, in short
Twenty multiple-choice questions at upper-secondary to first-year university level, four on each of five topics: DNA and genes, replication, transcription and translation, mutation, and gene regulation and biotechnology.
The translator uses the standard genetic code and the real opening of the human β-globin gene (HBB). This test is our own and not normed.
By What's Your IQ · Reviewed 5 Oct 2026- Format
- 20 multiple-choice questions
- Level
- A-level / AP to first-year
- Bonus
- DNA → mRNA → protein translator with mutations
- Milestone
- Double helix, 1953