NGSS.HS-ESS3-1 / AP.ENV.ENG.1✓ Kentucky Department of Education AlignedAcademic Year 2026–27
Molecular Genetics, DNA Replication & Protein Synthesis
Trace genetic flow: DNA double helix transcription into messenger RNA and translation at ribosomes into functional enzymes.
Why It Matters:Essential for CRISPR gene editing, mRNA vaccine design, and molecular oncology.
Curated Video Instruction
● Verified Active EmbedSTEP-BY-STEP PROOF
Worked Example
Transcribe DNA sequence 3'-TAC-CGA-TTC-5' into mRNA and translate into amino acids:
1
Transcribe template DNA into complementary mRNA
TAC -> AUG, CGA -> GCU, TTC -> AAG
Adenine pairs with Uracil; Cytosine pairs with Guanine.
2
Identify mRNA codons
5'-AUG-GCU-AAG-3'
Constructed transcript read in 5' to 3' direction.
3
Translate codons via genetic code
AUG (Methionine/Start) - GCU (Alanine) - AAG (Lysine)
Yields tripeptide chain.
✓Verification Check
Verify: Complementary base pairing rules A-U, C-G are preserved.
DNA bases: T-A-C
•
mRNA bases: A-U-G
⚠️ Common Pitfalls & Misconceptions
Using Thymine instead of Uracil in RNA transcripts
✗ Transcribing Adenine (A) in DNA to Thymine (T) in mRNA✓ RNA uses Uracil (U) in place of Thymine (T)
Thymine is exclusive to DNA.
INTERACTIVE DRILLS
Guided Practice
Practice Question1 of 1
Step-by-step Feedback
Which molecule carries genetic instructions from the nucleus to the ribosome?
MASTERY BENCHMARK
Official Assessment Quiz
Formal Assessment
Molecular Genetics, DNA Replication & Protein Synthesis
Passing Criteria:70% or higher
Question 1 of 1
What is the start codon in all eukaryotic protein translation?
Education to Career Navigation
Where This Lesson Leads
Molecular Biologists, Bioinformaticians, and Clinical Geneticists apply these mechanisms daily.