Grade 12 Life Science | Paper 2 Exam Revision | DNA, RNA & Protein Synthesis (CAPS/NSC)

Master DNA, RNA and Protein Synthesis for Grade 12 CAPS or NSC — Paper 2 Genetics. Clear notes, clean diagrams, codon-table practice, and memo keywords to bank marks 🧬📚🚀

▶️ Grade 12 Life Sciences Playlist: https://www.youtube.com/playlist?list=PLdW8yBAYFaIhoHpt5OZ8uPKhrYuJkpTY4

What you will learn

🧬 DNA and RNA basics: nucleotide structure, base pairing rules A-T and A-U, antiparallel strands, DNA vs RNA table

🔁 DNA replication: semi-conservative model, enzymes helicase and DNA polymerase, leading vs lagging strand, replication fork

✍️ Transcription: DNA template → pre-mRNA in nucleus, RNA polymerase, complementary base pairing, mRNA editing basics

🧫 Translation: mRNA → polypeptide at ribosome, tRNA anticodons, peptide bond formation, start and stop codons

🧪 Using the codon table: read mRNA codons, not DNA or anticodons; quick steps to convert DNA to mRNA to amino acids

⚠️ Mutations and effects: substitution, insertion, deletion, frameshift; missense, nonsense, silent; protein function consequences

🌍 Applications and examples: sickle cell mutation and selection, lactose persistence, antibiotic resistance analogy

📝 Memo keywords: nucleotide, base pairing, semi-conservative replication, transcription, translation, codon, anticodon, peptide bond, frameshift, missense, nonsense

Exam technique — Paper 2

Show full working: DNA → mRNA → tRNA anticodon → amino acid sequence

Label directions where relevant: 5 prime to 3 prime

In mutation questions: name the mutation type, show before and after sequence, state protein effect

Codon table: always cite the mRNA codon; underline the start codon and circle any stop codon

For data questions: quote numbers or positions, then conclude with a clear statement that links to the hypothesis

How to use this video
Watch the lesson ▶️, pause at each question ⏸️, answer first ✍️, then mark with our checklist ✅ to maximise your score.

Hashtags

#Matric #Grade12 #LifeSciences #CAPS #NSC #MatricRevision #Paper2 #Genetics #DNA #RNA #ProteinSynthesis #Transcription #Translation #Mutations #ExamTips #PastPapers #Matric2025 #Matric2026

Tags

Matric Life Sciences, Grade 12 Life Sciences, Life Sciences CAPS, NSC Life Sciences, Paper 2 Genetics, DNA and RNA Grade 12, DNA replication, Transcription and translation, Codon table practice, Anticodon, Amino acids, Mutations Grade 12, Frameshift mutation, Missense mutation, Nonsense mutation, Protein structure and function, Scientific investigations genetics, Exam tips Life Sciences, Past papers Life Sciences

Видео Grade 12 Life Science | Paper 2 Exam Revision | DNA, RNA & Protein Synthesis (CAPS/NSC) канала Life Science and Geography (CAPS)