5. Genetic Material

Genetic material DNA…RNA…Chromosomes

DNA IS THE HEREDITARY MOLECULE  Friedrich

Miescher to Hershey, Chase, Avery et

al  Characteristics and structure:  Antiparallelism  Complementary

base pairing  Primary, secondary and tertiary structure   

Nucleotide sequence A, B & Z DNA Supercoiling

Forms of dna

Forms of dna

BASE PAIRING  Non-conventional

pairing

Overview of Dna, rna & chromosomes  See

flash movie

Deoxyribonucleic Acid (DNA) and Ribonucleic Acid (RNA)

Nucleotide

Purine and Pyrimidine Bases in DNA and RNA

Deoxyribonucleotides

Ribonucleotides

Genetic Information Flow: DNA

RNA

Protein

Processes undergone by dna  Replication  Transcription  Translation

Replication, Transcription and Translation

Replication and transcription occur in the nucleus

Translation occurs in the cytoplasm

RNA  Types  Pre-mRNA  mRNA  tRNA  rRNA  Small

interfering RNA’s

CHROMOSOMES  Parts:  Centromere  Telomere  Short

arm  Long arm

CHROMOSOMES  Metacentric  Acrocentric  Telocentric

CHROMOSOMES  G-banding  Karyotyping