DNA Structure, DNA Replication, Transcription, Translation Core 3.3, 3.4, 3.5; AHL 7.1, 7.2, 7.3, 7.4
An Animal Cell
Different levels of DNA condensation (1)DNA Double Helix (2)Chromatin strand (DNA with histones) (3)Chromatin during interphase with centromere (4)Condensed chromatin during prophase (Two copies of the DNA molecule are now present) (1)Chromosome during metaphase.
Deoxyribonucleic Acid A nucleotide, consisting of a phosphate group, sugar (ribose), and a nitrogenous base H
Deoxyribonucleic Acid A nucleotide, consisting of a phosphate group, sugar, and a nitrogenous base 4 Nitrogenous Bases of DNA H
Deoxyribonucleic Acid A nucleotide, consisting of a phosphate group, sugar, and a nitrogenous base Hydrogen-bond causes base-pairing A-T, C-G H
Deoxyribonucleic Acid H
7.1.1 Antiparallel strands
’-5’ linkages
7.1.1 Pyrimidines, Purines
7.1.2 (1)DNA Double Helix (2)Chromatin strand (DNA with histones) (3)Chromatin during interphase with centromere (4)Condensed chromatin during prophase (Two copies of the DNA molecule are now present) (1)Chromosome during metaphase.
7.1.2 Nucleosomes, Histone proteins Nucleosome – DNA wrapped around a histone core twice + the linkage DNA
(protein ball) (protein ‘clip’ to hold the DNA to the histone core)
3.4, 7.2
3.4, 7.2 DNA Replication
3.4.3 DNA Replication is SEMICONSERVATIVE
Transcription: DNA to RNA
RNA Ribonucleic Acid Different in the presence of Oxygen in 2’ position of the ribose
DNA vs RNA Double Strand Single Strand
DNA vs RNA Uracil (U) replaces Thymine (T)
DNA vs RNA
Transcription a.k.a Sense strand a.k.a Antisense strand
7.3.3
7.3.4 Eukaryotic RNA processing
Translation Ribosome – place where amino acids are joined to form polypeptide Transfer RNA (tRNA) carries specific amino acids to ribosome
Translation tRNA codon anticodon
Universal Genetic Code
Amino Acid
Protein Structure