A-Level Biology - A-Level Biology - Genetic Code | How DNA Packs into Chromosomes | Codon Tables (2026/27 exams)

⭐️ Check out our website https://www.cognito.org/ ⭐️ *** WHAT'S COVERED *** 1. How DNA is organised in cells * DNA packaging into chromosomes using histones. * The definitions of genes, the genome, and the proteome. * The difference between coding sections (exons) and non-coding sections (introns). 2. The differences between DNA in eukaryotes and prokaryotes * A comparison of DNA location, structure, association with histones, and presence of introns. * A note on the DNA found in mitochondria and chloroplasts. 3. The definition and features of the genetic code * The genetic code as a sequence of bases that determines the amino acid sequence. * The four main features: triplet, universal, non-overlapping, and degenerate. 4. How to interpret codon tables * A worked example showing how to convert a DNA sequence to an mRNA sequence and then determine the corresponding amino acid sequence using a codon table. *** CHAPTERS *** 0:00 Introduction 0:28 How DNA is Organised in Cells 2:30 DNA in Eukaryotes & Prokaryotes 4:09 What is the Genetic Code? 6:07 How to Interpret Codon Tables *** PLAYLISTS *** https://youtube.com/playlist?list=PLidqqIGKox7VzYfPIVt8T09xOLNcolCe4&si=8JmDajxjtba6rdc3 https://youtube.com/playlist?list=PLidqqIGKox7UZ3mWhbHv2aA_1vnbsfRPq&si=q3hEKdA4v7kbfwMe https://youtube.com/playlist?list=PLidqqIGKox7XPh1QacLRiKto_UlnRIEVh&si=orIUwL3o2jOoiYjT https://youtube.com/playlist?list=PLidqqIGKox7X5UFT-expKIuR-i-BN3Q1g&si=DcihOwUkd9oWbbdp https://youtube.com/playlist?list=PLidqqIGKox7WeOKVGHxcd69kKqtwrKl8W&si=Y8MsO-FK948jnxpS https://youtube.com/playlist?list=PLidqqIGKox7UVC-8WC9djoeBzwxPeXph7&si=-7i5Iq7yOeJrhtu6 https://youtube.com/playlist?list=PLidqqIGKox7VKJD2WxRhoKaI6JGLVean8&si=NH_Q1ujhVgACM2FU #Alevel #Biology #study #revision #school #exam #AQA #OCR #Edexcel #IGCSE #IB #AP