IGCSE Biology - 3b Inheritance - DNA and Genes

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New Edexcel IGCSE 9-1 4BI1 syllabus for 2017 first examined in 2019


Section 3b Inheritance - DNA and Genes


  • 3.14 understand that the genome is the entire DNA of an organism and that a gene is a section of a molecule of DNA that codes for a specific protein
  • 3.15 understand that the nucleus of a cell contains chromosomes on which genes are located
  • 3.16B describe a DNA molecule as two strands coiled to form a double helix, the strands being linked by a series of paired bases: adenine (A) with thymine (T), and cytosine (C) with guanine (G)
  • 3.17B understand that an RNA molecule is single stranded and contains uracil (U) instead of thymine (T)
  • 3.18B describe the stages of protein synthesis including transcription andtranslation, including the role of mRNA, ribosomes, tRNA, codons and anticodons


New and updated resource for IGCSE 9-1- More practical pages, updated design, concept checker and exam style question for each topic.