Strand 1: Organisation of Life
Free Leaving Cert Biology notes for Strand 1: Organisation of Life. Browse 8 topics and read online without an account.
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1.1 Characteristics of LifeBiology is the study of life, but defining what constitutes a living thing is a central challenge in science.1.1 Viruses, Classification and the Domains of LifeLiving organisms share eleven fundamental characteristics, yet viruses sit directly on the boundary between cellular life and inert chemistry.1.2 Chemicals of Life: BiomoleculesMetabolism is the sum of all chemical reactions taking place inside a living organism. These reactions are grouped into two pathways:1.2 DNA, RNA and the Genetic CodeNucleic acids store and express genetic information. The monomer unit of a nucleic acid is a nucleotide, which consists of three parts: 1.1.2 Transfer MoleculesMetabolism is simply the sum of all chemical reactions taking place inside a living organism. In a cell, these reactions never run in total isolation.1.3 Unit of Life: CellsCell theory forms the bedrock of biology and rests on three core principles: All living organisms are composed of one or more cells.1.4 Information of Life: Genetic InheritanceYou have two copies of most genes, one inherited from each parent. The different versions of a gene are called alleles.1.5 Origins of Life: EvolutionWithin any population, individuals differ. Some of those differences are inherited.
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