A gene is a length of DNA that contains coded information to make a polypeptide and functional RNA such as tRNA and ribosomal RNA.The information is in the form of a sequence of bases on the DNA.A sequence of three bases determines the amino-acid to be incorporated into a polypeptide chain.Proteins are a group of macromolecules that include enzymes. Enzymes catalyse most metabolic reactions and control the way an organism develops.In this way genes in conjunction with the environment of an organism determines the organisms development.Chromosomes are collections of genes on a contiguous length of DNA associated with proteins.Each gene is in a specific locus or position on a chromosome so genes are inherited by the offspring in identical locations.
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Specification: AQA Biology (7401), AS-level, 3.4.1 DNA, genes and chromosomes. Topic: DNA, Genes and Protein Synthesis.
More in DNA, Genes and Protein Synthesis
- The Genetic Code
- Features of the Genetic Code
- Chromosomes
- Homologous Chromosomes
- Alleles
- The Human Karyotype
- Protein Synthesis
- RNA
All 15 lessons in DNA, Genes and Protein Synthesis · All AQA AS-level Biology topics