Edexcel IGCSE Maths 复习笔记 4.4.2 Speed, Density & Pressure - Harder What are speed, density and pressure? Speed, density and pressure are compound measures – they are made from other measures...
Non-Coding DNA The genome within eukaryotic cells contains many non-coding sections of DNA Non-coding DNA does not code for any amino acids Non-coding DNA can be found between genes, ...
Edexcel IGCSE Maths 复习笔记 4.4.1 Speed, Density & Pressure What connects speed, density & pressure? Speed, density and pressure are all examples of variables which are calculated by divid...
Edexcel IGCSE Maths 复习笔记 4.3.1 Bearings & Scale What are bearings? Bearings (sometimes referred to as three-figure bearings) are a way of describing and using angles The way they are define...
The Triplet Code A gene is a sequence of nucleotide bases in a DNA molecule that codes for the production of a specific sequence of amino acids, that in turn make up a specific polypeptide (...
Genetic Loci Genes, loci and alleles The DNA contained within chromosomes is essential for cell survival Every chromosome consists of a long DNA molecule that codes for several different pro...
The Definition of a Gene A gene is a base sequence of DNA that codes for the amino acid sequence of a polypeptide or a functional RNA molecule Functional RNA molecules are required for prote...
Mitochondria & Chloroplast DNA Mitochondria A single mitochondrion is shown – the inner membrane has protein complexes vital for the later stages of aerobic respiration embedded within i...
Chromosome Structure Chromosomes are made of one very long, condensed DNA molecule associated with proteins (in eukaryotic cells) The main proteins present are the large positively charged g...
