Edexcel IGCSE Maths 復(fù)習(xí)筆記 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...
Edexcel IGCSE Maths 復(fù)習(xí)筆記 4.2.1 Angles in Polygons What is a polygon? A?polygon?is a flat (plane) shape with n straight sidesFor example: A triangle is a polygon with 3 sidesA quadrilateral poly...
Tracer & Ringing Experiments Tracer and ringing experiments have been used to investigate mass transport in plants It is described as a ringing experiment because it involves the?removal...
Evaluating Data Linked to Mass Flow Hypothesis The mechanism of transport that occurs within the phloem is still debated by scientists The mass flow hypothesis suggests that there is a trans...
