AQA A Level Biology复习笔记4.3.3 Meiosis
Meiosis Meiosis produces daughter cells that are genetically different from each other and to the parent cell This is due to the processes of independent assortment and crossing over Indepen...
AQA A Level Biology复习笔记4.3.2 Mutations in Chromosome Number
Mutations in Chromosome Number Mutations can occur at different levels Non-disjunction occurs when chromosomes fail to separate during meiosis This occurs spontaneously The gametes ma...
AQA A Level Biology复习笔记4.2.6 Nucleic Acid & Amino Acid Sequence Comparison
Relating Nucleic Acid & Amino Acid Sequences A triplet is a sequence of three DNA bases that codes for a specific amino acid A codon is a sequence of three mRNA bases that codes for a sp...
AQA A Level Biology复习笔记4.2.5 Translation
Translation 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 (prote...
AQA A Level Biology复习笔记4.2.4 Eukaryotic Transcription
Eukaryotic Transcription The genome within eukaryotic cells contains many non-coding sections Non-coding DNA can be found: Between genes, as non-coding multiple repeats Within genes, as intr...
AQA A Level Biology复习笔记4.2.3 Transcription
Transcription 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 (pro...
AQA A Level Biology复习笔记4.2.2 The Structure of RNA
The Structure of mRNA and tRNA Like DNA, the nucleic acid RNA (ribonucleic acid) is a polynucleotide – it is made up of many nucleotides linked together in a long chain Like DNA, RNA nucleot...
Edexcel IGCSE Maths 复习笔记 4.9.2 3D Pythagoras & SOHCAHTOA
Edexcel IGCSE Maths 复习笔记 4.9.2 3D Pythagoras & SOHCAHTOA What are Pythagoras & SOHCAHTOA? Pythagoras’ Theorem helps us find missing side lengths of a right-angled triangle It is also fr...
Edexcel IGCSE Maths 复习笔记 4.9.1 SOHCAHTOA
Edexcel IGCSE Maths 复习笔记 4.9.1 SOHCAHTOA What is SOHCAHTOA? SOHCAHTOA is a mnemonic – ie a way to remember the 3 important formulas for sin (sine), cos (cosine), and tan (tangent) In a right-an...
