AQA A Level Biology復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)筆記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...
AQA A Level Biology復(fù)習(xí)筆記4.1.7 Non-Coding DNA
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, ...
2023英國(guó)大學(xué)本土排名CUG TOP20院校A-Level成績(jī)及雅思要求
6月14日，全英三大權(quán)威排名之一的完全大學(xué)指南CUG（Complete University Guide）發(fā)布了2023年英國(guó)大學(xué)排名榜單！作為專注于本土大學(xué)的英國(guó)榜單，此次排名共有130所大學(xué)上榜，涵蓋了74個(gè)專業(yè)領(lǐng)域。 2023CUG排名亮...
