2022年AP成绩已公布！CB官网公布美国TOP30大学最新AP换学分要求！
2022年AP考试成绩于7月5日美东时间8:00公布，不知道各位同学今年发挥得如何呢？众所周知，AP分数不仅可以用来作为申请大学的依据，还可以用来兑换未来的大学学分。随着今年AP分数的发布，也有不少同学们对于AP换...
IB DP Biology: HL复习笔记7.2.5 Skills: Analysing DNA Methylation Patterns
Skills: Analysing DNA Methylation Patterns Methylation of DNA Methyl groups (-CH3) can be directly added to DNA to change the activity of a gene DNA methylation commonly involves the direct additio...
IB DP Biology: HL复习笔记7.2.4 Post-transcriptional Modification
Modification of RNA In all kingdoms of life, gene expression can be regulated after an mRNA transcript has been produced Post-transcriptional modification of mRNA Helps prevent degradation mRNA is ...
IB DP Biology: HL复习笔记7.2.3 Transcription
Nucleosomes Regulate Transcription Nucleosomes are the structural unit of DNA packaging in eukaryotes that facilitate supercoiling Within a nucleosome, DNA is wrapped around proteins called histone...
IB DP Biology: HL复习笔记7.2.2 Environment & Gene Expression
Environment & Gene Expression Environment and Gene Expression An organism’s internal or external environment can influence gene expression patterns The levels of regulatory proteins or transcri...
CAIE考试局A-Level近四年A和A*率数据统计！六大科目难度如何？
A-Level总共有70多门科目。一般来说，中国学生最常选的科目有数学、进阶数学、物理、化学、经济、生物这6门课程。 这些科目属于基础学科，不仅学术性强，更能考察学生的学习能力和逻辑思维能力，因此也备受各大高...
IB DP Biology: HL复习笔记7.2.1 Regulation of Gene Expression by Proteins
The Promoter Region The function of the promoter Only some DNA sequences code for the production of polypeptides, these are called coding sequences Non-coding sequences produce functional RNA molec...
IB DP Biology: HL复习笔记7.1.6 Skills: Nucleosomes & Molecular Visualisation Software
Skills: Nucleosomes & Molecular Visualisation Software Molecular visualisation software can be used to help understand molecular structures Macromolecules like protein, DNA, RNA and complex car...
IB DP Biology: HL复习笔记7.1.5 Skills: The Hershey & Chase Experiment
Skills: The Hershey & Chase Experiment Which Biomolecule is the Heritable Material? DNA was identified in 1869 but many scientists assumed that protein was the heritable material owing to the f...
