IB DP Biology: HL复习笔记7.3.1 Translation
Initiation of Translation Initiation of translation involves assembly of the components that carry out the process. During translation, the specific sequence of messenger RNA (mRNA) is translated t...
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...
IB DP Biology: HL复习笔记7.1.4 DNA Sequencing
DNA Sequencing Application: Use of nucleotides containing dideoxyribonucleic acid to stop DNA replication in preparation of samples for base sequencing DNA sequencing allows for the nucleotide base...
IB DP Biology: HL复习笔记7.1.3 Non-coding DNA
Non-coding Regions of DNA DNA molecules are very long but only certain regions code for the production of polypeptides These are called coding sequences In humans only 1.5% of the genome contains c...
