IB DP Biology: HL復習筆記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復習筆記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考試局A-Level近四年A和A*率數據統計！六大科目難度如何？
A-Level總共有70多門科目。一般來說，中國學生最常選的科目有數學、進階數學、物理、化學、經濟、生物這6門課程。 這些科目屬于基礎學科，不僅學術性強，更能考察學生的學習能力和邏輯思維能力，因此也備受各大高...
IB DP Biology: HL復習筆記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復習筆記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復習筆記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復習筆記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復習筆記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...
IB DP Biology: HL復習筆記7.1.2 Mechanism of DNA Replication
Leading Strand & Lagging Strand Double-stranded DNA consists of?two antiparallel strands?(oriented in opposite directions) During DNA replication, the two strands are ‘unzipped’ and DNA polymer...
