IB DP Biology: HL复习笔记7.3.2 Ribosomes
Structure of Ribosomes Ribosomes are found in cells Either freely in the cytoplasm (of all cells) Or bound to the endoplasmic reticulum (ER) to form rough ER (only in eukaryotic cells) Ribosomes ar...
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...
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...
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...
