IB DP Biology: HL復(fù)習(xí)筆記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成績已公布！CB官網(wǎng)公布美國TOP30大學(xué)最新AP換學(xué)分要求！
2022年AP考試成績于7月5日美東時間8:00公布，不知道各位同學(xué)今年發(fā)揮得如何呢？眾所周知，AP分數(shù)不僅可以用來作為申請大學(xué)的依據(jù)，還可以用來兌換未來的大學(xué)學(xué)分。隨著今年AP分數(shù)的發(fā)布，也有不少同學(xué)們對于AP換...
IB DP Biology: HL復(fù)習(xí)筆記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復(fù)習(xí)筆記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復(fù)習(xí)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(fù)習(xí)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(shù)據(jù)統(tǒng)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(xué)生最常選的科目有數(shù)學(xué)、進階數(shù)學(xué)、物理、化學(xué)、經(jīng)濟、生物這6門課程。 這些科目屬于基礎(chǔ)學(xué)科，不僅學(xué)術(shù)性強，更能考察學(xué)生的學(xué)習(xí)能力和邏輯思維能力，因此也備受各大高...
IB DP Biology: HL復(fù)習(xí)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(fù)習(xí)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...
