IB DP Biology: SL復(fù)習(xí)筆記2.6.1 Transcription
Transcription This process of protein synthesis occurs in?two stages: Transcription?–?DNA?is transcribed and an?mRNA?molecule is produced mRNA is a single stranded RNA molecule that transfers the i...
IB DP Biology: SL復(fù)習(xí)筆記2.5.3 Skills: DNA Replication
Meselson & Stahl's Experiments Analysis of Meselson and Stahl’s results to obtain support for the theory of semi-conservative replication of DNA Crick and Watson, as they defined the shape of D...
IB DP Biology: SL復(fù)習(xí)筆記2.5.2 DNA Replication
DNA Replication The replication of DNA is semi-conservative and depends on complementary base pairing Semi-conservative means that?one strand of the 'parent' DNA is kept?in the 'daughter' molecule ...
IB DP Biology: SL復(fù)習(xí)筆記2.5.1 DNA & RNA Structure
Nucleic Acids: Structure The nucleic acids DNA and RNA are polymers of nucleotides Both DNA and RNA are?polymers?that are made up of?many repeating units?called?nucleotides Each nucleotide is forme...
如何寫A-Level經(jīng)濟學(xué)大作文？
在A-Level經(jīng)濟學(xué)考試中，最難的部分非essay question莫屬！這不僅因為題目多變的提問方式，也因為考官對于考生的高要求。很多學(xué)生覺得自己清楚題目中的知識點，但是最終得到的分數(shù)卻不盡如人意。那么怎么樣才能寫...
IB DP Biology: SL復(fù)習(xí)筆記2.4.3 Skills: Enzyme Experiments
Practical 3: Enzyme Experiments Design of experiments to test the effect of temperature, pH and substrate concentration on the activity of enzymes Three different?independent variables?can be teste...
IB DP Biology: SL復(fù)習(xí)筆記2.4.2 Immobilised Enzymes
Immobilised Enzymes Immobilised enzymes are widely used in industry Just before 1900, it was discovered that enzymes could be used to catalyse production of alcohol in the absence of yeast cell Sin...
IB DP Biology: SL復(fù)習(xí)筆記2.4.1 Enzymes
Structure of Enzymes Enzymes are?biological catalysts ‘Biological’ because they function in?living systems ‘Catalysts’ because they?speed up the rate of chemical reactions?without being used up or ...
IB DP Biology: SL復(fù)習(xí)筆記2.3.4 Skills: Molecules
Molecular Diagrams: Drawing Drawing biological molecules It is important to be able to?draw a few key molecules There is a huge variety of biological molecules, but?only the most important ones?are...
