IB DP Biology: SL复习笔记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...
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IB DP Biology: SL复习笔记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复习笔记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复习笔记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...
IB DP Biology: SL复习笔记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复习笔记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复习笔记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复习笔记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...
IB DP Biology: SL复习笔记2.3.3 The Variety of Proteins
Functions of Proteins Living organisms synthesize many different proteins with a wide range of functions Proteins are so versatile that they have many different roles in cells, tissues and organs A...
