OCR A Level Biology:复习笔记2.3.5 DNA Replication
Semi-conservative Replication of DNA Before?a (parent) cell?divides, it needs to?copy the DNA?contained within it Doubling the DNA ensures that the two new (daughter) cells produced will both recei...
OCR A Level Biology:复习笔记2.3.4 DNA Purification
DNA Purification Practical investigations can be conducted to?purify?(isolate)?DNA?via the process of?precipitation Isolating DNA?from cells is an essential?starting point?for a huge range of other...
OCR A Level Biology:复习笔记2.3.3 DNA: Structure
DNA Structure The nucleic acid DNA is a?polynucleotide?– it is made up of?many nucleotides?bonded together in a?long chain A DNA nucleotide DNA molecules are made up of?two polynucleotide st...
OCR A Level Biology:复习笔记2.3.2 Phosphorylated Nucleotides
Structure of ATP & ADP All organisms require a constant supply of energy to maintain their cells and stay alive In all organisms this energy is required for: Anabolic reactions?(building larger...
OCR A Level Biology:复习笔记2.3.1 Nucleotides & Phosphodiester Bonds
Nucleotides DNA and RNA are nucleic acids:?polymers?that are made up of?many repeating units?(monomers) called?nucleotides Each nucleotide is formed from: A?pentose sugar?(a sugar with 5 carbon ato...
CIE IGCSE Biology: 复习笔记：5.1.5 Enzymes & pH: Extended
CIE IGCSE Biology: 复习笔记：5.1.5 Enzymes & pH: Extended Enzymes & pH: Extended The optimum pH for most enzymes is 7 but some that are produced in acidic conditions, such as the stomach, h...
CIE IGCSE Biology: 复习笔记：5.1.4 Enzymes & Temperature: Extended
CIE IGCSE Biology: 复习笔记：5.1.4 Enzymes & Temperature: Extended Enzymes & Temperature: Extended Enzymes are?proteins?and have a?specific shape, held in place by?bonds This is extremely i...
CIE IGCSE Biology: 复习笔记：5.1.3 Enzyme Action & Specificity: Extended
CIE IGCSE Biology: 复习笔记：5.1.3 Enzyme Action & Specificity: Extended Enzyme Action & Specificity: Extended Enzymes are?specific?to one particular substrate(s) as the?active site?of the ...
CIE IGCSE Biology: 复习笔记：5.1.2 Enzyme Investigations
CIE IGCSE Biology: 复习笔记：5.1.2 Enzyme Investigations Investigating the Effect of Temperature on Amylase Starch solution?is heated to a set temperature Iodine?is added to wells of a spotting til...
