CIE A Level Biology复习笔记19.1.7 Gene Editing
Gene Editing Gene?genome?editing?(or editing) allows genetic engineers to alter the DNA of organisms by?inserting,?deleting?or?replacing?DNA?at specific sites in the genome known to cause disease. ...
CIE A Level Biology复习笔记19.1.6 Genetic Engineering: Promoters & Marker Genes
Genetic Engineering: Promoter The?promoter?(an example of a length of non-coding DNA that has a specific function) is the?region of DNA that determines which gene will be expressed. This is because...
CIE A Level Biology复习笔记19.1.5 Genetic Engineering: Vectors
Genetic Engineering: Vectors Vectors are used to?transfer the desired genes?into a foreign cell Plasmids are the most commonly used vector but viruses and liposomes (a small vesicle with a phosphol...
CIE A Level Biology复习笔记19.1.4 Genetic Engineering: Enzymes
Genetic Engineering: Enzymes Genetic engineering is the deliberate modification of a specific characteristic (or characteristics) of an organism. The technique involves?removing a gene?(or genes), ...
CIE A Level Biology复习笔记19.1.3 Isolating the Desired Gene
Isolating the Desired Gene The gene with the specific characteristic that is required can be obtained in the following ways: Extracting the gene from the DNA of a donor organism using enzymes (rest...
CIE A Level Biology复习笔记19.1.2 Genetic Engineering
Genetic Engineering Explained Genetic engineering is a technique used to deliberately modify a specific characteristic (or characteristics) of an organism. The technique involves?removing a gene?(o...
CIE A Level Biology复习笔记19.1.1 Recombinant DNA
Recombinant DNA The genetic code is?universal, meaning that almost every organism uses the same four nitrogenous bases – A, T, C & G. There are a few exceptions This means that the?same?codons?...
CIE A Level Biology复习笔记18.3.6 Role of IUCN in Conservation
Role of IUCN & CITES in Conservation International cooperation?is essential if conservation is to be successful There are several agreements and authorities that exist within and between countr...
CIE A Level Biology复习笔记18.3.5 Controlling Invasive Species
Controlling Invasive Species A species that has?moved into an ecosystem where it was previously unknown?is an invasive species An invasive species can occur naturally as a result of a species migra...
