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...
