AQA A Level Biology复习笔记8.4.2 Producing Fragments of DNA
Producing Fragments of DNA Genetic engineering is the deliberate modification of a specific characteristic (or characteristics) of an organism. The technique involves removing a gene (or gen...
AQA A Level Biology复习笔记8.3.4 Sequencing Methods
Sequencing Methods DNA sequencing allows for the base sequence of an organism's genetic material to be identified and recorded Sequencing methods are continuously evolving and becoming faste...
AQA A Level Biology复习笔记8.3.3 Non-Coding DNA & Regulatory Genes
Non-Coding DNA & Regulatory Genes It can be highly difficult to translate the [popover id="IBYOAu-X6ZA6x3aV" lave="genome"] of complex organisms into their proteome Determining the prote...
AQA A Level Biology复习笔记8.3.2 Determining Protein Sequences
Sequencing DNA to Determine Protein Sequences The genome of simpler organisms can be used to obtain the proteome (the sequences of the proteins) of the organism This information can be used ...
AQA A Level Biology复习笔记8.2.11 Tumour Development
Tumour Development Cancers demonstrate how important it is that cell division is precisely controlled, as cancers arise due to uncontrolled mitosis Cancerous cells divide repeatedly and unco...
AQA A Level Biology复习笔记8.2.10 Two Types of Tumours
The Characteristics of Benign & Malignant Tumours Tumours are groups of abnormal cells that form lumps or growths They can start in any of the cells in our bodies Tumours have different ...
AQA A Level Biology复习笔记8.2.9 RNA Interference
RNA Interference RNA interference (RNAi) is a form of post-translational modification which occurs in the cytoplasm RNAi is sequence-specific silencing of gene expression and therefore can b...
AQA A Level Biology复习笔记8.2.8 Epigenetics & Disease
Epigenetics & Disease Inheritance of epigenetic modifications Epigenetic imprinting is the DNA methylation of certain genes and it occurs during the formation of oocytes and sperm cells ...
AQA A Level Biology复习笔记8.2.7 Epigenetics
Epigenetics DNA is wrapped around histone proteins which form a nucleosome. Nucleosomes coil tightly around each other to form the chromosome structure. In eukaryotic cells, th...
