Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.7.7 Practical: The Effect of Exercise on Breathing Practical: The Effect of Exercise on Breathing Exercise causes the?frequency of breathing to increase?in o...
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 ...
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...
Edexcel IGCSE Biology 復(fù)習(xí)筆記 2.7.6 Smoking & the Human Gas Exchange System Smoking & the Gas Exchange System Smoking causes?chronic obstructive lung disease?(COPD), coronary heart ...
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 ...
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...
Interpret & Evaluate Data about Genetic Expression RNA analysis RNA analysis is important with regards to gene expression From the outside, most cells look almost identical with the same...
Transcription Factors Eukaryotes use?transcription factors?to control gene expression A transcription factor is a protein that?controls the transcription of genes?by binding to a specific re...
Apparatus & Techniques: Producing Tissue Cultures from Cauliflower Explants Creating clones of cauliflowers is used to demonstrate totipotency through the production of?tissue culture Ca...
