AQA A Level Biology復習筆記2.3.9 Viral Particle Replication
Viruses Do Not Undergo Cell Division Viruses?are?non-cellular infectious particles?that straddle the boundary between ‘living’ and ‘non-living’ They are?much smaller?than?prokaryotic cells T...
AQA A Level Biology復習筆記2.3.8 Binary Fission DOWNLOAD PDF
Binary Fission of Prokaryotic Cells The process of cell division (binary fission) in prokaryotic cells is much simpler than mitosis in eukaryotic cells Prokaryotic cells do not possess: A nu...
AQA A Level Biology復習筆記2.3.7 Uncontrolled Cell Division & Cancer
Uncontrolled Cell Division & Cancer Cancers demonstrate how important it is that?cell division?is?precisely controlled, as cancers arise due to?uncontrolled mitosis Cancerous cells divid...
AQA A Level Biology復習筆記2.3.6 Investigating Plant Root Tips
Maths Skill: Mitotic Index The mitotic index is the?proportion?of cells (in a group of cells or a sample of tissue) that are?undergoing mitosis The mitotic index can be calculated using the ...
AQA A Level Biology復習筆記2.3.5 Recognising the Stages of Mitosis
Recognising the Stages of Mitosis from Images Cells undergoing different stages of the cell cycle can be identified using photomicrographs taken from microscope slides Cells undergoing certa...
AQA A Level Biology復習筆記2.3.4 Cytokinesis
Cytokinesis Cytokinesis Although?not regarded as a phase of mitosis, cytokinesis is an important final step in the cell cycle because during this stage the?cytoplasm?is?divides?forming two g...
AQA A Level Biology復習筆記2.3.3 The Stages of Mitosis
Mitosis: The Stages Mitosis is the process of nuclear division by which?two genetically identical daughter nuclei?are produced that are also genetically identical to the parent cell nucleus ...
AQA A Level Biology復習筆記2.3.2 Mitosis
The Importance of Mitosis Mitosis is the process of nuclear division by which two genetically identical daughter nuclei are produced that are also genetically identical to the parent nucleus...
AQA A Level Biology復習筆記2.2.7 Scientific Research into Cell Organelles
Appreciating the Process of Distinguishing Organelles When looking at a?prepared sample?(e.g. a cell or a group of cells) under a microscope, you can sometimes see things that aren’t actuall...
AQA A Level Biology復習筆記2.2.6 Cell Fractionation & Ultracentrifugation
Cell Fractionation & Ultracentrifugation Biologists and other scientific researchers may sometimes want to study?one specific?organelle This may be to: Look at the appearance of the spec...
AQA A Level Biology復習筆記2.2.5 Magnification Calculations
Magnification Calculations Magnification?is?how many times bigger?the image of a specimen observed is in comparison to the actual (real-life) size of the specimen The?magnification?(M) of an...
AQA A Level Biology復習筆記2.2.4 Resolution & Magnification
Resolution & Magnification Magnification Magnification is how many times bigger the image of a specimen observed is in compared to the actual (real-life) size of the specimen A?light mic...
