AQA A Level Biology复习笔记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复习笔记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复习笔记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复习笔记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复习笔记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...
AQA A Level Biology复习笔记2.2.3 Iodine Detects Starch Grains
Practical Skill: Using Iodine to Detect Starch Grains Starch is the storage polysaccharide of plants Sugars formed during photosynthesis are stored as starch inside starch grains These starc...
AQA A Level Biology复习笔记2.2.2 Microscopy & Drawing Scientific Diagrams
Practical Skill: Microscopy & Drawing Scientific Diagrams Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists a...
AQA A Level Biology复习笔记2.1.7 Viruses
Key Features of Viruses Viruses are non-cellular infectious particles that straddle the boundary between ‘living’ and ‘non-living’ They are relatively simple in structure; much smaller than ...
AQA A Level Biology复习笔记2.1.6 Prokaryotic v Eukaryotic Cells
Prokaryotic v Eukaryotic Cell Structures Animal and plant cells are types of eukaryotic cells, whereas bacteria are a type of prokaryote Prokaryotes have a cellular structure distinct from e...
