OCR A Level Biology:復習筆記2.1.2 Using a Microscope
Preparation of Microscope Slides Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists as they allow for tissues, cells and ...
OCR A Level Biology:復習筆記2.1.1 Studying Cells
Use of Microscopy Microscopes?can be used to analyse?cell components?and observe?organelles Magnification?and?resolution?are two scientific terms that are very important to understand and?distingui...
OCR A Level Biology:復習筆記1.2.16 Practical: Using a Light Microscope
Practical: Using a Light Microscope Many biological structures are too small to be seen by the naked eye Optical microscopes are an invaluable tool for scientists as they allow for tissues, cells a...
OCR A Level Biology:復習筆記1.2.15 Practical: Investigating the Rate of Transpiration
Practical: Investigating the Rate of Transpiration Using a potometer Air movement, humidity, temperature and light intensity all have an effect on the rate at which transpiration occurs The table b...
OCR A Level Biology:復習筆記1.2.14 Serial Dilutions
Serial Dilutions Serial dilutions are created by taking a series of dilutions of a stock solution. The concentration decreases by the?same?quantity between each test tube They can either be ‘doubli...
OCR A Level Biology:復習筆記1.2.13 Chromatography
Chromatography Chromatography is a technique that can be used to?separate a mixture?into its individual components Chromatography relies on?differences in the solubility?of the different chemicals ...
OCR A Level Biology:復習筆記1.2.12 Biochemical Tests: Proteins
Biochemical Tests: Proteins The Biuret test can be carried out quickly and easily in a lab to determine if a sample contains proteins Biuret ‘reagent’ contains an?alkali and copper (II) sulfate?whi...
OCR A Level Biology:復習筆記1.2.11 Biochemical Tests: Lipids
Biochemical Tests: Lipids Identifying biological molecules Different?qualitative?reagents can be used to identfy the presence of biological molecules in samples Ethanol?is used to identify lipids B...
OCR A Level Biology:復習筆記1.2.10 Biochemical Tests: Reducing Sugars & Starch
Biochemical Tests: Reducing Sugars & Starch Benedict’s solution?can be used to carry out a?semi-quantitative?test on a?reducing sugar solution?to determine the?concentration?of reducing sugar p...
