OCR A Level Biology:复习笔记2.2.2 Monomers & Polymers
Monomers & Polymers There is a massive variety of life within and between organisms however the biochemical basis of life is similar for all living things The key molecules that are requ...
OCR A Level Biology:复习笔记2.2.1 Properties of Water
Properties of Water Water is of great biological importance. It is the medium in which all metabolic reactions take place in cells. Between 70% to 95% of the mass of a cell is water As 71% of the E...
OCR A Level Biology:复习笔记2.1.9 Prokaryotic & Eukaryotic Cells
Comparison of Prokaryotic & Eukaryotic Cells Animal and plant cells are types of eukaryotic cells, whereas bacteria are a type of prokaryote Prokaryotic cells are much smaller than eukaryotic c...
OCR A Level Biology:复习笔记2.1.8 The Cytoskeleton
The Cytoskeleton Within the cytoplasm of cells, there is an extensive network of protein fibres This is known as the cytoskeleton The cytoskeleton is made up of two main types of protein fib...
OCR A Level Biology:复习笔记2.1.7 Organelles & the Production of Proteins
Organelles & the Production of Proteins In cells, many organelles are involved in the production and secretion of proteins Organelles are specialised parts of a cell that carry out a particular...
OCR A Level Biology:复习笔记2.1.6 Eukaryotic Cells Under the Microscope
Photomicrographs of Eukaryotic Cells There are some features or structures that can help to identify whether a cell shown in an image is a plant cell or animal cell Structures found only in animal ...
OCR A Level Biology:复习笔记2.1.5 Eukaryotic Cells
Eukaryotic Cell Structure Cell surface membrane The structure of the cell surface membrane – although the structure looks static the phospholipids and proteins forming the bilayer are constantly in...
OCR A Level Biology:复习笔记2.1.4 Magnification & Resolution
Magnification Formula 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 object can ...
OCR A Level Biology:复习笔记2.1.3 Drawing Cells
Drawing Cells To record the observations seen under the microscope (or from photomicrographs taken) a labelled biological drawing is often made Biological drawings are line pictures which show spec...
