CIE IGCSE Biology: 复习笔记：3.1.4 Osmosis
CIE IGCSE Biology: 复习笔记：3.1.4 Osmosis Osmosis All cells are surrounded by a cell membrane which is partially permeable Water can move in and out of cells by osmosis Osmosis is the diffusion of...
CIE IGCSE Biology: 复习笔记：3.1.3 Water
CIE IGCSE Biology: 复习笔记：3.1.3 Water Water as a Solvent Water is important for all living organisms as many substances are able to dissolve in it (it is a solvent) This makes it incredibly usef...
OCR A Level Biology:复习笔记2.2.6 Biochemical Tests: Reducing Sugars & Starch
Biochemical Tests: Reducing Sugars & Starch There are a number of tests that can be carried out quickly and easily in a lab to determine if a sample contains a certain type of sugar The followi...
OCR A Level Biology:复习笔记2.2.5 Polysaccharides
Polysaccharides: Structure Starch, glycogen and cellulose are polysaccharides Polysaccharides are macromolecules (polymers) that are formed by many monosaccharides joined by glycosidic bonds in a c...
OCR A Level Biology:复习笔记2.2.4 The Glycosidic Bond
The Glycosidic Bond Forming the glycosidic bond To make monosaccharides more suitable for transport, storage and to have less influence on a cell’s osmolarity, they are bonded together to form disa...
OCR A Level Biology:复习笔记2.2.3 Monosaccharides
Monosaccharides Sugars can be classified as reducing or non-reducing; this classification is dependent on their ability to donate electrons Reducing sugars can donate electrons (the carbonyl group ...
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...
CIE IGCSE Biology: 复习笔记：3.1.1 Diffusion
CIE IGCSE Biology: 复习笔记：3.1.1 Diffusion Diffusion Diffusion is the movement of molecules from a region of its higher concentration to a region of its lower concentration Molecules move down a ...
