Alevel biology coursework help

As a teacher delivering Ofqual reformed GCSE (9-1), AS and A level qualifications, have you ...

  • Have you considered the benefits to your centre and students in undertaking an ... Our Level 3 Extended Project qualification (EPQ) is a free standing qualification available to students in ...
  • Question Bank for AS/A level Biology  Question Bank is a free tool for AS/A level Biology which allows you to create practice question papers from thousands of past paper questions. In just a few clicks, you can create your own customised paper from our bank of WJEC Eduqas examination questions.

    Plasma membranes are located around the edge of animal cells and surround the cytoplasm and other organelles. They are made up of a phospholipid bilayer which consists of two layer of phospholipids with the hydrophobic heads on the outer layers and the hydrophylic tails on the inner layers. lipid soluble molecules can diffuse straight through the bilayer, water can osmosise through as well. The phospholipid bilayer contains intrinsic and extrinsic proteins. The intrinsic proteins go all the way through the bilayer whereas extrinsic proteins only go through the outer phospholipid layer. Extrinsic Proteins are used for recognition of the cell and usually have a glycoprotein attached for the recognition. Intrinsic Proteins are for allowing molecules through. Ways the proteins are designed to allow molecules through are: Protein pump, Protein Channel, Gated protein channel.

    Alevel biology coursework help

    a level biology coursework help

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