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Download PDF by Brenda Walpole, Ashby Merson-Davies, Leighton Dann, Peter: Biology for the IB Diploma Coursebook

By Brenda Walpole, Ashby Merson-Davies, Leighton Dann, Peter Hoeben, Mark Headlee

ISBN-10: 0521171784

ISBN-13: 9780521171786

A brand new name that provides an in-depth research of all themes lined within the IB syllabus, getting ready scholars with the abilities had to achieve the exam. Biology for the IB degree is a accomplished new publication written through an skilled writer staff. The textual content bargains an in-depth research of all subject matters coated within the IB syllabus, getting ready scholars with the abilities had to reach the exam. hyperlinks to thought of information topics are integrated. good points comprise: sincerely said studying goals first and foremost of every part; fast questions all through each one bankruptcy; available language for college students in any respect degrees; exam-style questions; and a thesaurus and index. The accompanying CD-ROM comprises 8 chapters protecting the syllabus techniques, pattern exam papers and version solutions.

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Extra info for Biology for the IB Diploma Coursebook

Example text

And it produces one molecule of water. The condensation of two monosaccharides produces a disaccharide. 5. two glucose monomers CH2OH C H C HO CH2OH O H OH H C C H OH H2O maltose – a disaccharide H C H C C OH HO CH2OH O H OH H C C H OH H C H C C OH HO CH2OH O H OH H C C H OH H H C C C O O H OH H C C H OH H C OH condensation reaction one molecule of water is released structure of part of a glycogen molecule – one polysaccharide of glucose Glycogen consists of compact molecules made up of branching chains of glucose.

Cells are able to exchange sodium ions for potassium ions against concentration gradients using energy provided by ATP. Sodium ions are pumped out of the cell and potassium ions are pumped into the cell. Step 1 potassium ions outside The breakdown of ATP provides energy for the proteins to change shape and to allow the ions to move. 18 An example of active transport – the sodium–potassium pump. Start at step 1 for each ion in turn and work round clockwise. Exocytosis and endocytosis There are two types of endocytosis.

32 Cells often have to transport large chemical molecules or material in bulk across the plasma membrane. Neither diffusion nor active transport will work here. 19. Uptake is called endocytosis and export is exocytosis. Both require energy from ATP. During endocytosis, part of the plasma membrane is pulled inward and surrounds the liquid or solid that is to be moved from the extracellular space into the cell. The material becomes enclosed in a vesicle, which pinches off from the plasma membrane and is drawn into the cell.

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Biology for the IB Diploma Coursebook by Brenda Walpole, Ashby Merson-Davies, Leighton Dann, Peter Hoeben, Mark Headlee


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