Download Cambridge International AS and A Level Biology Coursebook by Mary Jones PDF

By Mary Jones

Absolutely revised and up to date content material matching the hot Cambridge foreign Examinations Biology 9700 syllabus for first instructing in 2014 and primary exam in 2016. counseled through Cambridge overseas Examinations, the Fourth version of the AS/A point Biology Coursebook comprehensively covers the entire wisdom and talents scholars want in the course of the Biology 9700 path (first exam 2016). Written via well known specialists in Biology educating, the textual content is written in an obtainable variety with overseas inexperienced persons in brain. The Coursebook is simple to navigate with colour-coded sections to distinguish among AS and a degree content material. Self-assessment questions let novices to trace their development and exam-style questions support freshmen to arrange completely for his or her examinations. modern contexts are mentioned all through improving the relevance and curiosity for freshmen.

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Extra resources for Cambridge International AS and A Level Biology Coursebook with CD-ROM

Sample text

H H H One important aspect of the structure of pentoses and hexoses is that the chain of carbon atoms is long enough to close up on itself and form a more stable ring structure. This can be illustrated using glucose as an example. 4). The ring therefore contains oxygen, and carbon atom number 6 is not part of the ring. 4 that the hydroxyl group, –OH, on carbon atom 1 may be above or below the plane of the ring. The form of glucose where it is below the ring is known as α-glucose (alpha-glucose) and the form where it is above the ring is β -glucose (beta-glucose).

The two α chains are shown in purple and blue, and the two β chains in brown and orange. Each polypeptide chain contains a haem group, shown in yellow and red. b The haem group contains an iron atom, which can bond reversibly with an oxygen molecule. c The complete haemoglobin molecule is nearly spherical. Quaternary structure is the three-dimensional arrangement of two or more polypeptides, or of a polypeptide and a non-protein component such as haem, in a protein molecule. Chapter 2: Biological molecules Globular and fibrous proteins A protein whose molecules curl up into a ‘ball’ shape, such as myoglobin or haemoglobin, is known as a globular protein.

Not surprisingly, Cambridge has become a centre of excellence for technologies associated with biology, particularly in the pharmaceutical and computing industries. Scientists from many disciplines and from all over the world have the opportunity to work together in a close-knit and highly productive community. The study of biological molecules forms an important branch of biology known as molecular biology. The importance of the subject is clear from the relatively large number of Nobel prizes that have been awarded in this field.

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