Cambridge International AS and A Level Biology Coursebook with CD-ROM : Mary Jones :Subject to statutory exception and to the provisions of relevant collective licensing agreements, no reproduction of any part may take place without the written permission of Cambridge University Press. Cambridge University Press has no responsibility for the persistence or accuracy of URLs for external or third-party internet websites referred to in this publication, and does not guarantee that any content on such websites is, or will remain, accurate or appropriate. Contents Introduction 1 Cell structure Why cells? Cell biology and microscopy Animal and plant cells have features in common Differences between animal and plant cells Units of measurement in cell studies Electron microscopes Ultrastructure of an animal cell Structures and functions of organelles Ultrastructure of a plant cell Two fundamentally different types of cell Tissues and organs End-of-chapter questions. Phospholipids Structure of membranes Transport across the cell surface membrane End-of-chapter questions. Tobacco smoke Lung diseases Cardiovascular diseases Proving the links between smoking and lung disease Prevention and cure of coronary heart disease End-of-chapter questions. Homeostasis Excretion The structure of the kidney Control of water content Nervous communication Hormonal communication Plant growth regulators Electrical communication in plants End-of-chapter questions.
Cambridge International AS and A Level Marine Science Teacher's Resource CD ROM Pdf Book
Cambridge International AS and A Level Biology Coursebook
In many proteins, the secondary structure itself is coiled or folded. Figure 2. At first sight, the myoglobin and lysozyme molecules look like disorganised tangles, but this is not so. The shape of the molecules is very precise, and the molecules are held in these exact shapes by bonds between amino acids in different parts of the chain. The way in which a protein coils up to form a precise three-dimensional shape is known as its tertiary structure. The R groups are not shown.
Cambridge International AS and A Level Biology Coursebook Mary Jones, Richard Fosbery, Jennifer Gregory and Dennis Taylor Cambridge International AS.
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