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2.1.1 Biological Molecules
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+ +
Water is a polar molecule because e s shared in covalent
H H bond between the O atom and H atoms are slightly closer to
H H
O- the O atom so H has a slight positive charge. Oxygen has two
O H+ H+…

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Protein Description Example
Fibrous Tough, rope shaped Collagen forms supportive tissues made of 3 polypeptide chains coiled
found in connective into triple helix, chains interlinked with strong covalent bonds Minerals
tissue bind to helix, making it rigid.
Globular Round, compact, Haemoglobin carries O2 around the body. Curled up so hydrophilic…

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