2.3 Carbohydrates & lipids

The core syllabus:

2.3 carbohydrates and lipids


HERE’S THE READING! (from Biology for the IB Diploma 2nd Edition, C.J. Clegg, Hodder Education 2014

This is quite much, even for Core/SL – there is no HL-specific material for this topic. The syllabus makes it look as if there should be less! But it is a BIG topic so be guided by the textbook.

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CARBOHYDRATES

1 THE GLYCOSIDIC BOND

This is C6H12O6 in fact, in this case, β glucose:

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(A further question is, why not α Glucose or indeed any of the other C6H12O6 isomers? Perhaps we can work on that later.)

And this is the GLYCOSIDIC bond formed between glucose molecules- a condensation reaction, meaning water is a product.

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glycosidic bond (1)


2 THE THREE MORE COMMON CARBOHYDRATE POLYMERS

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Starch


FATS/LIPIDS

1 ESTER BOND

This is a triglyceride

Fat_triglyceride_shorthand_formula

And these are the ESTER bonds which form the triglyceride from fatty acids and glycerol. Condensation reaction also.

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2 SATURATED, UNSATURATED AND TRANS FATS

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3 LAB – testing saturation in fats and oils


4 IB Past paper question on the measuring of BMI

BMIChart


DRAWING ORGANIC MACRO-MOLECULES AND THEIR BONDING

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