Revision notes topic questions past papers

x 

(H

2

O)

y

The three types of carbohydrates are monosaccharides, disaccharides and

polysaccharides

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CIE AS Biology (9700) 2019-2021 Revision Notes

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2. Biological Molecules

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Page 15

Types of carbohydrate table

Exam Tip

When discussing monomers and polymers, give the definition but also name specific

examples eg. nucleic acids – the monomer is a nucleotide.

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CIE AS Biology (9700) 2019-2021 Revision Notes

savemyexams.co.uk

2. Biological Molecules

YOUR NOTES

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© 2015-2021 Save My Exams Ltd

CIE AS Biology (9700) 2019-2021 Resources

REVISION NOTES 

 

  TOPIC QUESTIONS 

 

  PAST PAPERS

Page 16

The Two Forms of Glucose

The most well-known carbohydrate monomer is glucose

Glucose has the molecular formula C

6

H

12

O

6

Glucose is the most common monosaccharide and is of central importance to most forms of

life

There are different types of monosaccharide formed from molecules with varying numbers of

carbon atom, for example:

Trioses (3C) eg. glyceraldehyde

Pentoses (5C) eg. ribose

Hexoses (6C) eg. glucose

Glucose exists in two structurally different forms – alpha (α) glucose and beta (β) glucose

and is therefore known as an isomer

This structural variety results in different functions between carbohydrates

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