2.1 Molecules to metabolism

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2.1 Molecules to metabolism

2.1 Molecules to metabolism

Concept mapping of the 2.1 Molecules to Metabolism

Knowledge control of 2.1 Molecules to Metabolism

Essential idea:


2.1.1 Living organisms control their composition by a complex web of chemical reactions.


Molecular Visualization

Animation of some atoms

Nature of science:


2.1.2 Falsification of theories—the artificial synthesis of urea helped to falsify vitalism. (1.9)




2.1.3 Molecular biology explains living processes in terms of the chemical

substances involved.


Animated atoms

Tutorial on manipulating Jmol 3D molecular models in web pages.

Jmol displays of 3-D structures of Biological molecules

Chemical bonds

3D molecular models


Chemical Bonds


Functional groups I 

Functional groups II  

Interactive Functional groups animation


2.1.4 Carbon atoms can form four covalent bonds allowing a diversity of stable

compounds to exist.



Mixtures vs. compound



2.1.5 Life is based on carbon compounds including carbohydrates, lipids, proteins and nucleic acids.



2.1.6  Metabolism is the web of all the enzyme-catalysed reactions in a cell or




Introduction to metabolismIs ATP always used to provide energy for cellular work?


2.1.7  Anabolism is the synthesis of complex molecules from simpler molecules

including the formation of macromolecules from monomers by condensation



Dehydration Synthesis and Hydrolysis 


2.1.8 Catabolism is the breakdown of complex molecules into simpler molecules including the hydrolysis of macromolecules into monomers.




2.1.9 Urea as an example of a compound that is produced by living organisms but can also be artificially synthesized.




2.1.10 Skill: Drawing molecular diagrams of glucose, ribose, a saturated fatty acid

and a generalized amino acid.


2.1.11 Skill: Identification of biochemicals such as sugars, lipids or amino acids from

molecular diagrams.




2.1.12 Only the ring forms of D-ribose, alpha–D-glucose and beta-D-glucose are

expected in drawings.


 Models of carbohydrates


2.1.13 Sugars include monosaccharides and disaccharides.


2.1 Molecules to Metabolism Past Paper Questions

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