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F334 Chemistry of Materials: The Thread of Life
Kinetics

(a) explain and use the terms:
Rate of reaction Rate of reaction the rate at which reactants are converted into products the change in
concentration of a reactant or product divided by the time taken for the change to occur.
Order…

Page 2

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F334 Chemistry of Materials: The Thread of Life

(b) understand that these experimental methods can be used in a school laboratory for following a reaction:
Titration Monitor the concentration of a reactant or product in a solution by taking small samples of
the reaction mixture at regular time intervals and…

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F334 Chemistry of Materials: The Thread of Life


(e) use experimental data (halflives of initial rates when varying concentrations are used) to find the order of
reaction (zero, first or secondorder), and hence construct a rate equation for the reaction


















(f) use the term ratedetermining step to describe the slowest…

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F334 Chemistry of Materials: The Thread of Life
The order of reaction with respect to a reactant shows the number of molecules of that reactant which are
involved in the rate determining step.
For example: Cl· + O 3
Cl· + O 2 is the ratedetermining step.

Cl· and O3…

Page 5

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F334 Chemistry of Materials: The Thread of Life
Ionic interactions between charged side groups, e.g. CO2

and NH3
+
.
Hydrogen bonding between groups such as OH and NH 2.

Disulfide bridge strong covalent bonds between two sulfurcontaining the side group SH.

Organic Reactions

(j) describe the acidbase properties of…

Page 6

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F334 Chemistry of Materials: The Thread of Life
distance travelled by spot
Rf = distance travelled by solvent




(l) describe the characteristics of enzyme catalysis:
(m) explain these characteristics of enzyme catalysis in terms of a threedimensional active site (part of the
tertiary structure) to which the substrate forms intermolecular…

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F334 Chemistry of Materials: The Thread of Life








the four bases present in DNA join by condensation with the deoxyribose in the phosphatesugar backbone;















Purine adenine and guanine.
Pyrimidine cyotsine, uracil and thymine.


two strands of DNA form a doublehelix structure through base pairing; understand that various models were
devised…

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F334 Chemistry of Materials: The Thread of Life

Complementary base pairing allows replication to make new cells through cell division. One strand can make a
complementary copy of itself .

Complementary base pairing also allows protein synthesis. One strand can make a complementary copy of
messenger RNA , called transcription…

Page 9

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F334 Chemistry of Materials: The Thread of Life

Bond Pairs 2 3 4 3 2 5 6
Lone Pairs 0 0 0 1 2 0 0
o
Bond
180o
120o Approx 109 Approx 109
o o
Approx 109o
90 and 120o
90o
Angle


Wedge bond facing towards the plane.
Dotted…

Page 10

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F334 Chemistry of Materials: The Thread of Life
A chiral carbon atom is one that has four different groups attached to it. It's possible to arrange the groups in two
different ways around the carbon atom so that two different molecules are made these molecules are called
enantiomers . Enantiomers…

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