CAIE A Level Biology 9700 · Biological molecules
The table below lists the four levels of protein structure. For each level, write a description of the structure and state the main bonds or interactions that stabilise it.
| Level of protein structure | Description and bonding/interactions |
|---|---|
| Primary | |
| Secondary | |
| Tertiary | |
| Quaternary |
4 marks, so the mark scheme is looking for about 4 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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