Chemistry 9701 · AS & A Level · Nitrogen compounds

Nitrogen compounds — practice question

Proteins are large, intricate molecules built from long chains that fold into a three-dimensional form.
(a)[3]

Look at the table that outlines bonding in proteins. For each bonding description, show whether it belongs to the primary, secondary or tertiary structure of a protein.

(b)[4]

Explain, using diagrams where suitable, how competitive inhibition differs from non-competitive inhibition of enzymes.

(c)[3]

The diagram shows one DNA strand. Add a matching strand that is clearly labelled, showing the bonds that join the two strands together. Name the bases in your strand, and make it clear which base pairs with each base in the strand shown.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: Accurate pairing of bonding with primary, secondary and tertiary structure.

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