Biology 9700 · AS & A Level · Respiration

Respiration — practice question

The Krebs cycle takes place in the matrix of the mitochondrion. Fig. 6.1 sets out the sequence of steps in the Krebs cycle.
(a(i))[1]

Using Fig. 6.1, name the process shown at $1$ and $3$.

(a(ii))[1]

Using Fig. 6.1, name the process shown at $2$, $4$, $6$ and $7$.

(a(iii))[1]

Using Fig. 6.1, name the process shown at $5$.

(b)[2]

Identify the compounds K and L.

(c)[5]

Most of the hydrogen atoms released by the Krebs cycle take part in oxidative phosphorylation on the cristae of the mitochondria. Outline the process of oxidative phosphorylation.

Worked solution & mark scheme

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