Biology 5090 · O Level · Concept and use of a classification system

Concept and use of a classification system — practice question

Rhizomucor pusillus is a fungus that occurs in heaps of dead plant vegetation. Its optimum growth rate lies between $60\,^{\circ}\text{C}$ and $70\,^{\circ}\text{C}$.
(a(i))[1]

Identify the kingdom and genus names of this organism.

(a(ii))[2]

Give two main features of organisms placed in the kingdom named in (a)(i).

(a(iii))[4]

Explain why piles of dead plant vegetation can reach temperatures much higher than the surrounding environment.

(b(i))[4]

Explain the results over the $pH$ range $2$-$7$.

(b(ii))[1]

The experiment was repeated at $55\,^{\circ}\text{C}$. On Fig. 5.1, draw a graph to show the results expected at $55\,^{\circ}\text{C}$.

(b(iii))[1]

Name an industrial process in which pectinase is used.

Worked solution & mark scheme

This 13-mark question has a full step-by-step worked solution and mark scheme. One marking point: Rhizomucor + fungus / fungi

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