The photograph shows a species of fungus growing on a dead tree in a woodland habitat. Wood contains a high proportion of lignin and cellulose. Fungi can break down molecules in wood by releasing extracellular enzymes. Describe the role of the rough endoplasmic reticulum in the formation of extracellular enzymes. (3) ................................................................................................................................................................................................................................................................................ ................................................................................................................................................................................................................................................................................

Biology

IGCSE&ALevel

EDEXCEL

Exam No：wbi12-01-que-20240518 Year：2024 Question No：8(a)

Answer:

A description that makes reference to three of the following points:
- translation occurs at rER ribosomes / \{polypeptide (chain) / chain of amino acids\} enters rER (1)
- formation of \{a-helix / \(\beta\)-pleated sheet / secondary structure / tertiary structure / 3D shape / globular structure\} (1)
- (causing) formation of \{hydrogen bonds / covalent bonds / ionic bonds / disulphide bridges\}
- \{polypeptide / protein / enzyme\} packaged into (transport) vesicle to go to Golgi apparatus (1)

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