Science — AI-generated practice question

Biologists consider molecular movements necessary for life because living organisms are highly organised structures that constantly break down due to environmental effects. To maintain this organisation and prevent breakdown, organisms must continuously repair and rebuild their structures. Since all biological structures are made of molecules, molecules must be moved around constantly to carry out these maintenance processes. Viruses, for example, show no molecular movement until they infect a cell — which is precisely why there is controversy about whether they are truly alive.

Source: Chapter 5, Introduction

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The examiner expects three key points here (1 mark each):

1. Living organisms are ordered/organised structures that tend to break down.
2. Continuous repair/maintenance is needed to sustain life.
3. Since structures are made of molecules, molecular movement is essential — supported by the virus example.

Avoid vague statements like "molecules are important." Be specific: maintenance of organised structures is the reason. The virus example is a strong, textbook-cited evidence that adds precision.