Decomposition (OCR GCSE Biology A (Gateway Science Suite)): Quizzes

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Decomposition
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What is decomposition?

Breaking down organic material into simpler forms

How does temperature generally affect the rate of decomposition?

Faster in warmer conditions

What happens to enzymes if the temperature becomes too high during decomposition?

They denature

Why do microorganisms responsible for decomposition thrive in moist environments?

Water is essential for their respiration

How does water availability help decomposers digest organic material?

It softens the material

Why do most decomposers require oxygen?

For aerobic respiration

What is compost?

A natural fertilizer rich in nutrients

What is the purpose of providing oxygen when making compost?

Allows aerobic respiration

What is produced as a by-product of aerobic respiration during composting?

Heat

What gas is produced during anaerobic decomposition?

Methane

What constant temperature is needed in biogas generators to produce methane?

Around 30°C

What is a limitation of methane produced in biogas generators?

It cannot be stored as a liquid

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