Carbon cycle (Edexcel GCSE Biology): Quizzes

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Carbon cycle
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Which of these biomolecules contains carbon as a key element?

Proteins, carbohydrates, and fats

What carbohydrate containing carbon makes up plant cell walls?

Cellulose

Which process removes carbon dioxide from the atmosphere?

Photosynthesis

What does photosynthesis convert carbon dioxide and water into?

Glucose and oxygen

Which organisms return carbon dioxide to the atmosphere through respiration?

Plants, animals, and microorganisms

What is produced as a waste product when glucose is broken down during respiration?

Carbon dioxide

Which of these are examples of fossil fuels?

Coal, oil, and natural gas

How is carbon passed along the food chain?

Animals eat plants

Which organisms act as decomposers in the carbon cycle?

Bacteria and fungi

What are detritivores?

Animals that feed on dead material

What conditions can slow decomposition and lead to fossilisation?

Lack of oxygen or cold environments

In photosynthesis, what form does carbon start and end as?

Starts as carbon dioxide, ends as glucose

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