Photosynthesis occurs in leaves. (i) Which substance is needed for photosynthesis? A carbon dioxide B glucose C oxygen D nitrogen (ii) A leaf cell is 0.08 mm long. Calculate the length of the image of this cell after it has been magnified 50 times using a microscope.

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Photosynthesis occurs in leaves - Edexcel - GCSE Biology - Question 3 - 2019 - Paper 1

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Photosynthesis occurs in leaves. (i) Which substance is needed for photosynthesis? A carbon dioxide B glucose C oxygen D nitrogen (ii) A leaf cell is 0... show full transcript

Worked Solution & Example Answer:Photosynthesis occurs in leaves - Edexcel - GCSE Biology - Question 3 - 2019 - Paper 1

Step 1

Which substance is needed for photosynthesis?

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Answer

The substance needed for photosynthesis is carbon dioxide (A). Glucose is a product of photosynthesis, while oxygen is released as a byproduct. Nitrogen is not involved in the process.

Step 2

Calculate the length of the image of this cell after it has been magnified 50 times using a microscope.

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Answer

To find the length of the image of the cell when magnified, we use the formula:

ext{Length of the image} = ext{original length} imes ext{magnification}

The original length of the cell is 0.08 mm, and the magnification is 50:

ext{Length of the image} = 0.08 ext{ mm} imes 50 = 4 ext{ mm}

Therefore, the length of the image is 4 mm.

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