Figure 3 shows a diagram of a red blood cell from a turtle and a diagram of a red blood cell from a human. (i) These cells are animal cells. Animal cells do not have A cytoplasm B a cell membrane C a cell wall D mitochondria (ii) The actual length of the red blood cell from a turtle is 20.5 μm. Calculate the length of the magnified image of the red blood cell of the turtle when magnified 400x. (iii) The width of the human red blood cell, when magnified 400x, is 3.08 mm. Calculate the actual width of the cell and show your answer in standard form.

GCSE Edexcel Biology Circulatory system- blood: Figure 3 shows a diagram of a re

Figure 3 shows a diagram of a red blood cell from a turtle and a diagram of a red blood cell from a human - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1

Question 2

Figure 3 shows a diagram of a red blood cell from a turtle and a diagram of a red blood cell from a human. (i) These cells are animal cells. Animal cells do not hav... show full transcript

Worked Solution & Example Answer:Figure 3 shows a diagram of a red blood cell from a turtle and a diagram of a red blood cell from a human - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1

Step 1

These cells are animal cells. Animal cells do not have

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Answer

The correct answer is C, a cell wall. Animal cells lack rigid cell walls that are found in plant cells.

Step 2

Calculate the length of the magnified image of the red blood cell of the turtle when magnified 400x.

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Answer

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

ext{Magnified Length} = ext{Actual Length} imes ext{Magnification}

Substituting the values:

ext{Magnified Length} = 20.5 ext{ μm} imes 400 = 8200 ext{ μm}

Hence, the length of the magnified image is 8200 μm.

Step 3

Calculate the actual width of the cell and show your answer in standard form.

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Answer

To find the actual width, we use the same magnification formula:

ext{Actual Width} = rac{ ext{Magnified Width}}{ ext{Magnification}}

Substituting the values:

ext{Actual Width} = rac{3.08 ext{ mm}}{400} = 0.0077 ext{ mm} = 7.7 imes 10^{-3} ext{ mm}

Thus, the actual width of the human red blood cell is $7.7 imes 10^{-3}$ mm.

Figure 3 shows a diagram of a red blood cell from a turtle and a diagram of a red blood cell from a human - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1

Worked Solution & Example Answer:Figure 3 shows a diagram of a red blood cell from a turtle and a diagram of a red blood cell from a human - Edexcel - GCSE Biology - Question 2 - 2018 - Paper 1

These cells are animal cells. Animal cells do not have

Calculate the length of the magnified image of the red blood cell of the turtle when magnified 400x.

Calculate the actual width of the cell and show your answer in standard form.

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