GCSE Edexcel Biology Magnification: 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 ha... 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

C a cell wall.

Animal cells are characterized by the absence of a cell wall, which distinguishes them from plant cells.

Step 2

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 400 x.

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Answer

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

$ext{Length of magnified image} = ext{actual length} imes ext{magnification}$

Substituting in the values:

$ext{Length of magnified image} = 20.5 ext{ μm} imes 400 = 8200 ext{ μm}$

Thus, the length of the magnified image of the red blood cell is 8200 μm.

Step 3

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

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Answer

Given that the width when magnified 400 x is 3.08 mm, we first convert this to micrometers:

$3.08 ext{ mm} = 3080 ext{ μm}$

Now applying the formula to find the actual width:

$ext{Actual width} = rac{ ext{magnified width}}{ ext{magnification}}$

Substituting in the values:

$ext{Actual width} = rac{3080 ext{ μm}}{400} = 7.7 ext{ μm}$

In standard form, this is:

$7.7 ext{ μm} = 7.7 imes 10^0 ext{ μm}$

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

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 400 x.

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

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