A slide of potato cells was viewed using a light microscope - Edexcel - GCSE Biology Combined Science - Question 2 - 2020 - Paper 1

The structures found in plant cells but not in animal cells include the cell wall, chloroplasts, and large vacuoles. Therefore, the correct option is D: cell wall, chloroplast, large vacuole.

The percentage difference can be calculated using the formula:

$\text{Percentage Difference} = \frac{|\text{Value}_2 - \text{Value}_3|}{\text{Value}_3} \times 100$

Assuming the mean length of starch grains for potato 2 at 5 weeks is 50 µm and for potato 3 at 10 weeks is 30 µm:

$\text{Percentage Difference} = \frac{|50 - 30|}{30} \times 100 = \frac{20}{30} \times 100 \approx 66.67\%$

1. Temperature of the storage environment.
2. Light conditions during the dark storage period.

Potatoes need glucose for energy, which is essential for respiration.

Starch is broken down into glucose by enzymes such as amylase. The process involves the following steps:

1. Amylase binds to starch at its active site, breaking the bonds between glucose molecules.
2. As the starch is hydrolyzed, it is converted into glucose monomers, which can then be utilized for energy.