Which structure is found in plant cells but not animal cells?
From Biology 1, Higher
23 marks
An image of a cell is 18 mm long. The real length of the cell is 0.012 mm. Calculate the magnification.
From Biology 1, Higher
34 marks
Explain why an enzyme stops working at high temperatures.
From Biology 1, Higher
43 marks
A potato cylinder had a mass of 2.40 g. After 30 minutes in a sugar solution its mass was 2.64 g. Calculate the percentage change in mass and explain what this shows.
From Biology 1, Higher
153 marks
Describe three differences between prokaryotic and eukaryotic cells.
From Biology 1, Higher
163 marks
An image of a cell is 45 mm long. The real length of the cell is 0.03 mm. Calculate the magnification.
From Biology 1, Higher
173 marks
In an investigation, 2.4 cm³ of oxygen was collected in 40 s from hydrogen peroxide broken down by catalase. Calculate the mean rate of reaction in cm³/s and name one variable to control.
From Biology 2, Higher
83 marks
Explain the role of bile in digestion.
Score 0 / 23 · 0 of 8 marked
This paper is written by Plasmo in the style of the Edexcel GCSE Combined Science exam. It is not a past paper and is not produced or endorsed by the exam board.