A group of students was investigating the activity of yeast. They produced a fact file, as shown in Fig. 1.1.
Fig. 1.1 text:
Organism: yeast
Scientific name: Saccharomyces cerevisiae
Structure: single cells
Main cell structures: cell wall, cell membrane, vacuole, nucleus, mitochondria, rough endoplasmic reticulum
Main energy source: sugars
(a(i))[1]
State the kingdom that yeast is placed in.
(a(ii))[1]
State the process occurring in mitochondria that supplies energy for yeast cells.
(b)[2]
Explain how the shape of a sucrase molecule is linked to its function.
(c)[6]
Describe and explain how pH affects the activity of sucrase shown in Fig. 1.2.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Fungus or Fungi” …