(b) This photograph was taken using a transmission electron microscope. The structure of the organelles visible in the photograph could not have been seen using an optical(light) microscope. Explain why. [2] (Total 4 marks) Q4. (a) The table shows some features of cells. Complete the table by putting a tick in the box if the feature is present in the cell. Cell Feature Epithelial cell from Epithelial cell from Cholera bacterium intestine alveolus of lung Cell membrane Flagellum Nucleus (b) The diagram shows part of an epithelial cell from an insect’s gut. This cell is adapted for the three functions listed below. Use the diagram to explain how this cell is adapted for each of these functions. Use a different feature in the diagram for each of your answers. (i) the active transport of substances from the cell into the blood [2]
(b) This photograph was taken using a transmission electron microscope. The structure of the organelles visible in the photograph could not have been seen using an optical(light) microscope. Explain why. [2] (Total 4 marks) Q4. (a) The table shows some features of cells. Complete the table by putting a tick in the box if the feature is present in the cell. Feature Cell Cholera bacterium Epithelial cell from intestine Epithelial cell from alveolus of lung Cell membrane Flagellum Nucleus (b) The diagram shows part of an epithelial cell from an insect’s gut. This cell is adapted for the three functions listed below. Use the diagram to explain how this cell is adapted for each of these functions. Use a different feature in the diagram for each of your answers. (i) the active transport of substances from the cell into the blood [2]