Fig. 1.1 shows a transmission electron micrograph of a section of an animal cell.
(a)[3]
Calculate the true width of the organelle labelled A, shown by line X-Y. State the formula you will use and show your working. Give your answer in $\mu\text{m}$ and to one decimal place.
(b(i))[2]
Identify organelle A and state what it does in cells.
(b(ii))[2]
Identify the cell structure labelled B and give one reason for your choice.
Worked solution & mark scheme
This 7-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Applies formula actual length = image length \div magnification (A = I/M, M = I/A, I = A \times M)” …