Pearson Edexcel Level 3 GCE 2022 Biology B Advanced Subsidiary PAPER 1: Core Cellular Biology and Microbiology

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Answer ALL questions. Some questions must be answered with a cross in a box . If you change your mind about an answer, put a line through the box and then mark your new answer with a cross . 1 A st... udent drew two types of white blood cell, from a slide viewed using a light microscope. X Y Cell A Cell B The student used the internet to research the actual diameter of these two types of cell. The student found several values for the diameters of cell A and cell B. They used the mean value for the diameter of cell B to calculate the magnification of the drawing of cell B. The student calculated the magnification of the drawing of cell B to be × 1571. The student found the following values for the diameter of cell A: 0.016 mm, 0.022 mm, 0.019 mm, 0.021 mm, 0.017 mm. (a) Calculate the magnification of the drawing of cell A, using the mean diameter of this cell. Measure the diameter of cell A between the points X and Y on the diagram. [Show More]

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