OFFICIAL SUMMER 2025 PEARSON EDEXCEL Pearson Edexcel GCE In Biology (9BI0) Paper 03: General and Practical Principles in Biology MERGED QUESTION PAPER + MARK SCHEME

OFFICIAL SUMMER 2025 PEARSON EDEXCEL Pearson Edexcel GCE In Biology (9BI0) Paper 03: General and Practical Principles in Biology MERGED QUESTION PAPER + MARK SCHEME Answer ALL questions. Write your answers in the spaces provided. 1 Saccharomyces cerevisiae (yeast) is a single-celled organism widely used in brewing and baking. The diagram shows a drawing of a yeast cell, as seen using an electron microscope. cell surface membrane cell wall made of chitin and mannose mitochondrion A cytoplasm containing glycogen granules nucleus containing 16 linear chromosomes vacuole B (a) The actual size of the cell measured from point A to point B is 6 µm. Calculate the magnification of this yeast cell. Give your answer to the nearest whole number.