5. The mitotic cell cycle
A section of Biology, 9700
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is a photomicrograph of plant root cells near the growing tip. Some of the cells are undergoing mitosis. A C 20 +m B D State one feature, visible in , which indicates that the section is taken from plant tissue and not animal tissue. State the letter, A to D, of the cell in which is in: prophase anaphase. Describe two events occurring in cell B. 1. 2. Describe the role of mitosis in a growing plant root tip. Mutations can sometimes occur in cells which are rapidly dividing. Outline how a mutation can cause an altered polypeptide to be produced. Calculate the magnification of . Show your working and give your answer to the nearest whole number. magnification ×
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THEORY
2014
Paper 2, Variant 3
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