1.1.1 Which ONE of the following is INCORRECT about functions of mitosis? A Repairs damaged tissues B Replaces dead cells C Halves number of chromosomes D Promotes growth 1.1.2 The organelles that synthesise proteins are called... A ribosomes. B mitochondria. C chloroplasts. D nucleoli. When viewing a specimen, the total magnification is 400 x . If the magnification on the eyepiece is 10 x then the magnification on the objective lens is ... A 4 xx . B 40 x . C 200 x . D 400 x . (6)

Let's analyze each question step by step. ### 1.1.1 Functions of Mitosis We need to identify which statement about the functions of mitosis is incorrect. - **A. Repairs damaged tissues**: This is a correct function of mitosis, as it allows for the replacement of cells in damaged tissues. - **B. Replaces dead cells**: This is also a correct function of mitosis, as it generates new cells to replace those that have died. - **C. Halves number of chromosomes**: This statement is incorrect. Mitosis maintains the same number of chromosomes in daughter cells as in the parent cell. It is meiosis that halves the number of chromosomes. - **D. Promotes growth**: This is a correct function of mitosis, as it contributes to the growth of an organism by increasing the number of cells. **Conclusion**: The incorrect statement is **C. Halves number of chromosomes**. ### 1.1.2 Organelles that Synthesize Proteins We need to identify the organelles responsible for protein synthesis. - **A. Ribosomes**: This is correct. Ribosomes are the sites of protein synthesis in the cell. - **B. Mitochondria**: This is incorrect. Mitochondria are involved in energy production, not protein synthesis. - **C. Chloroplasts**: This is incorrect. Chloroplasts are involved in photosynthesis, not directly in protein synthesis. - **D. Nucleoli**: This is incorrect. Nucleoli are involved in ribosome production, but they do not synthesize proteins directly. **Conclusion**: The correct answer is **A. Ribosomes**. ### Magnification Calculation We need to find the magnification on the objective lens given the total magnification and the eyepiece magnification. - Total magnification = Eyepiece magnification × Objective lens magnification - Given: Total magnification = 400x, Eyepiece magnification = 10x Let \( O \) be the magnification of the objective lens. We can set up the equation: \[ 400 = 10 \times O \] To find \( O \): \[ O = \frac{400}{10} = 40 \] **Conclusion**: The magnification on the objective lens is **B. 40 x**. ### Summary of Answers 1.1.1: C. Halves number of chromosomes 1.1.2: A. Ribosomes Magnification: B. 40 x