Year 8 Science Cells Test correctly answered 2023

Year 8 Science Cells Test correctly answered 2023 What are cells? Cells are the building block of life. Cells are living organisms that make up everything that is alive. Cells have tiny organelles inside them which keep the cell alive and help the cell do its job. What is the role of the nucleus? The nucleus controls all of the activities of the cell such as chemical reactions in the cell and how the cell reproduces and develops. What is the role of the cell membrane? The cell membrane is the 'skin' around the cell. It controls what comes in and out of the cell. What is the role of the cytoplasm? The cytoplasm is a jelly-like substance inside the cell that contains many of the other organelles. What is the role of the vacuole? The vacuole is the 'rubbish truck' of the cell. It contains waste or chemicals being moved around the cell. It can also contain sap, water and nutrients. In plant cells, the vacuole is large and presses against the cell wall when it is full, making the plant rigid. What is the role of the chloroplast? The chloroplast is the site of photosynthesis. Appears in plant cells and only in the green part of the plant. What is the role of the mitochondria? The mitochondria are the powerhouses of the cells. They turn food into energy. What is the role of lysosomes? Lysosomes are the 'garbage dump' of the cell. Lysosomes are responsible for removing waste from the cell. What is the role of the endoplasmic reticulum? The endoplasmic reticulum is responsible for making pathways in the cell so that materials can move easily around the cell. What is the role of ribosomes? Ribosomes are a structure within cells however are not 'true' organelles because they can be outside of the membrane. They are in charge of proteins for animal growth and repair.