AQA COMBINED SCIENCE Biology 1F Foundation TRILOGY (9-1) 2021 Paper 1 With full mark answers and explanation

Figure 1 shows an animal cell. Figure 1 All living things are made of cells, the smallest units of life, and there are only two main types of cells: Prokaryotes, which are the primitive, simple cells of bacteria and their bacteria-like cousin's archaea Eukaryotes, which include the more advanced cells of animals, plants, fungi, protozoans, algae, and slime & water moulds. Prokaryotic cells are significantly smaller than Eukaryotic cells 0 1 . 1 What is structure A? [1 mark] Tick one box. Cell membrane Cell wall Chromosome Cytoplasm cell membrane which controls the passage of substances in and out of the cell 0 1 . 2 What is structure B? [1 mark] Tick one box. Chloroplast Mitochondria Nucleus Vacuole YES YES nucleus contains genetic material, which controls the activities of the cel 0 1 . 3 Figure 2 shows a sperm cell. Figure 2 Describe how a sperm cell is adapted to carry out its function .[1 mark] A sperm cell has a tail so it can swim to an egg A sperm cell has many mitochondria to release energy to swim Fertilises an egg cell - female gamete The head contains genetic information and an enzyme to help penetrate the egg cell membrane. The middle section is packed with mitochondria for energy. The tail moves the sperm to the egg. 0 1 . 4 Substances can move into and out of cells by three processes. The diagrams show the concentration of different substances inside and outside a root hair cell. How would each substance move into the root hair cell? [2 marks] Draw one line from each root hair cell to the correct process. Diffusion Osmosis Active transport