Grade 12 students 2019

Consider the following electrochemical reaction: Cu(s)+2Ce4+(aq)⇌Cu2+(aq)+2Ce3+(aq) Which of the following effects increases the cell potential of the reaction? (2018 Entrance) a. Decreasing concentration of Cu(s) b. Increasing concentration of Cu 2+ c. Increasing concentration of Ce 3+ d. Increasing concentration of Ce 4+

Biology Questions for Grade 12 1. Which of the following structures is found in all viruses? A. Ribosomes B. Mitochondria C. Nucleus D. Genetic material (DNA or RNA) 2. What is the primary function of a bacterial cell wall? A. Reproduction B. Photosynthesis C. Protection and maintaining shape D. Protein synthesis 3. Which of the following is a characteristic of viruses but not bacteria? A. They can reproduce independently B. They contain ribosomes C. They require a host cell to replicate D. They can be treated with antibiotics 4. What is the shape of the genetic material in bacteria? A. Linear DNA B. Circular DNA C. DNA with multiple strands D. None of the above 5. Which part of a virus allows it to attach to a host cell? A. Cell wall B. Capsid proteins C. Ribosomes D. Mitochondria 6. What process do bacteria use to reproduce? A. Binary fission B. Mitosis C. Budding D. Fragmentation 7. Which of the following diseases is caused by a virus? A. Tuberculosis B. Tetanus C. Influenza D. Cholera 8. How do antibiotics work against bacteria? A. They inhibit viral replication B. They strengthen the host immune system C. They destroy bacterial cell walls or interfere with protein synthesis D. They increase the size of bacterial cells 9. What is the role of a bacteriophage? A. It helps bacteria reproduce B. It is a virus that infects bacteria C. It provides bacteria with nutrients D. It protects bacteria from antibiotics 10. Which of the following is a common feature of both bacteria and viruses? A. Both have a nucleus B. Both can carry out photosynthesis C. Both contain genetic material D. Both have a cell membrane ANSWERS 1. D. Genetic material (DNA or RNA) 2. C. Protection and maintaining shape 3. C. They require a host cell to replicate 4. B. Circular DNA 5. B. Capsid proteins 6. A. Binary fission 7. C. Influenza 8. C. They destroy bacterial cell walls or interfere with protein synthesis 9. B. It is a virus that infects bacteria 10. C. Both contain genetic material JOIN: @EjereeAcademy JOIN @EjereeAcademy

𝗚𝗮𝗳𝗳𝗶𝗶 𝗛𝗶𝗿𝗺𝗮𝗮𝗰𝗵𝗶𝘀𝗮𝗮 𝗕𝗮𝗱𝗵𝗮𝗮𝘀𝗮 𝗤𝗮𝗿𝘀𝗵𝗶𝗶 3000 𝗤𝗮𝗯𝘂. I.Filannoo. .........𝗻 𝗨𝗺𝗺𝗮𝘁𝗮 𝗢𝗿𝗼𝗺𝗼𝗼 𝗯𝗶𝗿𝗮𝘁𝘁𝗶 𝗜𝗱𝗱𝗼𝗼 𝗚𝘂𝗱𝗱𝗮𝗮 𝗸𝗮𝗻 𝗤𝗮𝗯𝘂𝘂𝗱𝗵𝗮.

𝗞𝗮𝗻𝗻𝗲𝗲𝗻 𝗔𝗸𝗸𝗮𝗺𝗶𝗶 𝗗𝘂𝗯𝗯𝗶𝘀𝘂𝘂 𝗯𝗮𝗿𝗯𝗮𝗮𝗱𝗱𝘂?

𝗞𝗮𝗻𝗻𝗲𝗲𝗻 𝗔𝗸𝗸𝗮𝗺𝗶𝗶 𝗗𝘂𝗯𝗯𝗶𝘀𝘂𝘂 𝗯𝗮𝗿𝗯𝗮𝗮𝗱𝗱𝘂?

𝗞𝗮𝗻𝗻𝗲𝗲𝗻 𝗔𝗸𝗸𝗮𝗺𝗶𝗶 𝗗𝘂𝗯𝗯𝗶𝘀𝘂𝘂 𝗯𝗮𝗿𝗯𝗮𝗮𝗱𝗱𝘂?

𝗞𝗮𝗻𝗻𝗲𝗲𝗻 𝗔𝗸𝗸𝗮𝗺𝗶𝗶 𝗗𝘂𝗯𝗯𝗶𝘀𝘂𝘂 𝗯𝗮𝗿𝗯𝗮𝗮𝗱𝗱𝘂?

𝐊𝐚𝐧𝐧𝐞𝐞𝐧 𝐀𝐤𝐤𝐚𝐦𝐢𝐢 𝐃𝐮𝐛𝐛𝐢𝐬𝐮𝐮 𝐁𝐚𝐫𝐛𝐚𝐚𝐝𝐝𝘂?

👑𝗢𝗱𝘂𝘂 𝗚𝗮𝗺𝗺𝗮𝗰𝗵𝗶𝗶𝘀𝗮𝗮 𝗗𝗶𝗿𝗮𝗮𝗺𝗮𝗮 𝗠𝗶𝗶𝗱𝗵𝗮𝗴𝗮𝗮 𝗔𝘆𝘆𝗮𝗮𝗻𝘁𝘂𝘂 𝗝𝗲𝗱𝗵𝘂 𝗞𝗮𝗿𝗮 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗤𝗼𝗳𝗮𝗮 𝗚𝗮𝗱𝗶 𝗱𝗵𝗶𝗶𝗳𝗮𝗺𝘂 𝗱𝗵𝘂𝗳𝗲𝗲 𝗷𝗶𝗿𝗮. 𝗠𝗮𝗿𝗿𝗲𝗲 𝗞𝘂𝘁𝗮𝗮 𝗵𝘂𝗻𝗱𝘂𝗺𝗮𝗮 𝗞𝗮𝗿𝗮 𝗧𝗲𝗹𝗲𝗴𝗿𝗮𝗺 𝗩𝗜𝗣 𝗞𝗲𝗲𝗻𝘆𝗮𝗮 𝗧𝗼𝗹𝗮𝗮𝗻 𝗶𝗹𝗮𝗮𝗹𝘂𝘂𝗳 𝗕𝗮𝗸𝗸𝗮 𝗩𝗜𝗣 𝗝𝗲𝗱𝗵𝘂 𝗰𝘂𝗾𝗮𝗮𝘀𝗮𝗮👇👇👇

𝐊𝐚𝐧𝐧𝐞𝐞𝐧 𝐀𝐤𝐤𝐚𝐦𝐢𝐢 𝐃𝐮𝐛𝐛𝐢𝐬𝐮𝐮 𝐁𝐚𝐫𝐛𝐚𝐚𝐝𝐝𝘂?

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𝐊𝐚𝐧𝐧𝐞𝐞𝐧 𝐀𝐤𝐤𝐚𝐦𝐢𝐢 𝐃𝐮𝐛𝐛𝐢𝐬𝐮𝐮 𝐁𝐚𝐫𝐛𝐚𝐚𝐝𝐝𝘂?

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𝗞𝗮𝗻𝗻𝗲𝗲𝗻 𝗔𝗸𝗸𝗮𝗺𝗶𝗶 𝗱𝘂𝗯𝗯𝗶𝘀𝘂𝘂 𝗯𝗮𝗿𝗯𝗮𝗮𝗱𝗱𝘂?

𝐊𝐚𝐧𝐧𝐞𝐞𝐧 𝐀𝐤𝐤𝐚𝐦𝐢𝐢 𝐃𝐮𝐛𝐛𝐢𝐬𝐮𝐮 𝐁𝐚𝐫𝐛𝐚𝐚𝐝𝐝𝘂?

𝐊𝐚𝐧𝐧𝐞𝐞𝐧 𝐀𝐤𝐤𝐚𝐦𝐢𝐢 𝐃𝐮𝐛𝐛𝐢𝐬𝐮𝐮 𝐁𝐚𝐫𝐛𝐚𝐚𝐝𝐝𝘂?