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Bacteria Video Lecture | Science & Technology for UPSC CSE

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FAQs on Bacteria Video Lecture - Science & Technology for UPSC CSE

1. What are bacteria?
Ans. Bacteria are unicellular microorganisms that are found almost everywhere on Earth. They are prokaryotic organisms, which means they lack a nucleus and other membrane-bound organelles. Bacteria can be beneficial or harmful to humans, animals, and plants.
2. How do bacteria reproduce?
Ans. Bacteria reproduce asexually through a process called binary fission, in which one bacterium divides into two identical daughter cells. This process can occur every 20 minutes in favorable conditions, leading to rapid population growth.
3. What are the different types of bacteria?
Ans. Bacteria can be classified into five main groups based on their shape: cocci (spherical), bacilli (rod-shaped), spirilla (spiral-shaped), vibrios (comma-shaped), and spirochetes (corkscrew-shaped). Bacteria can also be classified based on their staining properties (Gram-positive or Gram-negative) and their metabolic properties (aerobic or anaerobic).
4. How do bacteria contribute to human health?
Ans. Bacteria are essential to human health. They help to digest food, synthesize vitamins, and train the immune system to recognize and fight off harmful pathogens. Some bacteria, such as probiotics, have been shown to improve gut health and boost the immune system.
5. How do antibiotics work against bacteria?
Ans. Antibiotics work by targeting specific structures or processes within bacterial cells, such as the cell wall, protein synthesis, or DNA replication. By disrupting these processes, antibiotics can kill or inhibit the growth of bacteria. However, overuse and misuse of antibiotics can lead to the development of antibiotic-resistant bacteria, which pose a significant threat to human health.
165 videos|338 docs|324 tests
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