1. Give the distinguishing features of bacteria, virus and mycoplasma.
2. “Bacteria are both good and bad associates of human civilisation". J
3. Discuss briefly what do you know about PPLO and bacteriophage.
4. Explain the various methods of reproduction found in bacteria.
5. Write an essay on food value of bacteria.
6. Briefly describe the ulta-structure of a bacterium, TMV and bacteriop
7. Describe the characteristics of mycoplasma. How are they differe
viruses? Mention some of the plant diseases caused by PPLO.
8. Describe the structure and economic importance of bacteria.
9. Give an account of the structure and nature of plant viruses.
10. Give an account of symptoms of viruses. Describe their nature also.
11. Write about the methods of reproduction in bacteria.
12. What are viruses? Are they living or non-living agents? Give th
transmission
13. What are the procaryotic and eucaryotic cells? Which of the
type and why?
Answers
Answer:
1.Mycoplasma (plural mycoplasmas or mycoplasmata) is a genus of bacteria that lack a cell wall around their cell membranes. This characteristic makes them naturally resistant to antibiotics that target cell wall synthesis (like the beta-lactam antibiotics). They can be parasitic or saprotrophic.
2.Some bacteria are good for you, while others can make you sick. Bacteria are single-celled, or simple, organisms. Though small, bacteria are powerful and complex, and they can survive in extreme conditions. Bacteria have a tough protective coating that boosts their resistance to white blood cells in the body.
3.The full form of PPLO is Pleuron pneumonia-like organisms and the term used to describe the mycoplasmas. PPLO is the smallest cell or organism with the size of between 0.1 and 0.3 mm. Mycoplasma has included species discovered from pleural fluid of cattle suffering from pleuropneumonia.Bacteriophage, also called phage or bacterial virus, any of a group of viruses that infect bacteria.
4.Bacteria reproduce by binary fission. ... Binary fission begins when the DNA of the bacterium divides into two (replicates). The bacterial cell then elongates and splits into two daughter cells each with identical DNA to the parent cell.