Who we are
Impact
Student
Tutor
Class 11
NCERT Exemplar
Chapter 1: The Living World
37 questions
Chapter 2: Biological Classification
33 questions
Chapter 3: Plant Kingdom
28 questions
Chapter 4: Animal Kingdom
45 questions
Chapter 5: Morphology of Flowering Plants
42 questions
Chapter 6: Anatomy of Flowering Plants
52 questions
Chapter 7: Structural Organization in Animals
48 questions
Chapter 8: Cell: The Unit of Life
39 questions
Chapter 9: Biomolecules
31 questions
Chapter 10: Cell Cycle and Cell Division
43 questions
Chapter 11: Transport in Plants
66 questions
Chapter 12: Mineral Nutrition
39 questions
Chapter 13: Photosynthesis in Higher Plants
59 questions
Chapter 14: Respiration in Plants
42 questions
Chapter 15: Plant Growth and Development
48 questions
Chapter 16: Digestion and Absorption
34 questions
Chapter 17: Breathing and Exchange of Gases
32 questions
Chapter 18: Body Fluids and Circulation
42 questions
Chapter 19: Excretory Products and their Elimination
44 questions
Chapter 20: Locomotion and Movement
39 questions
Chapter 21: Neural Control and Coordination
31 questions
Chapter 22: Chemical Coordination and Integration
39 questions
Solving time: 3 mins
What are plasmids? Describe their role in bacteria.
Views: 5,795 students
Text solution
Verified
Role of Plasmids in Bacteria
Plasmids are the extrachromosomal circular, independently replicating unit besides nucleoid in the bacterial cell.
Plasmids are used to transfer the information from one cell to another, i.e., transfer of important genes (e.g., they may confer resistance of particular, antibiotics to their bacterial cells), enable to metabolise a nutrient, which normally a bacteria is unable to. It also helps in conjugation of bacteria. These days, plasmids are used in a variety of recombination experiments, as cloning vectors. A such example of plasmid vector is given below in figure.
Practice more questions from Biology Exemplar (NCERT Exemplar)
Practice questions from Biology Exemplar (NCERT Exemplar)
Views: 6,101
Views: 5,660
Practice more questions from Cell: The Unit of Life
Views: 5,081
1. Living cytoplasmic structures are called cell organelles/cell inclusions.
2. Nucleoid is found in prokaryotic cells/eukaryotic cells.
3. Ingrowths of plasma membrane of a bacterium are called polysome/mesosomes.
4. Loily sized and tubular structures found in Grant-ve bacteria and helping in conijugation are called pili/fintbriae.
5. Proteins form about of plasma membrane.
6. Water resistant barrier of plasma membrane is formed by protein/phospholipid molecules.
7. When a flaccid cell is placed in a hypotonic solution, it becomes plasmolysed/deplasmolysed.
8. ER/Golgi complex is involved in glycosylation of proteins.
9. Naked sub-cellular organelle is lysosome/ribosome.
10. Enzymes of Kreb's cycle are found in outer chamber/inner chamber/inner membrane of mitochondrion.
11. Light-independent reactions of photosynthesis occur in thylakoids/stroma of chloroplast.
12. microtubular arrangement is found in Basal body/ flagellum.
13. Gas vacuoles/contractile vacuoles help in osmoregulation.
14. Lightly stained and transcriptionally active part of chromatin is called euchromatin/heterochromatin.
15. A chromosome with a centromere near its centre is called Acrocentric/metacentric/submetacentric chromosome.
Practice questions on similar concepts asked by Filo students
Views: 5,759
During photosynthesis the proton are transferred across the thyalakoid membrane into the lumen because
Views: 5,239
Views: 5,479
Views: 5,982
Stuck on the question or explanation?
Connect with our Biology tutors online and get step by step solution of this question.
| Question Text | What are plasmids? Describe their role in bacteria. |
| Topic | Cell: The Unit of Life |
| Subject | Biology |
| Class | Class 11 |
| Answer Type | Text solution:1 |
| Upvotes | 57 |
