Biology Class 11 Chapter 6 Notes

• Our comprehensive Biology Class 11 Chapter 6 Notes will ensure you're fully prepared for your exams.
• Important Multiple Choice Questions for MDCAT Preparation from the chapter no 6 Kingdom Prokaryotae class 11.
• Name general characteristics that could be used to define the prokaryotes.
• Do any other microbial group besides bacteria have prokaryotic cells?
• In which habitats are bacteria found? Give some general means by which bacteria derive nutrients.
• List functions that the cell membrane performs in bacteria.
• What are mesosomes and some of their possible function?
• What is unique about the structure of bacterial ribosomes?
• Draw the three bacterial shapes?
• Name a bacterium that has no cell wall.
• A gram stain discharge from an abscess shows cocci in irregular grape like clusters. What is the most likely genus of the bacterium?
• Draw an outline and label (i) Streptococcus, (ii) Diplococcus, (iii) Staphylococci.
• You observe a culture of predominantly round (presumably spherical) bacteria that though apparently fully divided, nevertheless have failed to
• separate, thus resulting in long chains of cells. What, generally might you call such an arrangement?
• Match the following description with the best answer.
• Differentiate between Eubacteria and Archaeobacteria.
• Enlist taxonomic groups of bacteria on the basis of presence of flagella and pattern of attachment of flagella.
• Write Koch postulates of Germ Theory of disease.
• Is there any similarity between Bacteria and Plant cell wall?
• Enlist the achievements of Louis Pasture in the field of microbiology?
• Differentiate between Tetrad and Sarcina.
• Differentiate between Spores and Cyst.
• Differentiate between Gram-positive and Gram-negative bacteria.
• What is the difference between photosynthesis in plants and photosynthesis in bacteria?
• What is flagella? What are the important functions performed by flagella?
• What is pilli? Describe its functions.
• Give the economic importance of cyanobacteria.
• What is super blue green algae?
• How the photosynthetic system of cyanobacteria resembles that of eukaryote?
• Describe the four distinct phases recognized in bacterial growth curve.
• Differentiate between Capsule and Slime.
• What are cyanobacteria? Also describe size, and locomotion.
• What are antibiotics? How misuse of antibiotics effect human health?
• What is the ecological importance of bacteria?
• What is the sterilization process? How dry and moist heat are effective in killing bacteria?
• Differentiate between Parasitic/Pathogenic bacteria and Saprophytic/Non-pathogenic bacteria.
• Differentiate between Flagella and Pilli.
• What are plasmids? What is the role played by the plasmids?
• Name the substances that bacteria store. Also name the common waste materials of bacteria.
• Differentiate between Nucleus and Nucleotide.
• What is the type of asexual reproduction in bacteria?
• How electromagnetic radiations are effective in killing bacteria? And how heat sensitive compounds are sterilized?
• Differentiate between Micobicidal and Microbistatic effect.
• What is the Hormogonia? Also differentiate between Heterocyst and Akinetes.
• Differentiate between Disinfectants and Chemotherapeutic Agents.
• Classify the bacteria on the basis of respiration?
• Differentiate between Photosynthetic and Chemo-synthetic bacteria.
• what is pilli? These are hollow, non-helical, filamentous appendages. • Pilli are smaller than flagella and are not involved in motility. • True pili are only present in gram-negative bacteria. • They are made up of special protein called pilin. Function: • They are primarily involved in a mating process between cells called conjugation process.
• what is super blue green algae? Super blue green algae: Super blue green algae are basically expensive pond scum, in which cyanobacterium is a single called organism that produces its own food through photosynthesis. It serves as a "complete whole food" which contains 60% protein with all essential amino acids in perfect balance.
• what are cyanobacteria? Also describe size, and locomotion. Ans: Cyanobacteria: The cyanobacteria are the largest and most diverse group pf photosynthetic bacteria which was previously known as "blue green algae". • Cyanobacteria are true prokaryotes. • They may be unicellular, exist as colonies of many shapes, or form filaments consisting of trichomes surrounded by mucilaginous sheath. size of cyanobacteria: • They range in diameter from about 1 - 10 micro meter. Locomotion in cyanobacteria: • They lack flagella and often use gas vesicles to move in the water, and many filamentous species have gliding motility.
• what are plasmids? What is the role played by the plasmids? Ans: Plasmid: Many bacteria contain plasmid in addition to chromosomes. These are the circular, double stranded DNA molecules. • They are self-replicating and are not essential for bacterial growth and metabolism.