Microbiology chapter 3. Microbiology - Cell structure and Funtion Review for the
ID: 202065 • Letter: M
Question
Microbiology chapter 3. Microbiology - Cell structure and FuntionReview for the exam. Please type for me and explain the concept that I should prepare for the exam. F3.14 Function of Flagella in bacteria F3.17 What is endoflagella? F3.18 Structure and Function of Fimbriae F3.19 Structure and Function of Pili or Pilus (singular) F3.23 Osmosis, the diffusion of water across a semipermeable membrane. F3.24 Effects of isotonic, hypertonic, and hypotonic solutions on cells. F3.25 Function of Bacterial Cytoplasmic Membranes selectively permeable barrier 3 types of Active processes F3.26 what is Group translocation type of transport process?
Explanation / Answer
14. Flagella helps in movement of bacterial cells. These are embededded in cell membrane at operate at the cost of energy from the cell.
17. the spirochetes (the tiny corlk shaped bacteria) have special type of flagella which is wound around the cell. This is called endoflagella.
18. The fimbriae are proteneous external protruding structures in bacteria. The external protrudements help in attachment of two bacterial cells.
19. Pilus are also external protrudements of cells made up of protein. These are longer than fimbriae. These are found a few on the cell.
23. osmosis is the flow of solvent molecules across a semi permeable membrane according to concentration gradient. The net flow of solvent is from low solute concentration solution to high solute concentration.
24. When cells are placed in isotonic solution there is no net flow of solvent hence cell reains in tis normal shape. When the cell is placed in hypotonic solution that means the concentration of solute is low outiside hence some of the water will move into the cell which is the at higher concentration. Hence the cell will be swolen. Opposite to it, when we put the cell in hypertonic solution the water will move out of the cell according the principle of osmosis hence the cell will shrink.
25. Bacterial cytoplasmic membranes carry respiration, selected movement of material in and out of the cell. The respiration is the additional function which occurs in mesosome the infoldings of cell membrane.
Selectively permeable barrier means that the barrier will allow only certain type of molecules to go through it. It will block the others.
The three type of active transport processes are: The Sodium-Potassium pump, Exocytosis (Movement of molecules out of the cell), and Endocytosis (moving molecules inside the cell from outside).
26. Group translocation type process is where the transferred species are chemically modified (like phosphorylation) while being transferred.
29. Endospores are asexualy produced dormant spores which can survive in adverse conditions and grow when the conditions arrive.
31. Archea lack peptidoglycan in cell wall like eukaryotes and unlike bacteria. Various features of archea in protein synthesis also match with eukaryotes.Archea mostly thrive in difficult to live environments like hydrothermal vents, high salts and high temperatures etc.
32. Hami are a class of protenious pilus like structure in some archea.