MICROBIOLOGY LAB 5 2024 QUESTIONS WITH COMPLETE ANSWERS GRADED A+

MICROBIOLOGY LAB 5 2024 QUESTIONS WITH COMPLETE ANSWERS GRADED A+ 1. When comparing a wet mount preparation to a commercially prepared slide,which of the following characteristics of Protozoa is best observed using a wet mount slide preparation?: mechanism of motility 2. What is the purpose of methylcellulose when preparing a wet mount ofprotozoa?: Methylcellulose increases the viscosity of the mount. 3. What structure is used for motility in Euglena?: flagellum -part of the motility-based group known as flagellates, which move by one or twoflagella 4. significance and location of red spot in Euglena: located towards the anteriorend. -sensory organ that detects light intensity. Protozoa are aquatic and light intensity varies at different depths in the environment. as a result of sensory information, theEuglena can change its depth to enhance photosynthesis and find food 5. Which of the following statements describes true motility?: Movement thatappears to be directed from one position to another 6. Which of the following describes Brownian movement?: Vibratory movementof cells due to their bombardment by water molecules 7. Why are unstained bacterial specimens more difficult to view than stainedspecimens?: Stains provide contrast between the cells and the background. 8. When viewing a hanging drop, it is important to adjust the Abbe condenserusing the iris diaphragm.What is the function of this part of the microscope?- : The Abbe condenser regulates the amount of light that passes upward from thelight source and into the lens system. MICROBIOLOGY LAB 5 2024 QUESTIONS WITH COMPLETE ANSWERS GRADED A+ 9. Which statement is NOT true regarding protozoa?: Single-celled protozoa aresimilar in size to bacteria. 10. true statements of protozoa:some use flagella for motility, can be unicellularor multicellular (most are unicellular), are eukaryotes 11. What is the advantage of observing a hanging drop, compared to a wet mount preparation?: Motility and larger organisms are better viewed in a hangingdrop due to the greater depth. 12. When viewing an unstained, live specimen, how do you distinguish be-tween true motility and Brownian movement?: True motility appears to be di-rected from one position to the next; Brownian movement appears as vibratory movement around a certain position that occurs at a constant rate. 13. Which ofthe following organisms does NOTexhibit true motility?: S.aureus 14. organisms the exhibit true motility: P. vulgaris, B. cereus, P. aeruginosa