BIO 250 | Microbiology Final Exam Questions and Answers (Graded A+ 2023) Straighterline

BIO 250 | Microbiology Final Exam Questions and Answers (Graded A+ 2023) Straighterline. An irregular cluster of spherical cells would be called a/an a. Palisades b. Sarcina c. Staphylococcus d. Streptococcus e. Spirilla 2. The study of the immune response to infection caused by microorganisms is a. Hypersensitivity b. Epidemiology c. Immunology d. Morbidity e. Geomicrobiology 3. What is the maximum number of electrons in the first energy shell of an atom? a. 2 b. 4 c. 8 d. 18 e. 32 4. The movement of molecules from an area of high concentration to an area of lower concentration is called a. Facilitated diffusion b. Diffusion c. Active transport d. Osmosis e. Endocytosis 5. Viral tissue specificities are called a. Ranges b. Virions c. Receptacles d. Tropisms e. Uncoating 6. The periplasmic space is a. Larger in gram positive bacteria b. Made up of lipopolysaccharides and phospholipids c. An important reaction site for substances entering and leaving the cell d. Where peptidoglycan is located e. Absent in gram negative bacteria 7. The scientist/s that proposed that organisms be assigned to one of 3 domains is/are a. Robert Koch and Louis Pasteur b. Antonie van Leeuwenhoek c. Carl Woese and George Fox d. Robert Whittaker e. Francesco Redi 8. For which bacterial genus is mannitol salt agar selective? a. Salmonella b. Streptococcus c. Neisseria d. Staphylococcus e. Escherichia 9. Which of the following does not pertain to helminths? a. In kingdom Protista b. Parasitic worms c. Eggs and sperm used for reproduction d. Often alternate hosts in complex life cycles e. Have various organ systems 10. All of the following pertain to virus envelopes except a. Gained as a virus leaves the host cell membrane b. Gained as a virus leaves the nuclear membrane c. Contain special virus proteins d. Help the virus particle attach to host cells e. Located between the capsid and nucleic acid 11. Classification of viruses into families involves determining all the following characteristics except a. Type of nucleic acid b. Type of capsid c. Presence of an envelope d. Biochemical reactions e. Number of strands in the nucleic acid 12. Helminths are a. Bacteria b. Protozoa c. Molds d. Parasitic worms e. Infectious particles 13. When humans manipulate the genes of microorganisms the process is called a. Bioremediation b. Genetic engineering c. Epidemiology d. Immunology e. Taxonomy 14. What chemical causes death in many eukaryotes because it blocks cytochrome c oxidase? a. Copper b. Iron c. Cyanide d. Oxygen e. Carbon monoxide 15. The outcome of the Gram stain is based on differences in the cell's a. Ribosomes b. Inclusions c. Cell wall d. Cell membrane e. Flagella 16. A fat is called if all carbons of the fatty acid chain are single bonded to 2 other carbons and 2 hydrogens. a. Unsaturated b. Polyunsaturated c. Monounsaturated d. Saturated e. None of the choices are correct 17. The lipid group that serves as energy storage molecules are a. Prostaglandins b. Waxes c. Phospholipids d. Steroids e. Triglycerides 18. Which type of microscope does not use light in forming the specimen image? a. Bright-field b. Dark-field c. Phase-contrast d. Fluorescence e. Electron 19. A confocal scanning optical microscope a. Uses ultraviolet light to form a specimen image b. Shows three-dimensional cell images from the cell surface to the middle of the cell c. Produces specimen images on electron micrographs d. Uses dyes that emit visible light when bombarded by ultraviolet rays e. Requires specimens to be stained 20. Which of the following is found in eukaryotic cells but not in prokaryotic cells? a. Nucleus b. Mitochondria c. Endoplasmic reticulum d. Lysosomes e. All of the choices are correct 21. A type of cofactor would be a. Vitamins b. Metallic ions c. Active sites d. Substrates e. Ribozymes