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Bio171 Exam Prep: Comprehensive Q&A for Microbiology, Quizzes of Biology

Virginia State University (VSU)Biology

A comprehensive set of questions and answers designed to help students prepare for a bio171 exam, focusing on microbiology. It covers a wide range of topics, including virus classification, cell biology, macromolecules, organism classification, metabolic processes, microscopy techniques, microbial growth, and various diseases. The questions are structured to test understanding of key concepts and principles, making it an excellent resource for exam preparation and review. The material includes true/false questions, definitions, and problem-solving exercises, enhancing critical thinking and knowledge retention. This resource is ideal for students seeking to reinforce their understanding of microbiology and improve their exam performance. It offers detailed explanations and covers essential topics in a clear and concise manner, making it a valuable study aid.

Typology: Quizzes

2025/2026

Available from 12/10/2025

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Bio171 Exam Prep Questions with Correct Solutions
1. A virus is classified as a microbe.
True. Although viruses are not living and as such are not considered microorganisms,
they can, however, be classified as microbes, a more general term that includes
microorganisms and viruses.
2. True or False: The smallest biological unit of life is the molecule.
False. The smallest biological unit of life is the cell.
3. What are the 4 main types of macromolecules found in cells?
Proteins, Lipids, Nucleic acids and Polysaccharides
1. Animalia, Plantae, Fungi and Protista are all classification under what type of organism?
A. Bacteria
B. Eukarya
C. Archaea
D. Virus
B. Only Eukarya contains animals, plants, fungi and protists.
2. All multicellular microorganisms classified as Animalia are autotropic.
False—they are heterotropic.
3. Microorganisms classified as obtain most of their energy by converting
light energy into chemical energy.
Plantae
1. Define anabolism.
Anabolism is the process of building up or biosynthesis of macromolecules from small
molecular units into much larger complexes.
2. In order to convert proteins into amino acids which metabolic process would be active?
Catabolism would be active as proteins are made up of amino acids. Therefore the process
described (proteins into amino acids) is the breakdown, or catabolism of protein.
1. In phosphorylation, the light reactions always occur where?
The process of converting light energy into chemical energy (photophosphorylation) always
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Download Bio171 Exam Prep: Comprehensive Q&A for Microbiology and more Quizzes Biology in PDF only on Docsity!

Bio171 Exam Prep Questions with Correct Solutions

  1. A virus is classified as a microbe. True. Although viruses are not living and as such are not considered microorganisms, they can, however, be classified as microbes, a more general term that includes microorganisms and viruses.
  2. True or False: The smallest biological unit of life is the molecule. False. The smallest biological unit of life is the cell.
  3. What are the 4 main types of macromolecules found in cells? Proteins, Lipids, Nucleic acids and Polysaccharides
  4. Animalia, Plantae, Fungi and Protista are all classification under what type of organism? A. Bacteria B. Eukarya C. Archaea D. Virus B. Only Eukarya contains animals, plants, fungi and protists.
  5. All multicellular microorganisms classified as Animalia are autotropic. False—they are heterotropic.
  6. Microorganisms classified as obtain most of their energy by converting light energy into chemical energy. Plantae
  7. Define anabolism. Anabolism is the process of building up or biosynthesis of macromolecules from small molecular units into much larger complexes.
  8. In order to convert proteins into amino acids which metabolic process would be active? Catabolism would be active as proteins are made up of amino acids. Therefore the process described (proteins into amino acids) is the breakdown, or catabolism of protein.
  9. In phosphorylation, the light reactions always occur where? The process of converting light energy into chemical energy (photophosphorylation) always

occurs in the membrane.

  1. True or False: LB agar is classified as a selective, non-differential media. False. LB agar is the most basic type of agar and like LB media supports the growth of virtually all microbes without restriction.
  2. What is agar used for in microbiology? Agar is used to create a solid, smooth surface on which microbes can grow.
  3. True or False. When performing a dilution streak a new (or sterilized) loop must be used for each phase. True. Failure to do so would prevent the establishment of a dilution gradient, as the same bacterial concentration would be spread across both phase regions.
  4. In order to encourage growth of a slow growing microbe what might a researcher do during a phase dilution streak? A researcher may either (1) opt to perform only a 3-phase dilution streak or (2) pass the loop through the previous phase multiple times (as opposed to only once).
  5. True or False. To restrict the growth of a pathogenic microbe a researcher might decrease an incubator from 37°C to 25°C. True. Pathogenic strains of bacteria tend to grow faster than non-pathogenic strains at 37°C, so researchers may set incubators at 25°C to restrict its growth.
  6. Match the following symptoms with their respective diseases:
  7. Folliculitis D A. Childhood skin disease near mouth/nose
  8. Scalded-skin syndrome E B. Infection of thin, transparent scleral tissue
  9. Impetigo A C. Infection occurs at time of birth
  10. Conjunctivitis B D. Pus-filled lesions on skin or hair
  1. Ophthalmia Neonatorum C E. Ruptured pustules; treated with Penicillin
  2. True or False. The causative agent of conjunctivitis can be either bacterial or viral. True. There are bacterial (staph) and viral forms of conjunctivitis, both resulting in the inflammation of the conjunctiva and ‘pink eye.’
  3. True or False. Although there is no cure for tetanus, it can be prevented through vaccination. True. There is no cure for tetanus. However, tetanus is entirely preventable through vaccination.
  4. Describe the symptoms and treatment regimen for someone infected with Clostridium perfringens. Clostridium perfringens (also known as Gas gangrene) presents with muscle necrosis, swelling of infected areas, fever and intense gas production. Treatment entails removal of all infected tissue, often resulting in amputation of the affected areas, in conjunction with heavy antibiotic therapies.
  5. Why does the alpha toxin (perfringolysin) produced during an infection of gas gangrene cause cell death? The toxin perforates the membrane. It forms pores in the plasma membrane of host cells resulting in uncontrolled ion fluxes and eventually cell lysis and death.
  6. The surrounds the capsid of some viruses. Envelope.
  7. True or False. You would expect to see a viral envelope on a virus infecting a plant cell. False. The overwhelming majority of animal viruses are enveloped whereas the majority of plant or bacteria-infecting viruses are not.
  8. Rank the following viruses based on their size from largest to smallest: Orthomyxovirus Poliovirus Variolavirus
  1. What linear, double-stranded, enveloped DNA virus is the first virus (as of Oct. 26, 1977) to be officially declared eradicated? Smallpox (Variola virus). Although once a major cause of death in the world, a smallpox vaccine was developed in 1796 by Edward Jenner. Global vaccination efforts have prevented smallpox from appearing in humans since October 26, 1977, making smallpox the first infectious disease ever to be eradicated.
  2. What small (~30nm) single-stranded, non-enveloped RNA virus targets the CNS (central nervous system), causing potentially catastrophic damage to motor neurons? Polio, also known as poliomyelitis.
  3. By whom and where was the first Polio vaccine developed? Jonas Salk and his research team developed the polio vaccine at the University of Pittsburgh in 1955.
  4. Which subtype of Influenza is the most virulent? Influenza A.