Microbiology Final Exam Review – Step-by-Step Study Guidance

Q1. How are animal and plant viruses cultivated?

Background

Topic: Virus Cultivation Methods

This question tests your understanding of laboratory techniques used to grow and study viruses that infect animals and plants.

Key Terms and Concepts:

• Virus cultivation: Growing viruses in controlled environments to study their properties.

• Host cells: Living cells required for viral replication.

• Cell culture, embryonated eggs, live animals, plant tissue culture.

Step-by-Step Guidance

1. Consider why viruses require living cells for replication, unlike bacteria or fungi.

2. List the main laboratory methods for cultivating animal viruses (e.g., cell cultures, embryonated eggs, live animals).

3. Think about how plant viruses are cultivated (e.g., using whole plants, plant tissue cultures, or insect vectors).

4. Reflect on the advantages and limitations of each method (e.g., ethical concerns, cost, ease of observation).

Try solving on your own before revealing the answer!

Q2. How do viruses and host cells interact?

Background

Topic: Virus-Host Cell Interactions

This question explores the mechanisms by which viruses recognize, attach to, and enter host cells, as well as how they hijack cellular machinery.

Key Terms and Concepts:

• Receptors: Specific molecules on host cell surfaces that viruses bind to.

• Attachment, penetration, uncoating, replication, assembly, release.

• Host range, tropism.

Step-by-Step Guidance

1. Identify the steps of viral infection: attachment, entry, replication, assembly, and release.

2. Describe how viruses use specific receptors on host cells for attachment.

3. Explain the mechanisms of viral entry (e.g., membrane fusion, endocytosis).

4. Consider how the virus takes over host cell machinery for replication.

Try solving on your own before revealing the answer!

Q3. What is the name of the acne-causing bacteria?

Background

Topic: Pathogenic Bacteria

This question tests your knowledge of bacteria associated with common human diseases, specifically acne.

Key Terms:

• Genus and species nomenclature (binomial name).

• Normal flora vs. pathogenic bacteria.

Step-by-Step Guidance

1. Recall the scientific name (genus and species) of the bacterium most commonly linked to acne.

2. Think about where this bacterium is normally found on the human body.

3. Consider how this bacterium contributes to the development of acne lesions.

Try solving on your own before revealing the answer!

Q4. What is the name of the bacteria that produces endospores?

Background

Topic: Bacterial Endospores

This question focuses on bacteria capable of forming endospores, which are highly resistant structures.

Key Terms:

• Endospore: A dormant, tough, and non-reproductive structure produced by certain bacteria.

• Genus Bacillus, Genus Clostridium.

Step-by-Step Guidance

1. Recall which genera of bacteria are well-known for endospore formation.

2. Think about the environmental conditions that trigger endospore formation.

3. Consider why endospores are important in clinical and industrial settings.

Try solving on your own before revealing the answer!

Q5. What is SSU RNA and what does it determine? (function as well)

Background

Topic: Molecular Biology – Ribosomal RNA

This question tests your understanding of the small subunit ribosomal RNA (SSU rRNA) and its role in phylogenetics and protein synthesis.

Key Terms and Concepts:

• SSU rRNA: Small subunit ribosomal RNA (16S in prokaryotes, 18S in eukaryotes).

• Phylogenetic analysis, evolutionary relationships.

• Ribosome structure and function.

Step-by-Step Guidance

1. Define what SSU rRNA is and where it is found in the cell.

2. Explain its role in the ribosome during translation.

3. Describe how SSU rRNA sequences are used to determine evolutionary relationships among organisms.

Try solving on your own before revealing the answer!

Q6. What is gluconeogenesis?

Background

Topic: Metabolic Pathways

This question examines your understanding of the biochemical process by which organisms synthesize glucose from non-carbohydrate sources.

Key Terms and Concepts:

• Gluconeogenesis: Formation of glucose from non-carbohydrate precursors.

• Precursors: Amino acids, lactate, glycerol.

• Location: Liver (mainly), kidney.

Step-by-Step Guidance

1. Define gluconeogenesis and contrast it with glycolysis.

2. List the main substrates used in gluconeogenesis.

3. Identify the physiological conditions under which gluconeogenesis is important.

Try solving on your own before revealing the answer!