Microbiology Final Exam Review – Guided Study Notes

Q1. How are animal and plant viruses cultivated?

Background

Topic: Virus Cultivation

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

Key Terms and Concepts:

• Animal viruses: Often cultivated in living animals, embryonated eggs, or cell cultures.

• Plant viruses: Typically cultivated in whole plants, plant tissue cultures, or protoplasts.

Step-by-Step Guidance

1. Consider the differences between animal and plant cells and how this affects the cultivation method.

2. Recall the main laboratory techniques for animal viruses (e.g., use of cell lines, embryonated eggs).

3. Think about how plant viruses are introduced into host plants or tissues.

4. Reflect on why viruses require living cells for replication.

Try solving on your own before revealing the answer!

Q2. How do viruses and host cells interact? (Include specific receptors and mechanisms)

Background

Topic: Virus-Host Interactions

This question examines your knowledge of how viruses recognize, attach to, and enter host cells, focusing on molecular interactions.

Key Terms and Concepts:

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

• Attachment and entry: Mechanisms such as endocytosis or membrane fusion.

Step-by-Step Guidance

1. Identify the role of viral surface proteins in recognizing host cell receptors.

2. Describe how the specificity of these interactions determines host range.

3. Outline the main mechanisms by which viruses enter host cells (e.g., fusion, endocytosis).

4. Consider what happens after entry (e.g., uncoating, 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 recall of the scientific name of the bacterium commonly associated with acne.

Key Terms:

• Genus and species nomenclature

• Skin microbiota

Step-by-Step Guidance

1. Think about the common bacteria found on human skin.

2. Recall which one is most often linked to acne vulgaris.

3. Remember the correct scientific (binomial) name format.

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 asks you to identify bacteria known for their ability to form highly resistant endospores.

Key Terms:

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

• Genera: Bacillus, Clostridium

Step-by-Step Guidance

1. Recall which bacterial genera are famous for endospore formation.

2. Think about examples from your lab report or textbook.

3. Remember the environmental significance of endospores.

Try solving on your own before revealing the answer!

Q5. What is SSU rRNA and what does it determine? (Include its function)

Background

Topic: Molecular Biology – Ribosomal RNA

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

Key Terms and Concepts:

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

• Function: Part of the ribosome, used for evolutionary studies

Step-by-Step Guidance

1. Define what SSU rRNA stands for and where it is found.

2. Explain its role in the ribosome during translation.

3. Discuss why SSU rRNA sequences are used to determine evolutionary relationships.

Try solving on your own before revealing the answer!

Q6. What is gluconeogenesis?

Background

Topic: Metabolic Pathways

This question asks you to describe the process by which organisms synthesize glucose from non-carbohydrate sources.

Key Terms:

• Gluconeogenesis: Formation of glucose from precursors like amino acids, lactate, or glycerol.

• Occurs mainly in the liver.

Step-by-Step Guidance

1. Recall the definition of gluconeogenesis.

2. Identify the main substrates used in this process.

3. Consider why gluconeogenesis is important for organisms.

Try solving on your own before revealing the answer!

Q7. What is the difference between extant and extinct bacteria?

Background

Topic: Microbial Diversity

This question tests your understanding of terminology related to the existence of bacterial species.

Key Terms:

• Extant: Still existing, currently living.

• Extinct: No longer existing.

Step-by-Step Guidance

1. Define 'extant' and 'extinct' in the context of bacteria.

2. Think of examples or how these terms are used in microbiology.

3. Consider why understanding this distinction is important for evolutionary studies.

Try solving on your own before revealing the answer!

Q8. What types of gene transfer are there?

Background

Topic: Microbial Genetics

This question asks you to recall the main mechanisms by which bacteria exchange genetic material.

Key Terms:

• Horizontal gene transfer: Transformation, transduction, conjugation.

• Vertical gene transfer: Parent to offspring.

Step-by-Step Guidance

1. List the three main types of horizontal gene transfer in bacteria.

2. Briefly describe each mechanism.

3. Consider the significance of gene transfer for bacterial evolution and adaptation.

Try solving on your own before revealing the answer!