Microbiology: Infectious Diseases and Bacteria
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Questions and Answers

What is one method by which microorganisms can overwhelm body systems?

  • By engaging in horizontal gene transfer
  • By producing heat shock proteins
  • By rapid increase in population numbers (correct)
  • By generating hydrogen peroxide

What is a defining characteristic of bacteria in contrast to eukaryotic organisms?

  • Complex cell organelles
  • Presence of a mitochondria
  • Lack of a nucleus or nuclear membrane (correct)
  • Lower metabolic activity

How do viruses typically inflict damage on the body?

  • By forming biofilms to block cellular pathways
  • By secreting enzymes that lyse cells
  • By producing antibiotic substances
  • By replicating within tissue cells (correct)

Which of the following forms do bacteria NOT typically take?

<p>Cubic (cuboids) (C)</p> Signup and view all the answers

What is the primary component that differentiates viruses from bacteria?

<p>The structure of their genetic material (D)</p> Signup and view all the answers

Flashcards

Disease-causing Microorganisms

Microorganisms that cause infectious diseases by overwhelming body systems or producing toxins that disrupt normal body functions.

How Viruses Cause Damage

Viruses cause damage by replicating within cells and causing tissue degeneration.

Bacteria

Simple, single-celled organisms lacking a nucleus. They can be shaped like rods, spheres, or spirals.

Bacilli

Rod-shaped bacteria.

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Cocci

Spherical-shaped bacteria.

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Study Notes

Microorganism-Caused Infectious Diseases

  • Some microorganisms cause infectious diseases by overwhelming the body with large numbers or by producing harmful toxins.
  • These toxins disrupt normal body functions.

Viral Damage

  • Viruses damage tissue by replicating inside cells, leading to cell breakdown.

Bacteria: Structure and Form

  • Bacteria are simple, prokaryotic organisms that lack a nucleus and nuclear membrane.
  • Bacteria can have various shapes: rod-shaped (bacilli), spherical (cocci), or spiral (spirilla or spirochetes).

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Description

This quiz explores the role of microorganisms in causing infectious diseases, detailing how they overwhelm the body and the toxins they produce. It also covers the structure and forms of bacteria, including their various shapes and impact on human health.

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