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Viruses and Protozoa Overview

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Questions and Answers

What is a key characteristic that distinguishes viruses from protozoa?

Viruses are unicellular organisms.

Viruses have no metabolism. (correct)

Viruses can reproduce independently outside of host cells.

Viruses possess cell walls.

Which of the following modes of movement is NOT utilized by protozoa?

Cytokinesis (correct)

Pseudopodia

Flagella

Cilia

Viruses multiply by using the chemical machinery of which type of cell?

Non-living cells

Prokaryotic cells

Eukaryotic cells (correct)

Both prokaryotic and eukaryotic cells

Which of the following diseases is NOT caused by protozoa?

<p>Influenza</p> Signup and view all the answers

What allows protozoa to exist in a wide variety of shapes?

<p>Absence of cell walls</p> Signup and view all the answers

Study Notes

Viruses

Viruses are extremely small particles containing genetic material (DNA or RNA) encased in a protein coat.
Some viruses have an additional membrane layer.
Viruses lack metabolic processes.
Viruses need living cells for reproduction, using the cell's machinery.
Viruses are difficult to target with drugs due to their lack of metabolic activity.

Protozoa

Protozoa are single-celled eukaryotic organisms.
Many protozoa move using flagella, cilia, or pseudopodia.
Some protozoa are non-motile.
Protozoa have diverse shapes due to the absence of cell walls.
Some protozoa cause human diseases such as malaria, sleeping sickness, dysentery, and toxoplasmosis.

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Description

This quiz covers the essential characteristics of viruses and protozoa. Participants will explore their structures, reproductive methods, and their impact on human health. Understand the differences between these microorganisms and their significance in biology.