What is an example of a virus and its single viral protein that accomplishes multiple functions? Why is it that this virus must be so efficient (doing so much with only one protein)? Why is this not the case with humans and pathogens that are relatives of humans?

What is an example of a virus and its single viral protein that accomplishes multiple functions? Why is it that this virus must be so efficient (doing so much with only one protein)? Why is this not the case with humans and pathogens that are relatives of humans?

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter13: Early Life Forms And The Viruses

Section: Chapter Questions

Problem 3CT

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Concept explainers

Virus

Viruses are infectious microscopic agents that can only reproduce in live cells of animals, plants, or microbes and are smaller than bacteria. Vertebrates, invertebrates, plants, protists, and fungi are among their many hosts. Viruses are unable to multiply on their own due to the lack of necessary cellular machinery, but they can guide the cell machinery of a host to make additional viruses by infection. The virus enters and attaches to a particular host cell, injects its genetic material, and reproduces by using the host’s genetic material. Viruses cause infection by taking entry into the host cell and using the host cell’s enzymes and raw materials to multiply.

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Humans often use many proteins to accomplish a single function while many viruses accomplish multiple functions with a single peptide.

1. 1. What is an example of a virus and its single viral protein that accomplishes multiple functions?
  2. Why is it that this virus must be so efficient (doing so much with only one protein)?
  3. Why is this not the case with humans and pathogens that are relatives of humans?

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