Which of the following statements about viruses is false?...

Name: Problem 10, Chapter 16: Nester's Microbiology: A Human Perspective
Uploaded: 2021-06-16T13:50:10-08:00
Duration: 54 s
Channel: Eleanor Behling
Description: Which of the following statements about viruses is false? They may a) colonize the skin. b) enter host cells by endocytosis. c) enter host cells by fusion of the viral envelope with the cell membrane. d) induce apoptosis in infected host cells. e) suppress expression of MHC class I molecules on host cells.

Which of the following statements about viruses is false? They may a) colonize the skin. b) enter host cells by endocytosis. c) enter host cells by fusion of the viral envelope with the cell membrane. d) induce apoptosis in infected host cells. e) suppress expression of MHC class I molecules on host cells.

Which of the following statements about viruses is false? They may
a) colonize the skin.
b) enter host cells by endocytosis.
c) enter host cells by fusion of the viral envelope with the cell membrane.
d) induce apoptosis in infected host cells.
e) suppress expression of MHC class I molecules on host cells.

Key Concepts

Viral Colonization

Viral colonization refers to the ability of viruses to persistently reside on or within a particular niche on the host. Unlike many bacteria that can colonize surfaces like the skin, viruses typically require access to host cell machinery for replication and do not colonize surfaces in a static manner.

Viral Entry Mechanisms

Viruses have evolved multiple strategies to enter host cells, including receptor-mediated endocytosis and membrane fusion. Endocytosis allows viruses to be internalized in vesicles after binding to specific cell surface receptors, while fusion involves the merging of the viral envelope with the host cell membrane, releasing the viral contents into the cytoplasm.

Apoptosis Induction

Some viruses can induce apoptosis, which is the process of programmed cell death, in infected host cells. This can serve as a mechanism to facilitate viral spread, evade immune responses, or modulate the local cellular environment to the virus's advantage.

Immune Evasion Strategies

Viruses often employ sophisticated mechanisms to evade the host immune system. One such strategy is the suppression of MHC class I molecule expression on host cells, which reduces the ability of cytotoxic T lymphocytes to recognize and destroy infected cells.

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