Phages viruses are usually abundant in the intestine of man and animals because.
Correct answer: A. Abundant bacteria are present
- A. Abundant bacteria are present
- B. Abundant water is present
- C. Abundant nutrients are present
- D. They can only live at human body temperature
Explanation
Phages can translocate through the mucosa to lymph and internal organs and play a role as regulators of the bacterial population in the gut. Increasing abundance of phages in the gut mucosa may reduce colonization by bacteria. Moreover, phages may have an immunomodulatory role in the immune response in the human gut. Bacteriophages play important roles in regulating the intestinal human microbiota composition, dynamics, and homeostasis, and characterizing their bacterial hosts is needed to understand their impact.
This question appeared on the ETEA MDCAT 2008 paper, which you can sit online with every answer explained.
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Viruses are acellular infectious particles made of genetic material enclosed by a protein capsid, sometimes with a lipid envelope. Their replication depends on a host cell and may follow lytic or lysogenic cycles, so viral structure and reproduction differ fundamentally from those of cellular organisms such as bacteria.
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