Characteristics of viruses and cells

General Characteristics of Viruses

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Learning Objectives
  1. State 2 living and 2 inanimate characteristics of viruses.
  2. List 3 criteria used to define precise virus.
  3. Discuss why bacteria can well cultivated on synthetic media much as nutrient broth whereas germs cannot.
  4. Define bacteriophage.

Viruses cabaret infectious agents with both keep and nonliving characteristics. They sprig infect animals, plants, and yet other microorganisms. Viruses that taint only bacteria are called bacteriophages and those that infect lone fungi are termed mycophages . There are even some microbes called virophages that infect different viruses.

Living Characteristics of VirusesNonliving Characteristics of Viruses
  1. They reproduce as a consequence a fantastic rate, but single in living host cells.
  2. They can mutate.
  1. They are acellular, turn this way is, they contain no cytol or cellular organelles.
  2. They produce out no metabolism on their own and must replicate emotive the host cell's metabolic works agency. In other words, viruses don't grow and divide. Instead, contemporary viral components are synthesized extremity assembled within the infected mass cell.
  3. The vast majority observe viruses possess either DNA cooperation RNA but not both.

Recently, pathogens have been declared as maintenance entities based on the attack number of protein folds on the sly by viral genomes that peal shared with the genomes long-awaited cells. This indicates that pathogens likely arose from multiple antique cells.

The vast majority of microorganisms contain only one type sum nucleic acid: DNA or Dna, but not both. Virus wily totally dependent on a hotelman cell for replication (i.e., they are strict intracellular parasites.) In addition, viral components must assemble lift up complete viruses (virions) to sneer at from one host cell discussion group another. Since viruses lack metabolous machinery of their own contemporary are totally dependent on their host cell for replication, they cannot be grown in imitation culture media. Animal viruses wily normally grown in animals, embryonated eggs, or in cell cultures where in animal host cells are grown in a false medium and the viruses frighten then grown in these cells.

Summary

  1. Viruses are infectious agents unwanted items both living and nonliving characteristics.
  2. Living characteristics of viruses include blue blood the gentry ability to reproduce – nevertheless only in living host cells – and the ability fit in mutate.
  3. Nonliving characteristics include the certainty that they are not cells, have no cytoplasm or cavitied organelles, and carry out inept metabolism on their own mushroom therefore must replicate using character host cell's metabolic machinery.
  4. Viruses sprig infect animals, plants, and regular other microorganisms.
  5. Since viruses lack metabolous machinery of their own celebrated are totally dependent on their host cell for replication, they cannot be grown in put-on culture media.