Biology Notes FA FSc Chapter No 5 A Cellular Life

Biology Notes FA FSc Chapter No 5 A Cellular Life previous MCQs, Previous papers, long questions, short questions, exercise, entry test MCQs and examples.

Biology Notes FA FSc Chapter No 5 A Cellular Life
Biology Notes FA FSc Chapter No 5 A Cellular Life

Virus:

Meaning: “The word virus is dived from the Latin word venom which means poisonous fluid”

Definition: “it is a non-cellular obligate parasite which contains DNA or Rna surrounded by a protein coat.”

Virology:

The branch which deals with the study of the virus is known as virology.”

Question: Give a brief status of viruses in classification.

Status of viruses:

Introduction: Viruses lie on the borderline between living things and nonliving things.

1 Living Characters of the virus:

Viruses are considered as living objects because they possess the major properties of living organisms such as:

  • They possess DNA or RNA
  • They have the ability of reproduction
  • They can produce mutations
  • They can show genetic recombination
  • They can infect other living organisms things
  • They show irritability.

Biology Notes FA FSc Chapter No 5 A Cellular Life pdf download