Virus

Question 1

-Are the smallest infectious agents
-ranging from about 20 nm to 300 nm
in diameter
-contain only one kind of nucleic acid (RNA or DNA) as their genome
-vary greatly in structure,genome organization and expression, and strategies of replication and
transmission.

Answer 1

Virus

Question 2

-Protein coat surrounding nucleic acid

Answer 2

Capsid

Question 3

-extracellular state
-the complete, infective form of a virus outside a host cell, with a core of RNA or DNA and a capsid.

Answer 3

Virion

Question 4

-Nucleic acid and capsid also called
-Some have phospholipid envelope

Answer 4

Nucleocapsid

Question 5

provides protection and recognition sites for host cells

Answer 5

Outermost Layer

Question 6

• Capsid removed
• Virus exist as nucleic acid

Answer 6

Intracellular state

Question 7

-Show more variety in nature of their genomes than do cells
-Primary way scientists categorize and classify viruses
-May be DNA or RNA, but never both (can be dsDNA, ssDNA, dsRNA, ssRNA)
-May be linear and segmented or single and circular
-Much smaller than genomes of cells

Answer 7

Genetic Material of Viruses