Viruses

Question 0

DNA or RNA

Answer 0

Genetic material used by viruses

Question 1

Viruses

Answer 1

Tiny, intracellular parasites that infect living cells; not made up of cells and are therefore not living; completely dependent on host cells due to inability to produce DNA or RNA and have a specificity of host cells; possess genome and evolve to exploit capabilities of host cells

Question 2

Capsid

Answer 2

Protein coat surrounding genetic material in viruses

Question 3

Envelope (Some Viruses)

Answer 3

Membrane is a phospholipid bilateral; proteins derived from host cells

Question 4

Bacteriophages

Answer 4

Viruses that only infect bacteria; have a protein tail and tail fibers the superficially resemble legs

Question 5

Viral Genome Structure

Answer 5

Can be: DNA or RNA; single or double stranded; linear or circular; single or several molecules; 4-1,000 genes

Question 6

Lytic Cycle

Answer 6

Replicative growth; synthesis of viral proteins and replication of viral genetic material after insertion of viral genetic material into host cell

Question 7

Lysogenic Cycle

Answer 7

Dormancy; viral genome is incorporated into host cell DNA after entry of viral genetic material into host cell; virus transmitted to daughter cells via cell division

Question 8

Provirus

Answer 8

Virus that is inserted into a host’s genome

Question 9

Retrovirus

Answer 9

RNA virus that transcribes RNA to DNA; produces a cDNA strand from RNA, then dsDNA