Viral and fungal structures and characteristics

Question 1

structure of viruses

Answer 1

not true cells, do not fit in classification with prokaryotic or eukaryotic
Capsid or envelope (or both) surrounds nucleic core (nucleocapsid)

Question 1

Replication of viruses

Answer 1

1-Adsorption - viral envelope adheres and fuses with cytoplasmic membrane of host cell
2- Penetration - endocytosis delivers the virion to the interior of host cell
3-Uncoating - outer coverings of virus is removed (exposes nucleic acid core) - DNA or RNA
4-Transcription - Viral DNA used as template to synthesize RNA - genetic instructions direct host cells to being producing viral proteins (normal functions stop)
5- Replication - RNA template used to produce complementary viral DNA (multiple copies of viral genome)
6- Assembly - new viral components are produced and assembled into exact copies of invading virus
7-Release - viruses gain viral envelope when sed by host cell (exocytosis) released, and invade neighbouring healthy cells

Question 2

Fungi

Answer 2

• Opportunistic microorganisms
  -create conditions to limit growth of one population when 2 are growing in the same place
  
  • Complex molds are multicellular - high degree of structural complexity (thread like structures called hyphae that compromise the mycelium of the mold)
  • Spores then can be realised into the environment
  • Yest - unicellular reproduce asexual (budding)
  • Eukaryotic cell structure (complete complex nucleus, cell wall) - cell walls made up of lipids ergosterol instead of cholesterol.
  • Nutrients from dead decaying organic material - not sun