Lecture 14 Flashcards
Describe features of Protista
Mostly unicellular
Mostly aquatic
Contains flagella or cilia
Sexual and asexual reproduction
Diverse nutrition lifestyles
Link between prokaryotes and eukaryotes
Describe slime mold
Eukaryotic single cell organism
Sexual reproduction (spores)
Ranges in size
Multinucleate (1000s of nuclei in one cell)
Great capacity to move around
What do viruses exist as outside of the cell
Inanimate particles called virions
Where can viruses function and reproduce
Only within living cells
What are the basic properties of viruses
Highly complex and organized
Activity is controlled by genetic program
Can reproduce (yes and no)
Can evolve
What is the structure of viruses
A capsid(protein coat that surrounds nucleic acid)
Enclosed in a protein containing membrane (enveloped) or no (naked or unenveloped)
Nucleic acid either RNA or DNA
What types of cells can viruses infect and the host range
Viruses bind to the surface of specific proteins
Narrow host range: humane colds and influences viruses. Infects epithelial cells of human respiratory system
Wide host range: rabies can infect cells in dogs, foxes, bats, raccoons and humans
How to viruses enter a cell
Binds to the cell surface via specific proteins and then enter the cell
What are the 2 viral life cycles
Non-lytic (lysogenic): vital nucleic acid is replicated in the host and creates viral proteins. Virus DOES NOT destroy host cell
Lytic: production of virus particles ruptured and kills the host cell
How do RNA vaccines work?
Trick the body into producing an antigen from the RNA template
