Exam One 2.0 Flashcards
(27 cards)
Bacteriophages free up organic matter so that….
new life can be generated.
What are the phases of lytic bacteriophages?
- attachment
- penetration
- biosynthesis
- maturation
- release
We are _____% Virus
8
Synytin is a captive retroviral envelope protein involved in…
human placental morphogenesis
Viruses are NOT/do not…
- cells
- possess functional organelles
- produce their own energy or macromolecules
- contain both RNA and DNA (they contain one or the other)
- suseptible to antibiotics
What are pandoraviruses?
HUGE viruses
No known virus has the potential to generate…
ATP (energy synthesis)
Viruses are infectious, ___________
obligate intracellular parasites
The viral genome is comprised of either, ________ or _______.
DNA or RNA
What kind of proteins do viruses possess?
Receptor-binding proteins
The Viral genome directs synthesis by,
cellular systems of many copies of all the viral components
Virions are formed from…
newly synthesized components within the host cell
A progeny virion is a vehicle for…
transmission of the viral genome to the next host cell or organism
Describe variolation
inhaling dried crusts or inoculating the pus from a small pox lesion into a scratch as a form of vaccination
Edward Jenner was almost killed by…
variolation (small box)
Edward Jenner used _______ to vaccinate a young boy
cowbox
What did Leeuwekhoek discover?
microorganisms by observing “wee animalcules in drops of rain or sea water”
What did Pasteur’s experiments show?
- boiled medium remained free of microorganisms as long as airborne molecules were prevented from entering.
- disproved spontaneous generation
What do Koch’s postulates show?
the association between particular microorganisms and disease
Kochs postulates led to the demonstration that…
anthrax was caused by Bacillus anthracis in cattle AND that Myobacterium tuberculosis causes tuberculosis in humans
What was the first report of a pathogenic agent smaller than any known bacterium?
The tobacco mosaic disease in 1892, which was observed by Ivanovsky
Ivanovsky observed that TMD was not…
retained by a filter
Loeffler and Frosch were students of Koch who observed and found what?
they observed that the causative agent of foot and mouth disease was filterable and found that it could replicate only in the host organism
How did Loeffler and Frosch determine that the virus they were looking at could only replicate in the host organism?
it did not replicate in solutions that support bacteria growth
