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48 Cards in this Set

  • Front
  • Back
Obligate intracellular parasites are
Viruses
The genetic material of viruses could be
DNA or RNA
Capsomeres are
?
Viral envelopes always surround the _____
Capsid
In order to classify viruses, scientists have devised a very sophisticated taxonomic system. True/False
False
Which of the following represents the correct sequence of reproductive events of a retrovirus in a host?
C?
Viruses that infect bacteria
Bacteriophages
What infectious pathway is characterized by the immediate destruction of the host?
Lytic
Bacteriophages that do not cause immediate destruction of their host
Temperate phages?
Vertical transmission refers to
Infection of plants by viruses via asexual transmission or infected seeds
Viroids
Posses no capsid and have RNA
Plasmids are found in
Bacteria and Eukaryotic yeast?
Plasmids are composed of
Circular DNA
Protein-like polypeptide chains of approximately 250 amino acids long that can cause Bovine Sponge Encephalopathy
Prions
Segments of DNA that can move from one part of the genome to another
Transposons
A prophage can convert an otherwise harmless bacterium into a very pathogenic one
True
Plasmodesmata
Found in plant cells and viruses use them to their advantage
Viruses are classified based on:
1) The nucleic acid they possess
2) ?
3) Capsid shape
All viruses are species specific
False?
Capsids of RNA viruses are produced through transcription and translation of the viral genome
True?
New bacterial strains are produced through genetic recombination. One process of genetic recombination involves the uptake of naked DNA and it is called
?
0
0
0
0
During conjugation, the bacterium that possesses the pili is considered to be the
Donor, Male
The F factor can exist as a
?
When the F+ Plasmid is incorporated into the bacterial chromosome it is called
Hfr recombinant bacterium
What do transposons and plasmids have in common?
D?
There are bacteria that possess introns. True/False
True
How do bacteria divide?
Binary fission
The trp operon is __ by default.
?
The repressor i the trp operon
?
When tryptophan is present
?
The lac operon is
?
In the lac operon the product of the regulatory gene
?
"The laws of physics and chemistry remain unchanged through Earth's history" represents the concept of
Uniformitarianism
The immutability of species theory is the same as
Fixity of species theory
All living things are organized into a system of increasing complexity according to
Lamarck?
According to Malthus, population growth is ____ and resource growth it ____.
arithmetic, geometric
A variational hypothesis was presented by
?
Structures or organs with the same origin but different functions are referred to as
?
Descent with modification means that
Certain different species share a common ancestor
Evolution refers to adaptation of individual organisms. True/False
False
Evolution refers to populations. True/False
True
If at t=0 you have 4 bacteria how many hours is it going to take in order for them to become 32 in ideal conditions?
?
During bacterial replication, the highest reproductive activity is observed during the
Log phase
An R plasmid provides bacteria with resistance to antibiotics. True/False
?
Bacteria have nucleoids, not a nucleus
?
The more similar the genetic makeup of organisms is the more closely related they are
?