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Phage typing is based on the fact that?
Bacterial viruses attack specific cells
What is phage typing used to identify?
It is used to identify single strains of bacteria therefore, tracing the outbreak of infections.
What does a phage inject when it attaches to a bacterium?
Dna and phage body
What is the need for phage titration?
PHAGE TRTRATION IS DONE SO AS TO FIND THE AMOUNT OF PHAGE PARTICLES PRESENT IN THE STOCK PHAGE TRTRATION IS DONE SO AS TO FIND THE AMOUNT OF PHAGE PARTICLES PRESENT IN THE STOCK
A virus that reproduces in a bacterium is called?
phage
What is another term for a lysogenic phage?
temperate phage
When phage attaches to a bacteria the phage injects what?
DNA single
What is temperate phage superinfection immunity?
c. Repression of the phage genome - A phage coded protein, called a repressor, is made which binds to a particular site on the phage DNA, called the operator, and shuts off transcription of most phage genes EXCEPT the repressor gene. The result is a stable repressed phage genome which is integrated into the host chromosome. Each temperate phage will only repress its own DNA and not that from other phage, so that repression is very specific (immunity to superinfection with the same phage).Reference: http://pathmicro.med.sc.edu/mayer/phage.htm
What are temperate phages?
A phage that can enter into lysogeny with its host. A phage that can become a prophage.
What enzyme distinguishes staphylococci from streptococci?
Catalase. Staphylococci are catalase positive. Streptococci are catalase negative.
What is the plural form of staphylococcus?
The plural form of staphylococcus is staphylococci.
When a phage attaches to a bacterium what does the phage inject and what stays attached to the cell?
The part that remains outside is called the capsid or protein coat.
