MICROBIOLOGY LAB FINAL EXAM HCC
HAROLD KAY ANSWERS COMPLETELY
SOLVED
, Why do we culture bacteria ? - ANSWERTo isolate , identify and study microorganisms
What do you understand by opportunistic pathogens ? - ANSWERNormal inhabitants of
the human body that are non pathogenic but become pathogenic but become
pathogenic when immune system is compromised
What is normal flora? - ANSWERThe native microbial forms that an individual harbors
Give three examples of opportunistic pathogen's - ANSWERCandida albicans,
Pseudonomas aeruginosa, staphylococcus aureus
Examples of true pathogens - ANSWERInfluenza virus, plague bacillus and malaria
protozoan
Know four pathogenic viruses and diseases they cause in humans - ANSWERHuman
papilloma virus - cervical cancer
Human immunodeficiency virus - acquired immunodeficiency syndrome
Hepatitis C - liver cancer
Norwalk virus - acute gastroenteritis
What is lysogeny ? - ANSWERIndefinite persistence of bacteriophage DNA in a host
without bringing about the production of virions
Stages of lysogeny - ANSWERAttachment (adsorption) , entry (penetration) , uncoat (no
uncoat in bacteriophage of animal host cells) and integration
Know the three stages of genetic transfer between bacteria - ANSWERTransformation-
when bacteria assimilates genetic material from its environment (indirect contact )
Transduction- when bacteria transfers genetic materials through a bacteriophage (direct
contact)
Conjugation - when bacteria transfers genetic material through sex pilli ( direct contact )
What are bacteriophages ? - ANSWERA virus that specifically infects bacteria
What is the lytic cycle ? - ANSWERDeath and deterioration of Host cell
Stages of lytic cycle - ANSWERAdsorption - binding of virus to specific molecule on
host cell
HAROLD KAY ANSWERS COMPLETELY
SOLVED
, Why do we culture bacteria ? - ANSWERTo isolate , identify and study microorganisms
What do you understand by opportunistic pathogens ? - ANSWERNormal inhabitants of
the human body that are non pathogenic but become pathogenic but become
pathogenic when immune system is compromised
What is normal flora? - ANSWERThe native microbial forms that an individual harbors
Give three examples of opportunistic pathogen's - ANSWERCandida albicans,
Pseudonomas aeruginosa, staphylococcus aureus
Examples of true pathogens - ANSWERInfluenza virus, plague bacillus and malaria
protozoan
Know four pathogenic viruses and diseases they cause in humans - ANSWERHuman
papilloma virus - cervical cancer
Human immunodeficiency virus - acquired immunodeficiency syndrome
Hepatitis C - liver cancer
Norwalk virus - acute gastroenteritis
What is lysogeny ? - ANSWERIndefinite persistence of bacteriophage DNA in a host
without bringing about the production of virions
Stages of lysogeny - ANSWERAttachment (adsorption) , entry (penetration) , uncoat (no
uncoat in bacteriophage of animal host cells) and integration
Know the three stages of genetic transfer between bacteria - ANSWERTransformation-
when bacteria assimilates genetic material from its environment (indirect contact )
Transduction- when bacteria transfers genetic materials through a bacteriophage (direct
contact)
Conjugation - when bacteria transfers genetic material through sex pilli ( direct contact )
What are bacteriophages ? - ANSWERA virus that specifically infects bacteria
What is the lytic cycle ? - ANSWERDeath and deterioration of Host cell
Stages of lytic cycle - ANSWERAdsorption - binding of virus to specific molecule on
host cell
