LSU BIOL 2051 Exam 1 Questions with 100% Verified
Answers Latest Update
Question: What is phagocytosis?
Answer:
cell eating
Question: What is chemoattractant?
Answer:
A chemical byproduct produced by a cell (e.g., a bacterium) that attracts a different cell
(e.g., a white blood cell).
Question: What is Brownian Motion?
Answer:
random movement of particles
Question: A neutrophil is the _______ to bacterial infections?
Answer:
The first responders
Question: True or false: Humans have a nucleus in RBC and neutrophils dont
Answer:
False
Question: Steps of neutrophil response to bacterial infections?
Answer:
1. Bacteria releases chemoattractant(scent trail)
2. Neutrophil surface receptors detect trai;
3. Neutrophil rearranges to have a back and a front
4. Neutrophil crawls towards bacteria
5. Neutrophil expands cell membrane
6. neutrophil swalos th bacteria and destroys it.
Question: Why are neutrophils called the first responders?
Answer:
The are the most abundant WBC therefore they are often the ones to encounter these
bacteria.
Question: What are the two parts of binomial nomenclature?
, Answer:
Genus and Species
Question: How is the scientific name written when types vs handwritten?
Answer:
Typed is ITALICIZED
Writtend is UNDERLINES
Question: Why is binomial nomenclature important?
Answer:
everyone around the world uses the same name for an organism which makes
communication easier
Question: Who performed the bacterial transformation experiment?
Answer:
Frederick Griffith
Question: What organisms did Griffith study?
Answer:
Streptococcus pneumoniae
Question: What does the S strain stand for?
Answer:
Smooth
Question: Why is the S strain smooth?
Answer:
It has a polysaccaride capsule.
Question: Is the S strain virulent or non virulent?
Answer:
Virulent, killed mouse
Question: What does R strain stand for?
Answer:
Rough
, Question: Does the R strain have a capsule?
Answer:
No
Question: Is the R strain virulent?
Answer:
No
Question: What is bacterial transformation?
Answer:
Uptake of genetic material that changes baceriums characeristics.
Question: Why did the mouse die after recieving live R cells and heat-killed S cells?
Answer:
DNA from the dead S cellls transformed the R cells into virulent S cells.
Question: What does biovar classify?
Answer:
Biochemical or physiological differences
Question: What does morphovar classify?
Answer:
Morphological differences
Question:
Answer:
Question: What does pathovar classify?
Answer:
Disease-causing ability in different hosts
Question: What does serovar classify?
Answer:
Antigenic (surface antigen) differences.
Question: What are cellular microbes?
Answers Latest Update
Question: What is phagocytosis?
Answer:
cell eating
Question: What is chemoattractant?
Answer:
A chemical byproduct produced by a cell (e.g., a bacterium) that attracts a different cell
(e.g., a white blood cell).
Question: What is Brownian Motion?
Answer:
random movement of particles
Question: A neutrophil is the _______ to bacterial infections?
Answer:
The first responders
Question: True or false: Humans have a nucleus in RBC and neutrophils dont
Answer:
False
Question: Steps of neutrophil response to bacterial infections?
Answer:
1. Bacteria releases chemoattractant(scent trail)
2. Neutrophil surface receptors detect trai;
3. Neutrophil rearranges to have a back and a front
4. Neutrophil crawls towards bacteria
5. Neutrophil expands cell membrane
6. neutrophil swalos th bacteria and destroys it.
Question: Why are neutrophils called the first responders?
Answer:
The are the most abundant WBC therefore they are often the ones to encounter these
bacteria.
Question: What are the two parts of binomial nomenclature?
, Answer:
Genus and Species
Question: How is the scientific name written when types vs handwritten?
Answer:
Typed is ITALICIZED
Writtend is UNDERLINES
Question: Why is binomial nomenclature important?
Answer:
everyone around the world uses the same name for an organism which makes
communication easier
Question: Who performed the bacterial transformation experiment?
Answer:
Frederick Griffith
Question: What organisms did Griffith study?
Answer:
Streptococcus pneumoniae
Question: What does the S strain stand for?
Answer:
Smooth
Question: Why is the S strain smooth?
Answer:
It has a polysaccaride capsule.
Question: Is the S strain virulent or non virulent?
Answer:
Virulent, killed mouse
Question: What does R strain stand for?
Answer:
Rough
, Question: Does the R strain have a capsule?
Answer:
No
Question: Is the R strain virulent?
Answer:
No
Question: What is bacterial transformation?
Answer:
Uptake of genetic material that changes baceriums characeristics.
Question: Why did the mouse die after recieving live R cells and heat-killed S cells?
Answer:
DNA from the dead S cellls transformed the R cells into virulent S cells.
Question: What does biovar classify?
Answer:
Biochemical or physiological differences
Question: What does morphovar classify?
Answer:
Morphological differences
Question:
Answer:
Question: What does pathovar classify?
Answer:
Disease-causing ability in different hosts
Question: What does serovar classify?
Answer:
Antigenic (surface antigen) differences.
Question: What are cellular microbes?
