Infection & Immunity - Mock Quiz 1
Mock quiz for I&I on Monday! Good luck =) This is only over the first lecture, I have not yet gone over the other ones.
- 1.Which of the following is NOT considered a typical component of the 3 domains?
- A.
Eucarya
- B.
Archaea
- C.
Bacteria
- D.
Animalia
- 2.While out on a field research experiment with your colleagues, you discover a brand new microorganism. Being the astute student that you are, you recognize that the microorganism is a prokaryote due to the presence of which of the following structures?
- A.
Ribosomes
- B.
Nucleus
- C.
Mitochondria
- D.
Golgi Apparatus
- 3.Not only did you discover a brand new microorganism, you decided to classify it under a taxonomic division as well (what a stellar student you are!). From your knowledge of prokaryotes, you decide to classify this microorganism as a bacteria because of their classic morphological shapes which are easily identified in the lab.Which of the following morphologies is NOT typically seen in bacteria?
- A.
Rods
- B.
Helix
- C.
Cocci
- D.
Spirillum
- 4.One of your close colleagues decides to contest your classification of the previously mentioned microorganism. He claims that what you have discovered is actually a type of Archaea instead of your proposed Bacterium.You can assure your colleague of your confidence that the microorganism at hand is indeed a Bacterium due to the presence of which of the following which is found only in Bacteria?
- A.
Absence of membrane bound organelles
- B.
Spherical shape
- C.
Nucleoid region
- D.
Peptidoglycan cell wall
- 5.Amoeba, which are single celled organisms that belong to the genus protozoa, belong in which of the following domains?
- A.
Eukarya
- B.
Bacteria
- C.
Archaea
- 6.True or False. Viruses are considered obligate intracellular parasites.
- A.
True
- B.
False
- 7.What is the main difference between a prion and a virus?
- A.
Viruses are considered infectious agents, prions are not
- B.
Prions are responsible for more severe diseases such as Mad Cow
- C.
Viruses do not contain protein, whereas prions are all protein
- D.
Prions lack nucleic acid
- 8.Bacterial ribosomes consist of a 30S subunit and a 50S subunit. Given the above information, what is the svedberg (sedimentation unit) of a bacterial ribosome?
- A.
60S
- B.
70S
- C.
80S
- 9.The electron transport chain and consequently the metabolic processes of respiration are located where in a prokaryote?
- A.
On the cytoplasmic membrane
- B.
On the mitochondrial membrane
- C.
Within the cytoplasm
- 10.*This might be a tricky question if you didn't catch it in lecture, but if you think it through for a bit the answer might be more apparent.* The gram stain is a procedure that allows researchers to differentiate between gram(+) and gram(-) prokaryotes. Which of the steps in the gram stain is absolutely critical in being able to differentiate between the two types of prokaryotes?
- A.
Step 1 - Crystal Violet
- B.
Step 2 - Iodine
- C.
Step 3 - Alcohol
- D.
Step 4 - Satranin
- 11.Differentiating between gram (+) and gram (-) bacteria is important due to their morphological differences and the the ability of drugs to target these differences.Which of the following accurately describes these differences between gram (+) and gram (-) cell walls?
- A.
Gram (+) have two, thick peptidoglycan cell walls
- B.
Gram (-) have two, lipid bilayer cell walls
- C.
Gram (-) have two, thin peptidoglycan cell walls
- D.
Gram (+) have two, lipid bilayer cell walls
- 12.For gram (-) prokaryotes, the electron transport chain responsible for respiration is located where?
- A.
Outer lipid bilayer
- B.
Peptidoglycan layer
- C.
Inner lipid bilayer
- D.
Cytoplasm
- E.
Mitochondrial membrane
- 13.A gel-like layer that allows the adherence of other microorganisms onto it to form a community is known as which of the following?
- A.
Glycocalyx
- B.
Capsule
- C.
Slime
- D.
Biofilm
- 14.Teichoic acid and lipopolysaccharides (LPS) are important components of bacterial cell walls. Which of the following statements is true regarding Teichoic acid and LPS?
- A.
Teichoic acid is found only on gram (-) cell walls
- B.
Teichoic acid is also known as an endotoxin
- C.
LPS is a component of gram (+) cell walls
- D.
LPS is also known as an endotoxin
- 15.Between Teichoic acid and LPS, which of the two can produce a condition known as Disseminated intravascular coagulation (DIC)?
- A.
Teichoic Acid
- B.
Lipopolysaccharides
- 16.Your friend is suffering from a severe stomach ache after drinking some unidentified fluid that he found laying around in lecture hall 1. He is confused by the presence of this illness because he claims that he boiled the water for a prolonged period of time and that it should have wiped out any microorganisms in the liquid. With your knowledge of microorganisms and their defensive tactics, which of the following would you expect to find in the liquid that he drank, which would explain your friend's sickness?
- A.
A thick layer of protective glycocalyx
- B.
Well defined fimbriae
- C.
The presence of a biofilm
- D.
Endospores
- 17.One last first order question that you might have missed if you glanced over the notes quickly :pWhich of the following is NOT considered a part of a flagella, which is a long protein structure used for motility in bacteria?
- A.
Filament
- B.
Hook
- C.
Pillus
- D.
Basal Body
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