Microbiology Exam Prep V3
Microbiology ese prep v3
- 1.Which of the following is not true about spikes?
- A.
They are used for absorption
- B.
They are used for penetration
- C.
They may cause haemagglutination
- D.
They are only found on enveloped viruses
- 2.The ability of a virus to infect an organism is regulated by
- A.
The host species
- B.
The type of cells
- C.
The availability of an attachment site
- D.
Cell factors necessary for replication
- E.
All of the above
- 3.Which of the following statements is not true?
- A.
Viruses contain DNA or RNA
- B.
The nucleic acid of a virus is surrounded by a protein coat
- C.
Viruses multiply inside living cells using viral mRNA, tRNA and ribosomes
- D.
Viruses cause the synthesis of specialised infectious elements
- E.
Viruses multiply inside living cells
- 4.A viroid is
- A.
A complete infectious virus particle
- B.
A naked infectious piece of RNA
- C.
A capsid without any nucleic acid
- 5.An enveloped virus acquires its envelope during _____________
- A.
Penetration
- B.
Adsoprtion
- C.
Uncoating
- D.
Release
- 6.The most conclusive evidence that viruses cause cancers is provided by
- A.
Finding oncogenes in viruses
- B.
The presence of antibodies against viruses in cancer patients
- C.
Cancer following the injection of cell-free filtrates
- D.
Treating cancer with antibodies
- E.
Some liver cancer patients having had hepatitis
- 7.Generally, in a DNA-virus infection, the host animal cell supplies all of the following except
- A.
RNA polymerase
- B.
Nucleotides
- C.
DNA polymerase
- D.
TRNA
- E.
None of the above
- 8.Which of the following is most useful in determining whether two organisms are related?
- A.
If both ferment lactose
- B.
If both are gram-positive
- C.
If both are motile
- D.
If both are aerobic
- E.
All are equally important
- 9.Into which group would you place a photosynthetic cell that lacks a nucleus?
- A.
Animalia
- B.
Bacteria
- C.
Fungi
- D.
Plantae
- 10.Which of the following is a characteristic of Clostridium?
- A.
Endospore-forming cocci
- B.
Mycobacteria
- C.
Gram-negative aerobic cocci
- D.
Anaerobic gram-negative rods
- E.
None of the above
- 11.Which of the following do you expect to be most resistant to high temperatures?
- A.
Bacillus subtilis
- B.
Eschericia coli
- C.
Neisseria gonorrhoeae
- D.
Staphylococcus aureus
- E.
Streptococcus pyogenes
- 12.Which of the following lacks a cell wall?
- A.
Eschericia
- B.
Mycoplasma
- C.
Mycobacterium
- D.
Clostridium
- E.
Streptococcus
- 13.Rickettsias differ from chlamydias in that rickettsias
- A.
Are gram-negative
- B.
Are intracellular parasites
- C.
Require an arthropod for transmission
- D.
All of the above
- E.
None of the above
- 14.Chemotaxis implies that bacteria:
- A.
Move towards an attractant
- B.
Move away from a repellant
- C.
Both a and b
- D.
Neither a nor b
- 15.The best definition of HUMORAL immunity is:
- A.
Immunity involving soluble antibodies
- B.
Immunity involving STEM CELLS
- C.
Immunity involving the lymphatics system
- D.
Immunity involving T cells
- E.
Immunity involving platelets
- 16.The most common type of antibody in the serum is:
- A.
IgG
- B.
IgE
- C.
IgM
- D.
IgA
- E.
IgD
- 17.Each antibody has THREE binding sites, one at the end of each arm of the "Y"
- A.
True
- B.
False
- 18.Each antigen-binding site of an antibody molecule is composed of:
- A.
The Fc domain
- B.
The light chains
- C.
The variable domains of one light and one heavy chain
- D.
The constant domains of one light and one heavy chain
- E.
The variable domains of two light chains
- 19.Antigenic peptides that are presented by antigen presenting cells are called:
- A.
Fc fragments
- B.
Secretory fragments
- C.
Epitopes
- D.
Antibodies
- 20.An important characteristic of IgA is:
- A.
It is found in secretions
- B.
It can cross the placenta
- C.
It is the first Ab secreted in response to antigen stimulation
- D.
All of the above
- 21.The secondary immune resonse
- A.
Display a more rapid onset than primary responses
- B.
Reach higher maximum levels than primary responses
- C.
Display a more acute rise (steeper slope) in immune activity over time than primary resonses
- D.
Will often prevent disease
- E.
All of the above
- 22.Opsonisation
- A.
Is mediated by the interaction of antibodies with the Fc receptors on phagocytes
- B.
Results in more efficient ingestion of antigen by phagocytes
- C.
Is important in resisting and/or fighting many bacterial infections
- D.
Is particularly well-mediated by several of IgG
- E.
All of the above
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