MDS PREP
What is the effect of Actinomycin D on orthomyxoviruses?
1) Stimulates multiplication
2) Inhibits multiplication
3) No effect
4) Enhances stability
General Microbiology Answer: 2Actinomycin D is an antibiotic that inhibits RNA synthesis. In the case of orthomyxoviruses, it effectively inhibits their multiplication by preventing the transcription of viral RNA, thereby blocking the virus ability to replicate. Actinomycin D inhibits the multiplication of orthomyxoviruses by blocking RNA synthesis, which is crucial for viral replication.
What disease is associated with inhalation of dust from infected wool?
1) Cutaneous anthrax
2) Pulmonary anthrax
3) Gastrointestinal anthrax
4) None of the above
Pulmonary anthrax is associated with inhalation of dust from infected wool.
What is the primary reservoir for S. typhi?
1) Domestic animals
2) Insects
3) Water and food
4) Human carriers
General Microbiology Answer: 4The primary reservoir for S. typhi is Human carriers: Typhoid fever is primarily a human disease with human carriers serving as the main reservoir for the bacterium. While the bacteria can also be found in water and food, it is typically humans who carry and transmit the infection.
The bacterial population in the gingival sulcus or the pocket that influences the course of periodontal disease has been found to involve
1 bacteria indigenous to the oral cavity
2. essentially a pure culture
3. essentially the same organisms found in the healthy sulcus
4. mostly aerobic bacteria
Microbiology
Answer: 3
The bacterial population in the gingival sulcus or the pocket that influences the course of periodontal disease has essentially the same organisms found in the healthy sulcus
What is the primary reservoir for prions?
1) Bacteria
2) Viruses
3) Proteinaceous particles
4) Nucleic acids
General Microbiology Answer: 3Prions are infectious agents composed solely of protein. They do not have nucleic acids like DNA or RNA and are responsible for several neurodegenerative diseases. The primary reservoir for prions is thus the proteinaceous particles themselves.
The minimum and maximum temperature for normal metabolic
activity microorganisms that live on or within the human body is
1 50 C
to 300 C
2 200 C to 450
C
3. 300 C to 400
C
4. 15 C to 600
C
Microbiology Answer: 2
The minimum and maximum temperature for normal metabolic activity microorganisms that live on or within the human body is 20° C to 45°C
Which of the following is NOT a type of C1. Perfringens that can cause food poisoning?
1) C1. Perfringens type A
2) C1. Perfringens type B
3) C1. Perfringens type C
4) C1. Perfringens type D
General Microbiology Answer: 4
C1. Perfringens types A, B, and C are capable of producing toxins that cause food poisoning. Type D, however, is not associated with foodborne illness. It is primarily involved in diseases such as gas gangrene and other infections due to the production of different types of toxins.
What is the typical color of Salmonella colonies on MacConkey agar, except for Sh. Sonnei?
1) Colorless
2) Pink
3) Red
4) Yellow
General Microbiology Answer: 1Salmonella species, excluding Shigella sonnei, which is lactose non-fermenting, will ferment lactose in MacConkey agar, turning the colonies pink due to the formation of acidic end-products