Question

mcq of 308 virology microbiology ​

Answer 1

Answer:

Explanation:

Part 1 Examination in Medical Microbiology and Virology

Sample MCQs

Multiple Choice Questions

Question 1

The cell wall of gram-positive bacteria may contribute to the development of septic shock. Identify the component which is most associated with the induction of septic shock.

A Capsular protein

B Endotoxin

C Peptidoglycan

D Phospholipid

E Teichoic acid

Question 2

Genetic variation in viruses contributes to their ability to evade the immuneresponse.

Select the principal means by which antigenic shift occurs in influenza A virus.

A Low fidelity of DNA dependent DNA polymerase

B Low fidelity of RNA dependent RNA polymerase

C Low fidelity of reverse transcriptase

D Reassortment of fragments of the RNA genome

E Recombination between RNA genomes

Question 3

A 34 year old man with diabetic ketoacidosis develops headache, nasal congestion, periorbital swelling and a bloodstained nasal discharge. Over a period of a week he become drowsy and unresponsive. ENT examination shows black, necrotic lesions on the nasal septum, which is perforated. A lumbar puncture is performed but the CSF findings are entirely normal. Culture of the nasal discharge shows a heavy growth of Streptococcus pneumoniae and Staphylococcus aureus.

Select the most likely diagnosis.

A Dental abscess

B Nasal diphtheria

C Orbital cellulitis

D Rhinocerebral mucormycosis

E Severe maxillary sinusitis

Question 4

The aminoglycosides are a very active group of antibacterial agents, particularly against Gram-negative bacilli.

Identify their mode of action from the list.

A Disruption of cytoplasmic membrane function

B Inhibition of bacterial cell wall synthesis

C Inhibition of bacterial DNA gyrase

D Inhibition of protein synthesis

E Interference with bacterial folic acid metabolism