Medical Archives

721. Cleavage of IgG molecule by Papin gives rise to:One Fc fragment and two Fab fragments_______________?

A. One Fc fragment and two Fab fragments

B. One Fc fragment and four Fab fragments

C. Two Fc fragments and two Fab fragments

D. Two Fc fragment and one Fab fragment

✅ The correct answer is option One Fc fragment and two Fab fragments.

722. Viruses can be isolated from clinical samples by cultivation in the following except_______________?

A. Tissue culture

B. Embryonated eggs

C. Animals

D. Chemically defined media

✅ The correct answer is option Chemically defined media.

723. About Psedomonas. All are true except________________?

A. Strick aerobes

B. Can grow in disinfectants in hospital

C. Infection is mostly due to endogenous source

D. Most common organism is burn patient

✅ The correct answer is option Infection is mostly due to endogenous source.

724. Viron is defined as______________?

A. Extracellular infectious virus particle

B. Smallest virus

C. A smallest particle similar to virus

D. None of the above

✅ The correct answer is option Extracellular infectious virus particle.

725. Actinomycosis is caused by______________?

A. Fungus

B. Acid fast, non-motile bacillus

C. Anaerobic, gram positive, non-acid fast bacteria.

D. Retrovirus

✅ The correct answer is option Anaerobic, gram positive, non-acid fast bacteri.

726. Which of the following is NOT a live attenuated vaccine ?

A. Tuberculosis (BCG)

B. Typhoid

C. Varicella Zoster virus

D. Cholera

✅ The correct answer is option Cholera.

727. A darkfield microscope would be useful in examining blood for_______________?

A. Treponema

B. Actinomyces

C. Streptococcus

D. Mycobacterium

✅ The correct answer is option Treponema.

728. Interferon interferes with replication of virus at the time of_____________?

A. Protein synthesis

B. DNA/RNA replication

C. When virus enters the cell

D. Uncoating of the virus proteins capsule

✅ The correct answer is option Protein synthesis.

729. True about HIV are all except______________?

A. DNA virus

B. Attacks CD4 cells

C. Macrophages are the reservoir

D. Decrease CD4 count in late stages

✅ The correct answer is option DNA virus.

730. For uniform staining reaction, morphology and biochemical activity it is advisable to study bacterial cultures during the_____________?

A. Lag phase

B. Death phase

C. Stationary phase

D. Logarithmic phase

✅ The correct answer is option Logarithmic phase.