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NEET MDS Quiz - Practice Test

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General Microbiology - 3 Questions

1
General Microbiology

What is the typical color of Salmonella colonies on MacConkey agar, except for Sh. Sonnei?

1) Colorless

2) Pink

3) Red

4) Yellow

📝 Explanation:

Salmonella 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

2
General Microbiology

Which of the following is a feature of HLA class I antigens?
1) Found on red blood cells
2) Involved in humoral immunity
3) Present on all nucleated cells
4) Only present in lymphocytes

📝 Explanation:

HLA class I antigens are present on all nucleated cells, playing a crucial role in the immune response.

3
General Microbiology

Which test uses live Treponema pallidum as the antigen?

1) TPA test

2) TPI test

3) FTA test

4) TPHA test

📝 Explanation:

TPI test: The Treponema pallidum immobilization (TPI) test involves using live T. pallidum as an antigen to detect antibodies in the patient's blood serum.

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