Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Microbiologist - Food Safety (Govt. Analytical Laboratory) ' And exam conducted in the year 2022. And Question paper code was '27/2022'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.
The following statement is/are not true regarding superantigen like Staphylococcus
i. They activate a large number of T cells irrespective of their antigen specificity.
They bind outside the antibody binding groove directly to the lateral aspect of TCR
iii. They bind to the of heterodimer groove of the MHC molecules through the
V regions of TCR © and 8 chains.
They are highly resistant to proteases and denaturation by CD4+T cells.
A) iandii 8) iii and iv C) Only iii D) Only iv
Complementarity Determining Regions (CDRs) are present in the
A) Fc fragment of antibody B) Fab fragment of antibody
C) Hinge region of antibody 0) C441 and C, domains
Which of the following statement/statements is/are characteristic of secretory IgA (SIgA) ?
i. Secretory piece present in SIgA is not produced by lymphoid cells.
ii. Secretory piece is believed to protect SIgA from denaturation by bacterial proteases.
iii. SIgA (MW about 4,00,000) is a smaller molecule than serum IgA.
iv. IgA fixes complement.
A) iandii 8) iiand iii C) iiiand iv D) Only iii
The following is an/are example/examples of heterophile agglutination tests.
i. Weil-Felix test
ர். Paul-Bunnel test
ii. Streptococcus MG agglutination test
iv. Widal test
A) i, ii 8) i, ii, iii ©) On iii D) i, iii, iv
Complement participates in
i. Type | hypersensitivity reaction
ii. Type Il hypersensitivity reaction
iii. Type Ill hypersensitivity reaction
iv. Type IV hypersensitivity reaction
A) iandii 8) iiand iii C) Onlyi D) ॥ and iv
Which HLA Class molecule/molecules is/are responsible for the graft-versus-host
A) HLA Class | 8) HLA Class ||
©) HLA Class III D) HLA Class | and Class III
Which of the following acts as an adjuvant in DPT vaccine ?
A) Freund's incomplete adjuvant B) Freund’s complete adjuvant
C) Bordetella pertussis D) Aluminium hydroxide