Kerala PSC Previous Years Question Paper & Answer

Title : Microbiologist - Food Safety (Govt. Analytical Laboratory)
Question Code : A


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.

page: 3 out of 16
Excerpt of Question Code: 27/2022

. Whi

. Whi


ich of the following staining procedure is employed for DNA ?
Feulgen staining B) Negative staining
2160 Neelsen staining D) Sudan black B staining

ich of the following inclusion body/bodies are present in Cyanobacteria ?
Cyanophycin granules


Poly metaphosphate

Poly B hydroxy butyrate
i and ii B) ii and iii
Only iii D) Only iv

. The following statements are characteristic of metabolic plasmids.
i. They carry genes for enzymes that degrade aromatic substances.
ii. They carry genes required for Rhizobium to induce legume nodulation.
iii. They contain genes that codes for an enterotoxin.
iv. They contain genes coding for antibiotic resistance.


i and ii B) ii and iii
Only iii D) ॥ and iv

. Pick out the false statement/statements against peptidoglycan of bacteria.
i. The presence of D amino acids protects against degradation by most peptidases.


~ Whi



-alanine, D-glutamic acid and mesodiaminopimelic acid, present only in bacterial
eptidoglycan are not found in other proteins.

iii. Many bacteria replace mesodiaminopimelic acid with L-lysine.

| bacteria possess the peptide interbridge.
i and ii B) ii and iii
Only iv D) Only ii

ich of the following statements is/are not true regarding halophiles ?

. Halophiles grow optimally in the presence of NaCl or other salts at a concentration

above 0.2 M.

ii. Halophilic prokaryotes accumulate enormous quantities of potassium in order to

remain hypertonic to their environment.

iii. The plasma membrane and cell wall of Halobacterium are stabilized by low

concentrations of sodium ion.

iv. Enzymes, ribosomes and transport proteins requires high potassium levels for

stability and activity.
i, ॥ and iii B) ii and iii
Only iv 0) Only i


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