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: 10 out of 16
Excerpt of Question Code: 27/2022











Which of the following statement about fructose is true ?

A) Most predominant conformation of fructose in solution is 8 - fructopyranose
B) In polysaccharides, fructose is seen in their furanose form

C) Fructose is hygroscopic

D) All of the above

The linking number of DNA

A) 15 a topological property

B) Determines the degree of supercoiling
C) Is the sum of Twist (Tw) and Writhe (Wr)
D) All the above

The Klenow fragment of DNA polymerase | has
A) 5’- 3' exonuclease activity 8) 3’- 5’ exonuclease activity
C) Very high processivity D) Helicase activity

The role of 670 (sigma-70) in prokaryotic transcription is
A) Binding DNA template

B) Binding regulatory sequences

C) Forming phosphodiester bonds

D) Recognizing the promoter and initiating RNA synthesis

Eukaryotic RNA polymerase || transcribes
A) 18s rRNA B) tRNA C) mRNA D) 5s rRNA

Which of the following statement is incorrect regarding splicing ?

A) Splicing is accomplished by two transesterification reactions

B) At the end of splicing, the intron is released in the form of a lariant

©) The 2’ ~ OH of the adenine at the branch site attacks the 3’ - splice site
0) snRNAs in spliceosome catalyze the splicing of mRNA precursors

Lac repressor protein in the absence of inducer binds to the operator and thereby
A) Activates transcription B) Blocks transcription
C) Attenuates transcription D) None of the above

The phenomenon by which some t-RNA molecules recognize more than one codon 18
because of
A) Watson-Crick base pairing B) Wobble base pairing

C) Hoogsteen base pairing D) Purine-purine base pairing

Shine-Dalgarno sequence is

A) Centered about 10 nucleotides on the 5’ side of the initiator codon
B) A part of prokaryotic m-RNA

C) A purine rich region

D) All the above


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