Kerala PSC Previous Years Question Paper & Answer

Title : ASSISTANT RESEARCH OFFICER CHEMISTRY
Question Code : A

Page:11


Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'ASSISTANT RESEARCH OFFICER CHEMISTRY' And exam conducted in the year 2018. And Question paper code was '068/2018/OL'. 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: 11 out of 12
Excerpt of Question Code: 068/2018/OL

Question90:-Glycoproteins
A:-contain oligosaccharides linked to the side chain of lysine or histidine residues
B:-contain oligosaccharides linked to the side chain of asparagine, serine, or threonine residues
C:-bind to liver cell-surface receptors that recognize sialic acid residues
D:-are mostly cytoplasmic proteins
Correct Answer:- Option-B
Question91:-Which of the following is an example of a restriction site that shows two-fold rotational symmetry?
A:-ATTA
B:-ATAATA
C:-ATAT
D:-ATTTTA
Correct Answer:- Option-C

Question92:-A deficiency in which of the following amino acids will result in the negative nitrogen balance, even though the
diet may contain a large amount of protein

A:-Alanine

B:-Serine

C:-Glutamate
D:-Tryptophan

Correct Answer:- Option-D

Question93:-Which of the following binding interactions is likely to be the most important initial interaction when a drug
enters a binding site?

A:-Van der Waals interactions
-Hydrogen bond
C:-lonic
D:-Induced dipole-dipole interactions
Correct Answer:- Option-C
Question94:-During photosynthesis, which of the followings acts as a reservoir for hydrogen ions?
A:-Cristae
Stroma
C:-Thylakoid space
D:-Matrix
Correct Answer:- Option-C
Question95:-Maple syrup urine disease is a deficiency of which amino acid degradative pathway?
A:-Tyrosine
-Leucine
C:-Tryptophan
D:-Arginine
Correct Answer:- Option-B
Question96:-The light microscope that is often used to view internal structures of living cells without staining is
A:-Dark-field microscope
B:-Bright-field microscope
C:-Fluorescence microscope
D:-Phase-contrast microscope
Correct Answer:- Option-D

Question97:-You wish to prepare a 10 UM solution of a protein of molecular weight 10,000. Which of the following statement
is most incorrect?

A:-Weigh out 10 mg and dissolve it in 100 ml of solution
B:-Weigh out 0.1 g and dissolve it in 1 litre of solution
C:-Weigh out mg and dissolve it in 5 ml solution, then dilute this solution tenfold
D:-Weigh out 0.02 g and dissolve it in 20 ml of solution, then dilute this solution 2 fold
Correct Answer:-Question Cancelled
Question98:-Which of the following medium is used to select the heterokaryon hybridoma cell in hybridoma technology?
A:-Hydroxy urea, aminopterine, thymidine
B:-Hypoxanthine, acetaminophen, thymidine
C:-Hypoxanthine, aminopterine, thiourea
D:-Hypoxanthine, aminopterine, thymidine
Correct Answer:- Option-D
Question99:-An example of inactivated exotoxin
A:-Cholera vaccine
B:-Rabies vaccine

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