EASY PSC | 007/2022 - Laboratory Technician Gr II Answer Key Published

Question 1

In a case of Acute Lymphoblastic Leukemia, the lymphoblasts demonstrated strong localized positivity with acid phosphatase.
The cells were positive for CD2 and CD7 and negative for CD19, CD24, and CD20.
These blasts are most likely :

A

Lymphoid stem cells

B

T lymphoblasts

C

B lymphoblasts

D

Undifferentiated blasts

Question 2

A patient with anemia of chronic disease is most likely to have which set of laboratory test results ?

A

MCV decreased, serum iron decreased, serum ferritin decreased, TIBC and % saturation decreased

B

MCV normal, serum iron increased, serum ferritin decreased, TIBC and % saturation decreased

C

MCV normal, serum iron decreased, serum ferritin increased, TIBC and % saturation decreased

D

MCV decreased, serum iron increased, serum ferritin increased, TIBC and % saturation increased

Question 3

An increase in the reticulocyte count is accompanied by :

A

Suppressed maturation of normoblasts in the bone marrow

B

A shift to the left in the oxygen dissociation curve

C

Polychromasia on the Romanovsky stained blood smear

D

An increase in direct serum bilirubin

Question 4

A 8-year-old boy presents with intramuscular hematomas and recurrent hemarthroses. Laboratory tests reveal normal platelet count bleeding time, and PT, but the PTT is prolonged. This condition most likely results from an abnormality involving :

A

Chromosome 8

B

Chromosome 14

C

Chromosome 21

D

X Chromosome

Question 5

A patient is suspected of having hemolytic anemia. Numerous spherocytes are present in the blood smear, and the reticulocyte count is 18%. What test should be done to determine whether this is an autoimmune process ?

A

Direct Antiglobulin Test (DAT)

B

Osmotic Fragility Test

C

Urinalysis

D

Serum Bilirubin

Question 6

A joint aspiration is performed on a 60 year old lady with painful swollen elbow, and a sample is sent to the laboratory. A cytocentrifuged slide is examined with polarized light shows needlelike intracellular and extracellular crystals which exhibit negative birefringence compensator. These crystals would be best identified as which of the following ?

A

Calcium pyrophosphate

B

Cholesterol

C

Monosodium urate

D

Steroids

Question 7

A thoracentesis is performed on a large pleural effusion yielded 1.2 L of thick, yellow fluid. Laboratory studies show a total protein of 4.5 g/dL (serum=6 g/dL) lactate dehydrogenase 40 U/L (serum = 50 u/L) and total leukocyte count of 20,000/microlitre with 90% segmented neutrophils. Which statement fits most well for this fluid ?

A

This is an exudate

B

This is a transudate

C

This is a chylous fluid

D

This is unlikely to be of an infectious etiology

Question 8

Hematuria with dysmorphic RBCs is a hallmark of :

A

Renal Tuberculosis

B

Acute Glomerulonephritis

C

Chronic Renal Failure

D

Renal Calculi

Question 9

Microalbuminuria is defined as level of albumin in urine at range of :

A

100-150 mg/day

B

150-200 mg/day

C

30-300 mg/day

D

300-600 mg/day

Question 10

A 51-year-old man is admitted following an episode of hematemesis in which he remembers vomiting about a liter of dark red bloody vomitus into the. He is found to have orthostatic hypotension. His Hgb is 6.2 g/dL, Hct 18.8%, MCV 74 fL, platelet count 90,000/uL, and WBC count 10,100/uL. His prothrombin time is 12.1 seconds and partial thromboplastin time 26.2 seconds. Which of the following blood products is most appropriate for this man ?

A

Whole blood

B

Cryoprecipitate

C

Fresh frozen plasma

D

Packed RBC"s

Question 11

A recipient developed a sudden drop in blood pressure following transfusion, though he remained afebrile. Which of the following conditions is most likely to be found ?

A

Septicemia

B

Graft-versus-host disease

C

Penicillin allergy

D

IgA deficiency

Question 12

One unit of FRESH FROZEN PLASMA prepared from whole blood contains __________ ml of plasma.

A

100-150

B

250-400

C

200-250

D

50-150

Question 13

Coombs control cell consists of :

A

Type O positive cells coated with Anti D

B

Type O negative cells coated with Anti D

C

Type A positive cells coated with Anti D

D

Type A negative cells coated with Anti D

Question 14

Nucleic acid Amplification Test for HIV was instituted in donor testing protocols to :

A

Identify donors with late stage HIV who lack antibodies

B

Confirm the presence of anti HIV in asymptomatic HIV INFECTED DONORS

C

Reduce window period to detect virus earlier than other available tests

D

Detect antibodies to specific viral proteins including p24

Question 15

Gauge of needle ideal for blood transfusion generally is :

A

21 G

B

25 G

C

16 G

D

10 G

Question 16

Which of the following is an example of Iron Hematoxylin ?

A

Mayers Hematoxylin

B

Harris"s Hematoxylin

C

Weigerts Hematoxylin

D

Gills Hematoxylin

Question 17

Which of the following microtome is better for cutting large specimens for museum ?

A

Rotary microtome

B

Rocking microtome

C

Sledge microtome

D

Sliding microtome

Question 18

Which of the following is a routinely used clearing agent in histopathology ?

A

Chloroform

B

Xylene

C

Benzene

D

Cedarwood oil

Question 19

Which of the following is not a slide adhesive ?

A

DPX

B

Mayer"s egg albumin

C

Chrome alum-gelatin

D

APES

Question 20

Which of the following is not an aqueous mounting media ?

A

Glycerine jelly

B

Apathy"s media

C

Fructose syrup

D

Canada balsam

Question 21

Which among the following is the best stain for demonstration of Barr Body ?

A

Papanicolaou stain

B

Orcein stain

C

Hematoxylin & Eosin stain

D

Shorr stain

Question 22

Which of the following EA (Eosin Azure) is preferred for non-gynaecological smears ?

A

EA 50

B

EA 36

C

EA 65

D

EA 25

Question 23

Which of the following fixative is not useful in a Millipore Filter (membrane filter) ?

A

95% Ethyl alcohol

B

80% Isopropyl alcohol

C

100% Methanol

D

80% Propanol

Question 24

Which among the following is the most suitable fixative for gastric washings ?

A

50% Ethanol

B

70% Ethanol

C

95% Ethanol

D

None of the above

Question 25

Carnoy"s fixative do not contain __________.

A

95% Ethanol

B

Glacial acetic acid

C

Chloroform

D

Formaldehyde

Question 26

Tissue of choice for routine karyotyping :

A

Blood

B

Bone marrow

C

Skin

D

Amniotic fluid

Question 27

Anticoagulant of choice for chromosome analysis like Karyotyping :

A

EDTA

B

Heparin

C

Sodium Citrate

D

None of the above

Question 28

Which type of chromosome abnormality is characteristically seen in Philadelphia chromosome ?

A

Inversion

B

Deletion

C

Translocation

D

None of the above

Question 29

Which is the standard/Routine banding technique used in chromosome studies ?

A

C-Banding

B

R-Banding

C

Q-Banding

D

G-Banding

Question 30

Which of the following techniques can be used in diagnosing haematological malignancy ?

A

Flow cytometry

B

Karyotypic analysis

C

PCR-based assays

D

All the above

Question 31

Sterilisation techniques are first developed by :

A

Paul Ehrlich

B

Edward Jennar

C

Robert Koch

D

Louis Pasteur

Question 32

The microscope which is used to visualize organisms which are live and unstained :

A

Light microscope

B

Dark field microscope

C

Fluorescent microscope

D

Scanning electron microscope

Question 33

Holding period of Laboratory Autoclave :

A

160° for 1 hour

B

100° for 20 minutes

C

121° for 15 minutes, 15 lbs

D

85° for 30 minutes

Question 34

Which of the following statement is false about receiving clinical specimens in laboratory ?

A

Laboratory staff should be in gown and glove

B

Laboratory staff should check whether samples are received in leak proof container

C

Unlabelled specimens and wrongly labelled specimens can be accepted

D

If sample is not sufficient for processing, the staff can ask for a repeat sample

Question 35

Which statement is false regarding ionising radiation ?

A

It has got a low penetrating power

B

It is termed as cold sterilisation

C

X-rays and gamma rays are lethal to DNAs

D

Used for sterilising plastic items, syringes and catheters

Question 36

All of the following tests are used for detecting efficacy of disinfectants except :

A

Chick Martin test

B

In-use test

C

Kelsey-sykes test

D

Serenys test

Question 37

Isospora belong to which Sub-phylum ?

A

Sub-phylum Sporozoa

B

Sub-phylum Microspora

C

Sub-phylum Ciliophora

D

Sub-phylum Sarcomastigophora

Question 38

All the following helminthic eggs are not bile stained except :

A

Ancylostoma duodenale

B

Enterobious vermicularis

C

Ascaris lumbricoides

D

Necator americanus

Question 39

NIH swabs are used for collecting specimens in suspected cases of :

A

Trichuriasis

B

Ancylostomiasis

C

Ascariasis

D

Enterobiasis

Question 40

Cryptosporidia oocysts are better stained and visualized by :

A

Leishman stain

B

Modified acid fast staining

C

Ponder"s stain

D

H and E stain

Question 41

Which of the following is included in the laboratory diagnosis of Filariasis ?

A

Demonstration of microfilaria in peripheral blood of patients

B

Serological methods

C

Imaging methods and molecular methods

D

All of the above

Question 42

The major complication of Falciparum malaria :

A

Black water fever

B

Cerebral malaria

C

Algid malaria

D

All of the above

Question 43

Which of the following statement about bacterial capsule is incorrect ?

A

Streptococcus pneumoniae has polysaccharide capsule

B

Protects bacteria by inhibiting phagocytosis

C

Can be demonstrated by negative staining in wet films by India ink method

D

Helps in bacterial motility

Question 44

Which is the surrogate marker for detection of methicillin resistance mediated by mec A gene in Staphylococcus Aureus by disc diffusion method ?

A

Cefpodoxime

B

Cefoxitin

C

Optochin

D

Bacitracin

Question 45

All are correct about autoclave except :

A

Used to sterilize surgical instruments in hospital

B

Sterilizing conditions commonly used are temperature exposure of 121°C for 15 min at 15 pounds pressure

C

Spores of Bacillus Atrophaeus is used as sterilization control

D

Gravity displacement type is commonly used in laboratories

Question 46

Which of the following is a selective medium for Salmonella Typhi ?

A

Xylose lysine deoxycholate agar

B

Alkaline bile salt agar

C

Mannitol salt agar

D

Thayer Martin medium

Question 47

Which is not correct regarding oxidase test ?

A

Used to identify bacteria which produce the enzyme cytochrome oxidase

B

The test is performed on bacterial colonies from MacConkey"s agar

C

Positive test is shown by purple color developing within 10 seconds

D

Reagent used is 1% tetra-methyl-p-phenylenediamine dihydrochloride

Question 48

Which of the following can be used to stain metachromatic granules of Corynebacterium diphtheriae ?

A

Albert"s stain

B

Neisser"s stain

C

Loeffler"s methylene blue

D

All of the above

Question 49

Which of the following cannot be cultivated in artificial culture media ?

A

Cryptococcus neoformans

B

Rhinosporidium seebri

C

Blastomyces dermatitidis

D

Sporothrix schenckii

Question 50

All are true about Sabouraud"s dextrose agar except :

A

pH of the medium is 8.6

B

Growth of saprophytic fungi is prevented by adding cycloheximide

C

Constituents are peptone, dextrose and agar

D

Used for the isolation of pathogenic and non-pathogenic fungi

Question 51

Which of the following is/are true of dimorphic fungi ?

A

Occurs as yeast form in tissues at 37°C

B

Occurs as mycelial form in cultures at 25°C

C

Sporothrix schenckii is a dimorphic fungus

D

All of the above

Question 52

Candida albicans shows the following characteristics except :

A

Is a true yeast

B

Demonstration of pseudohyphal forms in tissue indicates invasion

C

Rapid identification is by its ability to form germ tubes at 37°C in 2 hrs

D

Oral thrush is a form of mucosal candidiasis

Question 53

Which of the following fungi causing human disease is not a common laboratory contaminant ?

A

Penicillium spp

B

Cryptococcus spp

C

Aspergillus spp

D

Mucor spp

Question 54

Which of the following statement regarding dermatophytes is not correct ?

A

Are hyaline filamentous fungi

B

Infect keratinised tissues

C

Sensitive to cycloheximide

D

Infect skin, hair and nails

Question 55

An example of continuous cell line for virus isolation is :

A

Human carcinoma of cervix cell line

B

Human amnion cell culture

C

Human embryonic lung cell strain

D

Rhesus embryo cell strain

Question 56

In a patient with chronic hepatitis B virus infection which serological marker indicates high infectivity ?

A

Hepatitis B surface antigen

B

Hepatitis B (Precore) antigen

C

Hepatitis B surface antibody

D

Hepatitis B core antibody

Question 57

All of the following are true of viral inclusion bodies except :

A

They are aggregates of viruses inside an infected cell

B

They are situated only in the cytoplasm of infected cells

C

Giemsa stain is used to demonstrate inclusion bodies

D

Negri bodies are inclusion bodies seen in brain tissue in rabies virus infection

Question 58

Which of the following is not correct regarding biosafety cabinets ?

A

Biosafety cabinets are of 2 classes

B

They provide a barrier between the lab personnel and infective material during processing

C

Procedures like mixing or ultrasonic disruption of specimens of pathogens that generate aerosols is done in class I biosafety cabinet

D

Uninoculated cell cultures for virus isolation are processed in class II biosafety cabinet

Question 59

Which of the following statements regarding prions is incorrect ?

A

Infectious proteinaeceous agents which do not have nucleic acid

B

They can be inactivated by boiling at 100°C

C

Kuru is human disease caused by prions

D

Instruments contaminated with prion containing materials can be disinfected with 1N sodium hydroxide

Question 60

All of the following are true of NIPAH virus except :

A

Fruit bats of the Pteropodidae Family are its natural host

B

It is an enveloped RNA virus and belongs to Paramyxoviridae family

C

It is a Biosafety level 2 pathogen

D

Diagnosis in the early phase of infection is by real time PCR of throat specimens

Question 61

Among the following methods, identify the correct way of cleaning laboratory glassware.

A

Soap water --> Tap water --> Paper towel drying

B

Soap water --> Tap water --> Air drying

C

Soap water --> Tap water --> Acetone wash --> Air drying

D

Soap water --> Tap water --> Deionized water --> Air drying

Question 62

Identify the factor that is not a contributor in loss of pipetting accuracy.

A

Temperature of fluid to be pipetted.

B

Viscosity of fluid to be pipetted.

C

Fluid volume 50% above minimum volume.

D

Angle of pipette during aspiration.

Question 63

Out of the listed safety protocols, identify the protocol not adhering to proper laboratory safety standard.

A

Splash goggles should always be worn inside the laboratory.

B

Procedures resulting in hazardous fumes should be performed in a flume hood.

C

Material safety data sheet (MSDS) of all chemicals used must be displayed in the laboratory.

D

Used needles and blades should be safely disposed by wrapping in paper towels.

Question 64

In a chemical laboratory, identify the protocol not adhering to proper chemical storage standards.

A

Methanol should be stored in a flame safety cabinet.

B

Oxidizers and flammables should be stored in same cabinet for easy access.

C

Chemicals should not be stored purely based on alphabetic order.

D

Acids and bases should be stored separately or with sufficient distance.

Question 65

Highest purity of water is indicated by which conductivity ?

A

18.2 MΩ cm^-1

B

15.0 MΩ cm^-1

C

17.2 MΩ cm^-1

D

12 MΩ cm^-1

Question 66

Identify the SI unit of temperature.

A

Fahrenheit

B

Celsius

C

Kelvin

D

All of these

Question 67

Molarity is defined as __________ of a substance __________ one litre of distilled water.

A

Molecular weight, Dissolved in

B

Equivalent weight, Dissolved and made upto

C

Gram molecular weight, Dissolved in

D

Gram molecular weight, Dissolved and made upto

Question 68

Safe disposal of biological specimen should be ensured by which of the following ?

A

Specimen is disposed by burning in open air.

B

Specimen should be placed in an autoclave bag and autoclaved for 1 hour.

C

Specimen is washed down the sink with any disinfectant solution.

D

Specimen is to be stored in sealed bag till it is safe for disposal.

Question 69

Identify the most appropriate anticoagulant for use in blood banking.

A

Citrate Phosphate Dextrose/Acid Citrate Dextrose

B

Ethylene Diamine Tetraacetic Acid (EDTA)

C

Heparin Sulphate

D

Trisodium Citrate

Question 70

Urine specimen preservation is achieved with which of these chemicals ?

A

Sodium molybdate

B

Potassium isocitrate

C

Heparin+EDTA

D

Boric acid

Question 71

Flame photometer is based on characteristic emission by metals when __________.

A

Excited by electron beams.

B

Given sufficient energy in the form of heat.

C

Rapidly heated and cooled.

D

Introduced in a strong magnetic field produced by a hot electrode.

Question 72

Radioactive emission of a liquid specimen can be accurately quantified by which of the following methods ?

A

Geiger muller counter

B

Thermoluminous badges

C

Autoradiography film

D

Scintillation counter

Question 73

From the buffer systems listed below, identify the buffer most important in maintaining blood pH.

A

Carbonic acid-bicarbonate buffer

B

Haemoglobin buffer

C

Phosphate buffer

D

Ammonium buffer

Question 74

Tyndall effect is displayed by __________ when a beam of light is passed through it.

A

Buffers

B

Colloids

C

Suspensions

D

Saturated salt solutions

Question 75

In column chromatography, isocratic elution refers to :

A

Solvent system under high pressure

B

Solvent system with varying polarity

C

Solvent system with negative pressure

D

Solvent system with constant polarity

Question 76

Separation of amino acids by Silica gel thin layer chromatography is based on :

A

Molecular size of amino acids

B

Interaction of amino group of amino acids with stationary phase

C

Interaction of R-group of amino acids with stationary phase

D

Molecular charge of individual amino acids

Question 77

Among the following, identify a protocol not complying with good practices in a clinical biochemistry laboratory.

A

Protocols can be amended by the personnel at their discretion.

B

A record of all approved protocols must be maintained in the laboratory.

C

A record of the qualification of all personnel involved in the laboratory is maintained.

D

Periodic auditing of the facility must be carried out.

Question 78

What is not an advantage of an autoanalyzer in a clinical laboratory ?

A

More accurate than manual methods.

B

Higher sample turnover.

C

Versatility in handling multiple assays simultaneously.

D

None of these.

Question 79

Identify the main benefit of adopting laboratory informatics in a clinical laboratory.

A

Job creation for information technologists.

B

Makes daily laboratory management less user friendly.

C

Databases help in result recording, retrieval, and analysis.

D

Open to data manipulation.

Question 80

Analytical variables can arise from which of the following factors ?

A

Relaxed quality control of equipments involved.

B

Poor standard operating procedures.

C

Lack of rigorous controls in sample collection.

D

All of these.

Question 81

The specific site of action of trypsin is :

A

Peptide bond formed by Carboxyl groups of basic amino acids.

B

Peptide bond formed by Carboxyl groups of aromatic amino acids.

C

Peptide bond formed by Carboxyl groups of hydrophobic amino acids.

D

Peptide bond formed by Carboxyl groups of acidic amino acids.

Question 82

Soret band is observed at :

A

300 nm

B

500 nm

C

600 nm

D

400 nm

Question 83

Enzyme defect in acute intermittent porphyria :

A

Heme synthase

B

PBG deaminase

C

ALA synthase

D

Coproporphyrinogen oxidase

Question 84

Which among the following enzymes is an indicator of vitamin B1 deficiency ?

A

Erythrocyte transketolase

B

Erythrocyte glutathione reductase

C

Erythrocyte glutathione peroxidase

D

Erythrocyte lactate dehydrogenase

Question 85

Which among the following is true for competitive enzyme inhibition ?

A

Km is constant, Vmax decreases

B

Km decreases, Vmax is constant

C

Km increases, Vmax decreases

D

Km increases, Vmax is constant

Question 86

The De Ritis ratio > 2 is seen in :

A

Obstructive jaundice

B

Toxin induced hepatitis

C

Alcoholic hepatitis

D

Acute viral hepatitis

Question 87

The isoenzyme of alkaline phosphatase that is heat stable is found in :

A

Liver

B

Intestine

C

Bone

D

Placenta

Question 88

Low TSH levels with low radioactive iodine uptake is characteristic of :

A

Graves" disease

B

Hashimoto"s disease

C

Toxic nodular goitre

D

Postpartum thyroiditis

Question 89

Which of the following is not true about Taq polymerase used in PCR ?

A

3"-5" polymerase activity

B

5"-3" polymerase activity

C

Thermostable

D

5"-3" exonuclease activity

Question 90

Genetic code is all except :

A

Degenerate

B

Non-universal

C

Triplet

D

Unambiguous

Question 91

About plasmids all are true except :

A

Used as vectors for recombinant DNA technology

B

They are outside bacterial chromosomes

C

Carry antibiotic resistance genes

D

They replicate with bacterial DNA replication

Question 92

Regarding urinary 5-HIAA which among the following is true ?

A

Acidic urine preservatives should be used

B

Spot urine sample cannot be used

C

NaOH should be added to urine before storing

D

The values are not affected by diet

Question 93

Regarding CSF glucose which is correct ?

A

Normal CSF glucose is 60-70% of blood glucose

B

CSF glucose is measured to assess diabetes mellitus

C

CSF/Blood glucose ratio is decreased in hemochromatosis

D

Plasma sample for glucose estimation should be taken at the same as lumbar puncture

Question 94

In pentagastrin test, high acid secretion is observed in :

A

Pernicious anemia

B

ZE syndrome

C

Cancer of stomach

D

Gastric atrophy

Question 95

Staghorn urinary calculus is formed by :

A

Phosphate stones

B

Cysteine stones

C

Uric acid stones

D

Oxalate stones

Question 96

In SDS PAGE electrophoresis :

A

The proteins move towards anode

B

The proteins move towards cathode

C

Even multimeric proteins produce single sharp band

D

pH of buffer is 6.8

Question 97

In which type of ELISA is the absorbance inversely related with antigen concentration ?

A

Direct ELISA

B

Indirect ELISA

C

Competitive ELISA

D

Sandwich ELISA

Question 98

The immunoglobulin increased in secondary response is :

A

IgM

B

IgG

C

IgA

D

IgE

Question 99

The cardiac biomarker that can be used to diagnose heart failure :

A

CKMB

B

Total CK

C

BNP

D

LDH

Question 100

The confirmatory method for identification of drugs of abuse is :

A

ELISA

B

Gas chromatography/mass spectrometry

C

Nephelometry

D

Ion selective electrode

007/2022 - Laboratory Technician Gr II - IMS/ Health etc