5000 Plus MCQs for Lab Technician and Technologists are designed to test the knowledge and proficiency of laboratory professionals who work in the field of clinical laboratory science. These questions cover a wide range of topics related to laboratory science, including anatomy, physiology, microbiology, chemistry, and hematology.
2901 to 2950 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 2901 to 2950
The optimal time and temperature required for sterilization in an autoclave is_______?
- a) 140°C x 2 hrs. x 10 lbs pr.
- b) 121°F x 15 mts. x 15 lbs pr.
- c) 121°F x 15 sec. x 15 lbs pr.
- d) 121°C x 15 mts. x 15 lbs pr.
Most antibodies are produced in the________?
- a) Heart and the liver
- b) Brain and the meninges
- c) Thymus and the appendix
- d) Spleen and the lymph nodes
Which of the following antibacterial substance is present in eggs and saliva?
- a) Lysozyme
- b) Secretozyme
- c) Albumin
- d) Isozyme
The major antiseptic value of soap lies in its ability to______?
- a) Kill microbes
- b) Remove microbes
- c) Inhibit microbial growth
- d) Dehydrate microbial cells
Multiple drug resistance of bacteria depends on which of the following________?
- a) Resistance transfer factor (RTF)
- b) Colicigenic factor (Col)
- c) Fertility factor (F+)
- d) All of the above
All are not true for cultivation of anaerobic organisms except___?
- a) Incubator
- b) Anaerobic jar
- c) Refrigerator
- d) Centrifuge
Rideal Walker test is used to determine the efficiency of the_____?
- a) Disinfectant
- b) Moist heat sterilisation
- c) Antibiotics
- d) Dry heat sterilization
Sterilization is_______?
- a) Pathogens killed but spores are not affected
- b) Only pathogenic micro-organisms killed
- c) Non-pathogenic killed
- d) All pathogenic and non-pathogenic microorganisms killed
Compared with autoclave, use of a dry heat oven for sterilization has the following disadvantages_______?
- a) Time-consuming
- b) Less effective
- c) Causes instruments to rust
- d) Causes sharp instruments to dull
Which of the following is not a feature of anaphylaxis?
- a) Delayed reaction
- b) Immediate reaction
- c) Passive transfer by serum
- d) None of the above
Bacterial spores are destroyed by______?
- a) Boiling at 100°C
- b) Disinfection by hypochlorite solution
- c) Autoclave
- d) Pasteurisation
The Ig found in exocrine secretions is_______?
- a) IgG
- b) IgD
- c) IgM
- d) IgA
The interaction of antigens with antibodies on the surface of a mast cell leads to degranulation and anaphylaxis. The mast cell granules produce anaphylaxis because they contain_______?
- a) Lysosomes
- b) Proteolytic enzymes
- c) Lymphotoxins
- d) Vasoactive mediators
Dark ground microscopy is useful to identify_____?
- a) Mycoplasma
- b) Chlamydiae
- c) Rickettsiae
- d) Spirochaetes
The minimum time required for the sterilization of surgical instruments by moist heat at 134°C is_______?
- a) 3 minutes
- b) 15 minutes
- c) 30 minutes
- d) 60 minutes
The best sterilization method for a hand-piece is________?
- a) Ethylene oxide gas
- b) Dry heat
- c) Chemical vapour
- d) All of the above
Example of immune complex hyper-sensitivity reaction is______?
- a) Atopic allergy
- b) Serum sickness
- c) Transfusion reaction
- d) Contact dermatitis
The chemotactic factor is________?
- a) C2a
- b) C3b
- c) C4a
- d) C5a
Steam under pressure is used in __ sterilization?
- a) Pasteurization
- b) Autoclave
- c) Kochs sterilizer
- d) Hot air oven
The predominant immunoglobulin in saliva is_______?
- a) IgA
- b) IgD
- c) IgE
- d) IgG
All are true about Legionella pneumophilia except_______?
- a) Aquatic bodies are main habitat
- b) It can replicate in amoeba
- c) Urine test is a reliable method
- d) Person to person transmission
Each of the following viruses possesses an outer lipoprotein envelope except_______?
- a) Varicella Zoster Virus
- b) Papilloma Virus
- c) Influenza Virus
- d) Human immunodeficiency virus
Actinomycosis is a_____?
- a) Aerobic bacterial disease
- b) Anaerobic bacterial disease
- c) Aerobic fungal disease
- d) Anaerobic fungal disease
Which of the following is true about tetanus acquired through traumatic wound?
- a) Clostridium tetani travels via the nerves to the anterior horn cells in spinal cord
- b) The tetanospasmin component of the exotoxin acts on the post-synaptic neurones and prevents impulse transmission
- c) The patient should be given tetanus toxoid intravenously
- d) Causes positive Nagler reaction
Pseudomonas aeruginosa________?
- a) Produces heat stable enterotoxin
- b) Causes Shangai fever
- c) Cannot be destroyed at 55°C at 1 hr
- d) Does not produce any pigment
Which is not true about Vibrio cholera_____?
- a) It is non-halophilic
- b) Grows on simple media
- c) Man is the only natural host
- d) Cannot survive in extracellular environment
About Bacteroides, true are all except______?
- a) Susceptible to many antibiotics
- b) Present mainly in mixed infections
- c) Most common species is B. fragilis
- d) Bile resistant anaerobes
About N. gonorrhoeae, all are true except_______?
- a) Most common cause of urethritis in male
- b) All strains are highly susceptible to penicillin
- c) Widespread axoregenic strains cause disseminated gonococcal infection
- d) Found exclusively in human beings
Dental Plaque adheres to tooth surface by______?
- a) Dextran
- b) Epithelial cells
- c) Bacteria
- d) Sucrose
Mycobacterium tuberculosis is best demonstrated by_______?
- a) Gram’s stain
- b) H & E stain
- c) Ziehl-Neelsen stain
- d) PAS stain
The spirochete which is associated with fusospirochetosis is______?
- a) Treponema pallidum
- b) Treponema pertenue
- c) Borrelia burgdorferi
- d) Borrelia vincenti
Bacterial species which is protective or beneficial to the host is_______?
- a) Streptococcus sanguis
- b) Porphyromonas gingivalis
- c) Treponema denticola
- d) Spirochetes
An elderly male patient presented with fever, chest pain, and dry cough, sputum culture showed growth on charcoal yeast Extract Medium, the organism is_______?
- a) H. influenza
- b) Moraxella catarrhalis
- c) Legionella
- d) Burkholderia cepacia
Which one of the following enteric organisms is anaerogenic and non-motile?
- a) Shigella sonnei
- b) Salmonella typhi
- c) Proteus mirabilis
- d) Klebsiella pneumonia
The causative organism for cat-scratch disease is_______?
- a) Chlamydia trachomatis
- b) Donovania granulomatis
- c) Bartonella henselae
- d) Hemophilia ducreyi
Erysipelas is caused by________?
- a) Group B staphylococci
- b) Group A streptococci
- c) Gonococci
- d) Pneumococci
Which of the following is obligate aerobe?
- a) Pseudomonas aerogenosa
- b) E. coli
- c) Proteus
- d) Corynebacterium diphtheriae
Staphylococcal toxic shock syndrome (SSS syndrome) is due to_______?
- a) Enterotoxin A
- b) Enterotoxin B
- c) Enterotoxin D
- d) Enterotoxin F
A 6 year old boy comes with abdominal pain, vomiting after consuming milk products within 6 hours. The most likely organism responsible is______?
- a) Staphylococcus aureus
- b) Salmonella
- c) Bacillus cereus
- d) Clostridium botulinum
The most primitive mode of gene transfer occurs by______?
- a) Transduction
- b) Translation
- c) Cell fusion
- d) Conjugation
Antigen used in Weil-Felix reaction______?
- a) E. coli
- b) Haemophilus
- c) Proteus
- d) Staphylococcus
A diabetic patient developed cellulitis due to Staphylococcus aureus, which was found to be Methicillin resistant on the antibiotic sensitivity testing. All of the following antibiotics will be appropriate EXCEPT_______?
- a) Vancomycin
- b) Imipenem
- c) Teicoplanin
- d) Linezolid
Culture medium used for Bordetella pertussis is_______?
- a) Wilson Blair medium
- b) Bile broth
- c) Bordet-Gengou medium
- d) Robertson cooked meat medium
Pasteur developed the vaccine for______?
- a) Anthrax
- b) Rabies
- c) Cholera
- d) All of the above
Teichoic acid is present in cell walls of________?
- a) Gram positive bacteria
- b) Gram negative bacteria
- c) Yeast
- d) Protozoa
Pathogenic treponemas can be maintained in______?
- a) Tissue culture
- b) Chick embryos
- c) Artificial media
- d) Rabbit testis only
Borrelia vincenti is a_____?
- a) Mycoplasma
- b) Mycobacteria
- c) Spirochaete
- d) Chlamydia
All of the following lab tests can be used to distinguish Streptococcus mutans from other oral streptococci, except_____?
- a) Gram staining
- b) Fermentation of mannitol and sorbitol
- c) Production of intracellular and extracellular adherent polysaccharide
- d) Colony morphology on saliva agar
Which of the following bacterial species is most classically associated with transmission via ticks and handling of infected lagomorphs (rabbits)?
- a) Pasturella spp
- b) Francisella spp
- c) Bartonella spp
- d) Brucella spp
Pneumococcus can be differentiated from Streptococcus by______?
- a) Type of hemolysis
- b) Gram staining
- c) Growth characteristics
- d) Bile solubility
Answer Key Summary
The questions are typically designed to assess the technical skills and knowledge required for the laboratory profession, including the ability to analyze laboratory test results, perform laboratory procedures, and maintain laboratory equipment.
To prepare for these MCQs, candidates should have a thorough understanding of the key concepts and principles of laboratory science. They should also be familiar with common laboratory equipment and procedures, as well as laboratory safety protocols.
Candidates may also benefit from studying specific laboratory science textbooks or taking online courses that cover the material tested in the MCQs. Additionally, practicing sample MCQs and reviewing the answers can help candidates identify areas where they may need to improve their knowledge or skills.
Overall, the MCQs for lab technologists are designed to be challenging and comprehensive, requiring candidates to demonstrate a high level of proficiency in the field of laboratory science.
