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.
2801 to 2850 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 2801 to 2850
Toxoids are____?
- a) antigenic and toxic
- b) antigenic and non-toxic
- c) non-antigenic and toxic
- d) non-antigenic and non-toxic
Human immunoglobulins are divided based on_____?
- a) Functional differences
- b) Structural differences
- c) Complement fixation
- d) None of the above
IgG antibodies have a half-life of approximately_____?
- a) 1 hour
- b) 1 day
- c) 1 week
- d) 1 Month
The distinguishing characteristic of a positive delayed type hypersensitivity skin test is______?
- a) Erythema
- b) Necrosis
- c) Induration
- d) Vasculitis
The medium of choice for growing most fungi is_____?
- a) Blood agar
- b) Tissue culture
- c) Sabouraud’s agar
- d) Thioglycollate medium
Robertsons cooked meat medium is best suited for cultivation of______?
- a) Clostridia
- b) S. epidermidis
- c) Choleria
- d) Mycobacterium
Dry heat destroys microorganisms by____?
- a) Lysis
- b) Oxidation
- c) Hydrolysis of DNA
- d) Coagulation of proteins
The anaphylaxis should be treated first with______?
- a) Epinephrine
- b) Steroids
- c) Anti histamines
- d) Antibiotics
Which of the following is not a koch’s postulate ?
- a) The bacteria should be able to be isolated from a diseased tissue
- b) When inoculated in experimental animals bacteria may or may not cause disease
- c) Pure cultures can be obtained
- d) Bacteria should be able to be isolated from the diseased tissue in the experimental animals
In penicillin allergy, penicillin acts as a_______?
- a) Hapten
- b) Carrier
- c) Super antigen
- d) Toxin
Which of the following is not true of boiling water_____?
- a) It can kill hepatitis B virus
- b) Used for sterilizing surgical instruments
- c) Can kill mycobacterium tuberculosis
- d) Can kill vegetative bacterial cells
Sunlight acts as sterilizing agent because______?
- a) Long wavelength
- b) short wave length
- c) Ozone
- d) Heat
Tyndallisation is carried out for_____?
- a) One day
- b) Two successive days
- c) 60 minutes
- d) Three successive days
A type of immediately occurring reaction in which antigens combine with antibodies already attached to the surface of mast cells and basophils is called____?
- a) Type I hypersensitivity
- b) Type II hypersensitivity
- c) Type III hypersensitivity
- d) Type IV hypersensitivity
Best method of sterilizing disposable syringes______?
- a) Hot air oven
- b) U.V. rays
- c) Gamma rays
- d) Boiling
Glutaraldehyde is preferred more than formaldehyde because______?
- a) It has got more bactericidal activity
- b) It has got more bacteriostatic activity
- c) It has got no deleterious effect on the cement and lenses of instruments
- d) Its application is easier
Sterilization of liquid paraffin is done by_____?
- a) Autoclaving
- b) Hot air oven
- c) UV-Radiation
- d) Inspissation
Who first introduced solid media______?
- a) Louis pasteur
- b) Robert koch
- c) Hensen
- d) Ogston
Disinfection of the rooms can be done by using_____?
- a) 20% phenol
- b) High efficiency particle arrestors
- c) 40% formaldehyde vapour
- d) Chlorine gas
The component that sensitizes bacteria and virus to UV irradiation______?
- a) Lipids
- b) Carbohydrates
- c) Inorganic salts
- d) Nucleic acids
The difference between sterilization and disinfection is that____?
- a) Disinfection kills all spores but sterilization does not
- b) Sterilization kills all spores but disinfection does not
- c) Sterilization involves chemicals and disinfection involves physical methods
- d) Sterilization is easier to achieve
Blood agar is______?
- a) Simple media
- b) Transport media
- c) Enriched media
- d) Differential media
By using phase contrast microscope______?
- a) Internal structures are differentiated in living cells
- b) Internal structures are differentiated in dead cells
- c) Internal metabolic activities can be observed
- d) External capsule formation can be observed
Exotoxins are_____?
- a) Lipid-polysaccharide complex
- b) Protein compound
- c) Lipoprotein
- d) None
Zero growth rate is observed during one of the phase of the bacterial growth curve______?
- a) Lag
- b) Exponential growth
- c) Stationary phase
- d) Decline
Hot air oven cannot be used for sterilizing_____?
- a) Clothes
- b) Instruments
- c) Culture media
- d) Needles
Type of receptor present on T-cells are_____?
- a) Ig A
- b) Ig G
- c) Prostaglandins
- d) CD4
In patients with asthma due to an allergic cause the serum levels of which immunoglobulin increase_____?
- a) IgD
- b) IgM
- c) IgA
- d) IgE
Which of the following immunoglobulins has the highest mean serum concentration in humans_____?
- a) IgA
- b) IgD
- c) IgG
- d) IgM
The term animalcules to oral microorganisms is given by_____?
- a) Wd miller
- b) Leumenhoek
- c) Robertson
- d) Socranci
Immunoglobulin crossing placenta is______?
- a) Ig M
- b) Ig A
- c) Ig G
- d) Ig D
Sterilization is a process in which______?
- a) Kill all pathogenic micro-organisms
- b) Kill all non-pathogenic micro-organisms in the environment
- c) Deactivate all pathogens not spores
- d) Deactivate all spores and all pathogenic organisms
The key cell types involved in the acquired immunity include all EXCEPT_____?
- a) B lymphocytes
- b) Erythrocytes
- c) T lymphocytes
- d) Antigen presenting cells (APC)
Complement factor through which common pathway begins_____?
- a) C3
- b) C5
- c) C2
- d) Protein B
Which of the following organisms does NOT react with Gram’s stain?
- a) Actinomyces israelii
- b) Candida albicans
- c) Mycobacterium tuberculosis
- d) Streptococcus mutans
Phase contrast microscopy is based on principle of_______?
- a) Different refractive indices of object
- b) Different reflective indices of object
- c) Light scattering
- d) Light attenuation
Cold sterilization refers to the process of sterilization by use of_____?
- a) Ultra violet rays
- b) Ultrasonic vibrations
- c) Infrared rays
- d) Gamma rays
The term epitope refers to_____?
- a) complete antigen molecule
- b) Hapten
- c) Immunogen
- d) Smallest antigenic determinant
The Process of attenuation can be achieved by all except______?
- a) Growing bacteria in adverse environment
- b) Growing bacteria in unconventional host
- c) Serial passage in an experimental host
- d) Repeated cultures in artificial media
Post streptococcal acute glomerulo nephritis is an example of_______?
- a) Type I hypersensitivity
- b) Type II hypersensitivity
- c) Type III hypersensitivity
- d) Type IV hypersensitivity
Bacterial cell does not possess_____?
- a) DNA
- b) Ribosome
- c) Mitochondria
- d) Cell wall
The Manufacturing unit of surgical needle & sutures are sterilized by _?
- a) Gamma-Rays
- b) X-Rays
- c) Autoclaving
- d) Boiling
A child presents with infective skin lesions of the leg. Culture was done which showed gram positive cocci in chains and haemolytic colonies. Which of the following tests will best identify the organism?
- a) Bile solubility
- b) Optochin sensitivity
- c) Bacitracin sensitivity
- d) Catalase positive
Purpose of Sterilization is to eliminate______?
- a) Bacteria
- b) Viruses
- c) Spore formers
- d) Fungus
Cell wall deficient bacteria are______?
- a) Escherichia Coli
- b) Staphylococci
- c) Spirochetes
- d) Mycoplasma
The type of immunoglobulin most commonly increased in multiple myeloma is_____?
- a) IgG
- b) IgA
- c) IgM
- d) IgD
The function of IgD is_______?
- a) Antigen recognition by B cells
- b) Localization protection in external secretion
- c) Compliment activation
- d) Reagin activity
Cleavage of IgG molecule by Papin gives rise to: One Fc fragment and two Fab fragments_____?
- a) One Fc fragment and two Fab fragments
- b) One Fc fragment and four Fab fragments
- c) Two Fc fragments and two Fab fragments
- d) Two Fc fragment and one Fab fragment
Physical sterilization was discovered by______?
- a) Robert Koch
- b) Joseph Lister
- c) John Hunter
- d) Alexander Fleming
The best method of sterilization of dressing powder is____?
- a) Autoclaving
- b) Hot air oven
- c) Inspissation
- d) Tyndallization
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.
