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.
3651 to 3700 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 3651 to 3700
Diagnostic test for the identification of primary syphilis:
- a) VDRL test
- b) Treponema pallidum immobilization test
- c) Kahn’s test
- d) Dark ground microscopic examination
Sporadic summer diarrhea may be caused by
- a) E.coli
- b) Enterobacter
- c) Hafnia
- d) Serratia
Biological false reaction in VDRL is related to
- a) Lepra bacilli
- b) Corynebacterium diphtheria
- c) Cl.welchi
- d) None of these
The best medium for the production of Penicillin is
- a) Nutrient agar
- b) Corn steep liquor
- c) Sulfite waste liquor
- d) Whey
Industrially important Antibiotic producing organisms shall be isolated by
- a) Disk plate method
- b) Direct plate method
- c) Serial dilution method
- d) Crowded plate method
Industrial alcohol will be produced by using starter culture
- a) Top yeast
- b) Middle yeast
- c) Bottom yeast
- d) Feeder yeast
Pyruvate decarboxylase acetaldehyde + CO2 = This reaction is specially observed in
- a) Lactic acid fermentors
- b) Ethanol fermentors
- c) Algae
- d) Plants
The pyruvate dehydrogenase multi-enzyme complex does not occur in
- a) Aerobic bacteria
- b) Microphilic bacteria
- c) Facultative anaerobic bacteria
- d) Strictly anaerobic bacteria
A major ingredient of penicillin production media is
- a) Corn meal
- b) Corn steep liquor
- c) Cane steep liquor
- d) None of these
The outstanding example of traditional microbial fermentation product is
- a) Vinegar
- b) Penicillin
- c) Citric acid
- d) Tetracycline
Which of the following involves the formation of nitrate from ammonia
- a) Ammonification
- b) Denitrification
- c) Nitrification
- d) Nitrogen fixation
First genetically engineered and biotechnologically produced vaccine was against
- a) AIDS
- b) Small pox
- c) Herpes simplex
- d) Hepatitis B
One of the standard cloning vectors widely used in gene cloning is
- a) Ti plasmid
- b) EMBL 3
- c) pBR 322
- d) EMBL 4
In alcoholic fermentation, CO2 is evolved during
- a) Decarboxylation of pyruvic acid
- b) Formation of acetaldehyde
- c) Oxidation of acetaldehyde
- d) Both a and b
In the industrial production of streptomycin, the secondary metabolite or by-products is
- a) Vitamin – B12
- b) Vitamin – C
- c) Vitamin – B6
- d) Ethanol
Tobacco and tea leaves are fermented to give flavour and taste. This type of fermentation is known as
- a) Alcohol fermentation
- b) Curing
- c) Degradation
- d) Lactic acid fermentation
Vinegar fermentation involves
- a) Yeasts only
- b) Yeasts with lactic bacteria
- c) Yeasts with acetic acid bacteria
- d) Yeasts with butyric acid bacteria
Carcinoma refers to
- a) Malignant tumours of the connective tissue
- b) Malignant tumors of the skin or mucous membrane
- c) Malignant tumours of the colon
- d) Malignant tumors of the connective tissue
By-product of acetone-butanol fermentation include
- a) Riboflavin
- b) Penicillin
- c) Isopropanol
- d) All of these
Transgenic animals are for improvement of the quality of
- a) Milk
- b) Meat
- c) Eggs
- d) All of the above
Thermo resistant bacteria are important in the preservation of foods by
- a) Freezing
- b) Canning
- c) Chemicals
- d) Irradiation
The fungus used in the industrial production of citric acid
- a) Rhizopus Oryzae
- b) Fusarium moniliformae
- c) Rhizopus nigricans
- d) Aspergillus nigricans
Penicillin is commercially produced by
- a) P. notatum
- b) P. chrysogenum
- c) P. citrinum
- d) P. roquefortii
The most commonly used microorganism in alcohol fermentation is
- a) Aspergillus niger
- b) Bacillus subtilis
- c) Saccharomyces cerevisiae
- d) Escherichia coli
Vitamin B12 can be estimated and determined by using organism
- a) Lactobacillus sps
- b) Lactobacillus Leichmanni
- c) Bacillus subtilis
- d) E. coli
Batch fermentation is also called
- a) Closed system
- b) Open system
- c) Fed-Batch system
- d) Sub-merger system
To differentiate lactose and non-lactose fermentors the medium used is
- a) Mac Conkey’s medium
- b) Stuart’s medium
- c) Sugar medium
- d) Citrate medium
The micro-organism useful for fermentation are
- a) Bacteria
- b) Yeast
- c) Fungi
- d) None of these
Industrial microbiology, mainly depends on the phenomenon
- a) Pasteurisation
- b) Fermentation
- c) Vaccination
- d) Both b and c
Streptokinase is also termed as
- a) Fibrionolysin
- b) Catalase
- c) Coagulase
- d) Hyaluronidase
Streptokinase is produced by
- a) Staphylococcus aureus
- b) Streptococcus pneumoniae
- c) Str. faecalis
- d) Str. pyogenes
Large vessel containing all the parts and condition necessary for the growth of desired microorganisms is called
- a) Bio reactor
- b) Auto reactor
- c) Impeller
- d) None of these
Basic principle in industrial microbiology is
- a) Suitable growth conditions
- b) Fermentation
- c) Providing aseptic conditions
- d) All of these
For thorough mixing of medium and inoculum the part of fermentor useful is
- a) Shaft
- b) Headspace
- c) Impeller
- d) Sparger
In fermentor the top portion left without broth is called
- a) Shaft
- b) Head space
- c) Impeller
- d) Sparger
Overheating of fermentor during fermentation is controlled by
- a) Cooling jacket
- b) Steam
- c) Cool air
- d) None of these
Antifoam agent is
- a) Silicon compounds
- b) Corn oil
- c) Soyabean oil
- d) All of these
The capacity of laboratory fermentors is
- a) 12–15 liters
- b) 2000 gallons
- c) 500 liters
- d) 10000 gallons
For the production of ethanol the raw material used is
- a) Molasses
- b) Cellulose
- c) Sulphite waste liquor
- d) None of these
Different methods of strain improvement are
- a) Protoplast fusion
- b) Recombinant DNA technique
- c) Genetic recombination
- d) All of these
Protoplasts can be prepared from
- a) Gram positive bacteria
- b) Gram negative bacteria
- c) Both Gram positive bacteria & Gram negative bacteria
- d) None of these
Upto the production of desirable product in the fermentor is called
- a) Upstream process
- b) Downstream process
- c) Surface fermentation
- d) None of these
The purification and recovery of the production after fermentation is called
- a) Upstream process
- b) Downstream process
- c) Surface fermentation
- d) None of these
If the microorganisms are allowed to nutrient medium is called
- a) Submerged fermentation
- b) Surface fermentation
- c) Dual fermentation
- d) All of these
Submerged fermentations are
- a) Batch fermentation
- b) Continuous fermentation
- c) Both a and b
- d) None of these
Batch fermentation is also called
- a) Closed system
- b) Open system
- c) Fed-batch system
- d) None of these
If more than one microorganism is used to obtain the required product, that type of fermentation is called
- a) Batch
- b) Continuous
- c) Dual
- d) Fed-batch
L. lysine is produced from
- a) Coryne bacterium glutamicum
- b) Corynebacterium sps.
- c) Mycobacterium sps.
- d) None of these
Methods used to get immobilized enzymes:
- a) Adsorption
- b) Encapsulation
- c) Covalent bonding
- d) All of these
Raw-material used for the production of alcohol is
- a) Molasses
- b) Starch
- c) Sulphite waste water
- d) All of these
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.
