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.
2301 to 2350 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 2301 to 2350
T. pallidum was discovered by
- a) Robert Koch
- b) Schaudinn and Hoffman
- c) Louis Pasteur
- d) Edward Jenner
Neisseria gonorrhoeae was first described by
- a) Neisser in 1879
- b) Pasteur in 1878
- c) Robert Koch
- d) None of these
Rh factor of the blood was discovered by scientist
- a) Louis Pasteur
- b) Landsteiner and Weiner
- c) Janskey
- d) Moss
- e) None of these
Trepanema pallidum was discovered by
- a) Schaudinn and Hoffman
- b) Louis Pasteur
- c) Burgey
- d) Laennec
- e) None of these
Fluroscent substance used in fluorescent microscopy are
- a) Quinine sulphate
- b) Auramine
- c) All of these
- d) None of these
Cold like symptoms are caused by which bacteria
- a) Pseudomonas
- b) E.coli
- c) Haemophilus influenza
- d) Haemophilus streptococcus
In Streptococcus fecalis, the conjugation takes place at
- a) Pili
- b) Cell membrane
- c) Cell wall
- d) Flagella
The infected mad dogs may contain
- a) Nergi bodies
- b) Niagri bodies
- c) Negri bodies
- d) Neisser bodies
What disease the Nesser will produce?
- a) Mumps
- b) Rubella
- c) Polio
- d) Measles
Rancidity in spoiled foods is due to
- a) Lipolytic organisms
- b) Proteolytic organisms
- c) Toxigenic microbes
- d) Saccharolytic microbes
The Bacterium that is most commonly used in genetic engineering is
- a) Escherichia
- b) Klebsiella
- c) Proteius
- d) Serratia
The functions of plasmid are
- a) DNA replication
- b) Protein synthesis
- c) Cell wall synthesis
- d) None of the above
Mycoplasmas are bacterial cells that
- a) Fail to reproduce on artificial media
- b) Have a rigid cell wall
- c) Are resistant to penicillin
- d) Stain well with Gram’s stain
The etiologic agent of botulism is a
- a) Neurotoxin
- b) Endotoxin
- c) Enterotoxin
- d) All of the above
The bacterial cells are at their metabolic peak during
- a) Lag phase
- b) Log
- c) Stationary
- d) Decline
Protein particles which can infect are called
- a) Virons
- b) Prions
- c) Nucleoida
- d) None of these
In most of purple bacteria, the light harvesting centers are
- a) B 850 & Fe-S
- b) B 850 & B 875
- c) B 845 & B 875
- d) B 850 & B830
Endotoxin produced by gram-negative bacteria is present in
- a) Peptidoglycan
- b) Lipopolysaccharide
- c) Teichoic acid
- d) Inner membrane
Which one of the following was Gram-negative, chemolithotrophic bacteria?
- a) Siderococcus
- b) E.coli
- c) Spirellum
- d) Mycoplasms
The mode of reproduction which occurs in mycoplasma is
- a) Budding
- b) Bursting
- c) Binary fission
- d) Binary fusion
Which one of the following is about Herpes viruses?
- a) Icosahedral, with envelope, ds DNA
- b) Polyhedral with envelope, ds DNA
- c) RNA, helical with envelope
- d) ds DNA, brick shape
Which one of the following produce typical fried egg appearance colonies on solid media?
- a) Mycobacteria
- b) Mycoplasts
- c) Mycoplasms
- d) Bacteroides
An organism that is osmophilic and has a specific requirement for sodium chloride resembles
- a) Halophile
- b) Basophile
- c) Barophile
- d) Xerophile
A population of cells derived from a single cell are called
- a) Monoclonal cells
- b) Clones
- c) Protoplasts
- d) Sub culture
Heterolactic acid bacteria produce
- a) Lactic acid only
- b) Lactic acid + H2O + CO2
- c) Lactic acid + CO2
- d) Lactic acid + alcohol + CO2
In which of the following microorganisms, conjugation tube was not produced during the conjugation process?
- a) Thiobacillus thiooxidance
- b) T. ferrooxidance
- c) Tetrahymena thermophila
- d) Cryptaporiclium
Which of the following is most similar to Rickettsia and Chlamydia?
- a) Bdellovibrio
- b) Clostridium
- c) Mycobacterium
- d) Myxocladium
How would you distinguish Pseudomonas species from E. coli?
- a) Gram staining
- b) Morphology
- c) Glucose fermentation vs Respiration
- d) All of the above
Which of the following is pathogenic to humans?
- a) Spirogyra
- b) Cephaleuros
- c) Prototheca
- d) Both b and c
Tumor-inducing plasmids are extensively used in the production of:
- a) Avirulent phases
- b) Single cell proteins
- c) Transgenic plants
- d) Nitrogen fixing bacteria
The viruses that live as parasites on bacteria are:
- a) Fungi
- b) Commensals
- c) Bacteriophages
- d) None of these
The anthrax disease is most frequently acquired from:
- a) Cattle
- b) Sheeps
- c) Rats
- d) Both a and b
The colonies produced by Pseudomonas on MacConkey’s medium are:
- a) Purple colored
- b) Pink colored
- c) Pale colored
- d) Green colored
Staining material of Gram-positive bacterium is:
- a) Fast green
- b) Haematoxylon
- c) Crystal violet
- d) Safranin
The pigment present in red algae is:
- a) Rhodochrome
- b) Fucoxanthin
- c) Chlorophyll only
- d) Chlorophyll + phycobilin
During mitosis, synapsis occurs in the phase called:
- a) Telophase
- b) Anaphase
- c) Prophase
- d) None of the above
Which of the following changes is a transition?
- a) ATGC → ATCC
- b) ATGC → ATGG
- c) ATGC → AGGC
- d) None of these
Citrus canker is caused by:
- a) Phytomonas
- b) Salmonella
- c) Lactobacillus
- d) Hay bacillus
Bacteria that are responsible for fermentation of dairy milk are:
- a) Azetobacter
- b) Rhizobium
- c) Lactobacillus
- d) Hay bacillus
The fungal disease that affects the internal organs and spreads throughout the body are called:
- a) Mycoses
- b) Systemic mycoses
- c) Mycotoxicosis
- d) Superficial mycoses
The staining technique used to stain the metachromatic granules of Corynebacterium is:
- a) Giemsa stain
- b) Alberts stain
- c) Acid fast staining
- d) Both a and b
The orderly increase in all components of protoplasm of a cell is called:
- a) Reproduction
- b) Cell division
- c) Growth
- d) All of the above
The causative organism of cholera, i.e., Vibrio, shows the movement called:
- a) Gliding movement
- b) Darting movement
- c) Pseudopodal movement
- d) None of these
Erythrocytes get their ATP energy only by:
- a) Glycolysis
- b) Kreb’s cycle
- c) Electron Transport
- d) HMP shunt
Virus will contain:
- a) Cell membrane
- b) Cell wall
- c) DNA
- d) DNA or RNA
The bacterial pili mainly contain:
- a) Carbohydrates
- b) Lipids
- c) Proteins
- d) Minerals
The wonder drug of the Second World War is produced by:
- a) Algae
- b) Fungi
- c) Bacteria
- d) Plants
Role of bacteria in the carbon cycle is:
- a) Photosynthesis
- b) Chemosynthesis
- c) Breakdown of organic compounds
- d) Assimilation of nitrogen compounds
Centromere is that part of chromosome where:
- a) Nucleoli are formed
- b) Crossing over takes place
- c) Chromatids are attached
- d) Nakeding occurs
Somatic cells of the adult body are haploid in many, except:
- a) Vertebrates
- b) Invertebrates
- c) Fungi
- d) Vascular plants
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.
