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.
2201 to 2250 MCQs for Lab Technician and Technologist Exam Preparation
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Questions 2201 to 2250
According to Pasteur statements which one of the following is true
- a) Living organisms discriminate between stereoisomers
- b) Fermentation is a aerobic process
- c) Living organisms doesn’t discriminate between stereoisomers
- d) Both a and b
“I found floating therein earthly particles, some green streaks, spirally wound serpent-wise, and orderly arranged, the whole circumstance of each of these streaks was about the thickness of a hair on one’s head”…. These words are of
- a) Leeuwenhoek
- b) Jenner
- c) Pasteur
- d) Koch
The principle light-trapping pigment molecule in plants, Algae, and cyanobacteria is
- a) Chlorophyll a
- b) Chlorophyll b
- c) Porphyrin
- d) Rhodapsin
During Bio Geo chemical cycle some amount of elemental carbon was utilized by the microorganisms. The phenomenon is called as
- a) Dissimilation
- b) Immobilization
- c) Decomposition
- d) Neutralization
Who demonstrated that open tubes of broth remained free of bacteria when air was free of dust.
- a) Abbc Spallanzani
- b) John Tyndall
- c) Francisco Redi
- d) Pasteur
Reverse isolation would be appropriate for
- a) a patient with tuberculosis
- b) a patient who has had minor surgery
- c) a patient with glaucoma
- d) a patient with leukemia
The symptom “general feeling of illness and discomfort” is called
- a) Cystitis
- b) Malaise
- c) Anaphylactic shock
- d) Arthritis
On soybean which of the following forms symbiosis
- a) Azatobactor paspali
- b) Rhizobium
- c) Nostoc
- d) Bradyrhizobium
Who provided the evidence that bacteriophage nucleic acid but not protein enters the host cell during infection
- a) Alfred D. Hershey & Leonard Tatum in 1951
- b) Alfred D. Hershey & Zindar Lederberg in 1951
- c) Alfred D. Hershey & Martha Chase in 1952
- d) Alfred D. Hershey & Macleod in 1952
Spirulina belongs to
- a) Xanthophyceae
- b) Cyanophyceae
- c) Rhodophyceae
- d) Pheophyceae
The first antibody to contact invading microorganisms was
- a) IgG
- b) IgM
- c) IgA
- d) IgD
The light emitted by luminescent bacteria is mediated by the enzyme
- a) Coenzyme Q
- b) Luciferase
- c) Lactose dehydrogenase
- d) Carboxylase reductase
Pick out the vector used in the Human Genome Project
- a) Phagemid vector
- b) Yeast artificial chromosomes
- c) Cosmid vectors
- d) Yeast episomal plasmids
Salt and sugar preserve foods because they
- a) Make them acid
- b) Produce a hypotonic environment
- c) Deplete nutrients
- d) Produce a hypertonic environment
In a fluorescent microscope the objective lens is made of
- a) Glass
- b) Quartz
- c) Polythene
- d) None of these
Fixation of atmospheric nitrogen is by means of
- a) Biological process
- b) Lightning
- c) Ultraviolet light
- d) All of the above
Which one of the following fungi is the most serious threat in a bone marrow transplant unit?
- a) Candida albicans
- b) Aspergillus
- c) Blastomyces
- d) Cryptococcus
Direct microscopic count can be done with the aid of
- a) Neuberg chamber
- b) Anaerobic chamber
- c) Mineral oil
- d) Olive oil
The image obtained in a compound microscope is
- a) Real
- b) Virtual
- c) Real inverted
- d) Virtual inverted
Enzymes responsible for alcoholic fermentation
- a) Ketolase
- b) Zymase
- c) Peroxidase
- d) Oxidase
Which type of spores are produced sexually?
- a) Conidia
- b) Sporangiospores
- c) Ascospores
- d) None of these
Bacterial transformation was discovered by
- a) Ederberg and Tatum
- b) Beadle and Tatum
- c) Griffith
- d) None of these
Father of microbiology is
- a) Louis Pasteur
- b) Lister
- c) A.V. Leeuwenhock
- d) Robert Koch
The antiseptic method was first demonstrated by
- a) Lwanowski
- b) Lord Lister
- c) Edward Jenner
- d) Beijerinck
Smallpox vaccine was first discovered by
- a) Robert Koch
- b) Louis Pasteur
- c) Lister
- d) Edward Jenner
The term mutation was coined by
- a) Pasteur
- b) Darwin
- c) Hugo de Vries
- d) Lamark
Compound microscope was discovered by
- a) Antony von
- b) Pasteur
- c) Johnsen & Hans
- d) None of these
Father of Medical Microbiology is
- a) Pasteur
- b) Jenner
- c) Koch
- d) A.L.Hock
Disease that affects many people in different countries is termed as
- a) Sporadic
- b) Pandemic
- c) Epidemic
- d) Endemic
Prophylaxis of cholera is
- a) Protected water supply
- b) Environmental sanitation
- c) Immunization with killed vaccines
- d) All of these
In electron microscope, what material is used as an objective lens?
- a) Magnetic coils
- b) Superfine glass
- c) Aluminium foils
- d) Electrons
The main feature of prokaryotic organism is
- a) Absence of locomotion
- b) Absence of nuclear envelope
- c) Absence of nuclear material
- d) Absence of protein synthesis
The stalked particles on the cristae of mitochondria are called
- a) Glyoxysomes
- b) Peroxisomes
- c) Oxysomes
- d) Spherosomes
Antiseptic methods were first introduced by
- a) Lord Lister
- b) Iwanowski
- c) Beijernick
- d) Edward Jenner
Kuru disease in humans is caused by
- a) Bacteria
- b) Viroides
- c) Prions
- d) Mycoplasma
A mutation that produces termination codon is
- a) Mis-sense mutation
- b) Neutral mutation
- c) Non-sense mutation
- d) Reverse mutation
During conjugation the genetic material will be transferred through
- a) Cell wall
- b) Medium
- c) Pili
- d) Capsule
Antiseptic surgery was discovered by
- a) Joseph Lister
- b) Ernest Abbe
- c) Pasteur
- d) Beijerink
Tuberculosis is a
- a) Water borne disease
- b) Air borne disease
- c) Food borne disease
- d) Arthropod borne disease
Phagocytic phenomenon was discovered by
- a) Louis Pasteur
- b) Alexander Fleming
- c) Metchnikoff
- d) Robert Koch
Mesosomes are also known as
- a) Mitochondria
- b) Endoplasmic reticulum
- c) Plasmids
- d) Chondroids
Hybridoma technique was first discovered by
- a) Kohler and Milstein
- b) Robert Koch
- c) ‘D’ Herelle
- d) Land Steiner
The minimum number of bacteria required to produce clinical evidence of death in a susceptible animal under standard conditions is called
- a) LD50
- b) ID
- c) MLD
- d) All of these
In Electron Microscope, the source of electrons is from
- a) Mercury lamp
- b) Tungsten metal
- c) Both a and b
- d) None of these
Griffith (1928) reported the phenomenon of transformation first in
- a) H. influenzae
- b) Bacillus species
- c) Pneumococci
- d) E. coli
The resolution power of the compound microscope is
- a) 0.2 micron
- b) 0.2 millimeter
- c) 0.2 Angstrom units
- d) 0.2 centimeter
The capacity of a given strain of microbial species to produce disease is known as
- a) Pathogen
- b) Virulence
- c) Infection
- d) None of these
Monoclonal antibodies are associated with the name of
- a) Burnet
- b) Medwar
- c) Milstein Kohler
- d) Owen
Lederberg and Tatum (1946) described the phenomena of
- a) Conjugation
- b) Transformation
- c) Mutation
- d) Plasmids
Hanging drop method for motility study was first introduced by
- a) Robert Koch
- b) Louis Pasteur
- c) Jenner
- d) Leeuwenhock
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.
