#1
What is the function of a Bunsen burner in a laboratory?
Heating substances
ExplanationProvides a flame for heating substances in laboratory experiments.
#2
Which of the following laboratory apparatus is commonly used for measuring mass?
Analytical balance
ExplanationUsed for measuring the mass of substances with high precision in laboratory experiments.
#3
What is the primary purpose of an autoclave in a laboratory setting?
Sterilizing equipment and media
ExplanationUsed to sterilize laboratory equipment and media by subjecting them to high-pressure steam.
#4
What is the purpose of a fume hood in a laboratory?
Protecting against inhalation of fumes
ExplanationProvides a safe workspace by removing hazardous fumes and chemicals from the laboratory environment.
#5
Which laboratory apparatus is commonly used for heating small amounts of substances or for boiling liquids?
Bunsen burner
ExplanationProduces a controlled flame for heating substances or boiling liquids in laboratory experiments.
#6
What is the purpose of a pH meter in a laboratory?
Determining pH
ExplanationMeasures the acidity or alkalinity of a solution in laboratory experiments.
#7
Which laboratory equipment is used for precise volume measurements of liquids?
Graduated cylinder
ExplanationAllows precise measurement of liquid volumes in laboratory settings.
#8
What is the primary use of a spectrophotometer in a laboratory?
Analyzing light absorption
ExplanationUsed to measure the absorption of light by substances in solution.
#9
Which safety equipment is used to protect the eyes in a laboratory?
Safety goggles
ExplanationProtects the eyes from hazardous materials and chemicals in laboratory environments.
#10
Which gas is commonly used in a laboratory as a fuel for flame-based experiments?
Methane
ExplanationProvides a clean-burning fuel source for laboratory Bunsen burners.
#11
In a microbiology laboratory, what is the purpose of an incubator?
Promoting bacterial growth
ExplanationMaintains optimal temperature and conditions for the growth of microorganisms in laboratory cultures.
#12
What is the primary use of a centrifuge in a laboratory?
Separating components based on density
ExplanationUsed to separate components of a liquid or mixture based on their density using centrifugal force.
#13
What does the acronym PCR stand for in molecular biology?
Polymerase Chain Reaction
ExplanationA method used to amplify DNA sequences in molecular biology.
#14
Which piece of equipment is commonly used for gel electrophoresis in molecular biology?
Electrophoresis chamber
ExplanationUsed to separate DNA, RNA, or proteins based on their size and charge in molecular biology experiments.
#15
Which safety equipment is used to protect the hands in a laboratory?
Gloves
ExplanationProtects the hands from hazardous materials and chemicals in laboratory environments.
#16
In microbiology, what is the purpose of a laminar flow hood?
Maintaining a sterile environment
ExplanationCreates a sterile workspace by directing a continuous flow of filtered air over the work surface, preventing contamination in microbiology experiments.
#17
In molecular biology, what is the primary purpose of a thermal cycler?
DNA amplification through PCR
ExplanationUsed to perform polymerase chain reaction (PCR) for amplifying DNA sequences in molecular biology experiments.