Maryland Biotechnology Laboratory
Assistant Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A key responsibility of a biotechnology laboratory assistant is to ensure
that all biological samples are handled according to biosafety
standards. Which of the following best describes the primary purpose
of biosafety protocols in a laboratory environment?
A. To maximize experimental speed while reducing documentation
requirements
B. To ensure accurate statistical analysis of research data
C. To prevent contamination, protect personnel, and maintain sample
integrity
D. To eliminate exposure to infectious agents and maintain a safe
working environment
Biosafety protocols are designed to reduce risk of exposure to
biological hazards while also preventing contamination of samples
and protecting laboratory personnel, ensuring both safety and data
reliability.
,2. In a biotechnology laboratory, which piece of equipment is most
appropriate for separating components of blood based on density?
A. Spectrophotometer
B. Incubator
C. Autoclave
D. Centrifuge
A centrifuge is specifically used to separate substances of different
densities by spinning samples at high speeds, making it essential for
blood fractionation and many biotech procedures.
3. Which of the following best describes the role of aseptic technique in
laboratory practice?
A. Increasing the speed of chemical reactions
B. Enhancing the sensitivity of analytical instruments
C. Measuring microbial growth rates accurately
D. Preventing contamination of cultures, specimens, and equipment
Aseptic technique is used to maintain sterility and prevent
contamination of both samples and the environment, which is critical
in biotechnology and microbiology labs.
4. A laboratory assistant is preparing to dispose of biohazardous waste.
Which method is most appropriate for ensuring complete
decontamination before disposal?
A. Air drying at room temperature
B. Rinsing with distilled water only
C. Freezing at -20°C
D. Autoclaving at appropriate temperature and pressure
Autoclaving uses steam under pressure to sterilize biohazardous
materials, effectively destroying microorganisms before disposal.
5. Which molecular technique is most commonly used to amplify small
quantities of DNA for analysis?
, A. Gel electrophoresis
B. Western blotting
C. ELISA
D. Polymerase chain reaction (PCR)
PCR is widely used in biotechnology to amplify specific DNA
sequences, enabling detection and analysis of genetic material from
minimal samples.
6. What is the primary function of a spectrophotometer in a
biotechnology laboratory?
A. Sterilizing glassware
B. Separating proteins by size
C. Maintaining cell cultures
D. Measuring the absorbance of light by a sample to determine
concentration
Spectrophotometers measure how much light a substance absorbs,
allowing scientists to determine concentrations of nucleic acids,
proteins, and other molecules.
7. Which safety device is specifically designed to protect laboratory
personnel from exposure to airborne biological agents?
A. Chemical fume hood
B. Dry heat oven
C. Laminar flow bench
D. Biological safety cabinet
A biological safety cabinet provides controlled airflow and filtration
to protect workers, samples, and the environment from infectious
aerosols.
8. In DNA gel electrophoresis, what property determines the movement
of DNA fragments through the gel?
A. Electrical resistance of the gel matrix
Assistant Certification Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A key responsibility of a biotechnology laboratory assistant is to ensure
that all biological samples are handled according to biosafety
standards. Which of the following best describes the primary purpose
of biosafety protocols in a laboratory environment?
A. To maximize experimental speed while reducing documentation
requirements
B. To ensure accurate statistical analysis of research data
C. To prevent contamination, protect personnel, and maintain sample
integrity
D. To eliminate exposure to infectious agents and maintain a safe
working environment
Biosafety protocols are designed to reduce risk of exposure to
biological hazards while also preventing contamination of samples
and protecting laboratory personnel, ensuring both safety and data
reliability.
,2. In a biotechnology laboratory, which piece of equipment is most
appropriate for separating components of blood based on density?
A. Spectrophotometer
B. Incubator
C. Autoclave
D. Centrifuge
A centrifuge is specifically used to separate substances of different
densities by spinning samples at high speeds, making it essential for
blood fractionation and many biotech procedures.
3. Which of the following best describes the role of aseptic technique in
laboratory practice?
A. Increasing the speed of chemical reactions
B. Enhancing the sensitivity of analytical instruments
C. Measuring microbial growth rates accurately
D. Preventing contamination of cultures, specimens, and equipment
Aseptic technique is used to maintain sterility and prevent
contamination of both samples and the environment, which is critical
in biotechnology and microbiology labs.
4. A laboratory assistant is preparing to dispose of biohazardous waste.
Which method is most appropriate for ensuring complete
decontamination before disposal?
A. Air drying at room temperature
B. Rinsing with distilled water only
C. Freezing at -20°C
D. Autoclaving at appropriate temperature and pressure
Autoclaving uses steam under pressure to sterilize biohazardous
materials, effectively destroying microorganisms before disposal.
5. Which molecular technique is most commonly used to amplify small
quantities of DNA for analysis?
, A. Gel electrophoresis
B. Western blotting
C. ELISA
D. Polymerase chain reaction (PCR)
PCR is widely used in biotechnology to amplify specific DNA
sequences, enabling detection and analysis of genetic material from
minimal samples.
6. What is the primary function of a spectrophotometer in a
biotechnology laboratory?
A. Sterilizing glassware
B. Separating proteins by size
C. Maintaining cell cultures
D. Measuring the absorbance of light by a sample to determine
concentration
Spectrophotometers measure how much light a substance absorbs,
allowing scientists to determine concentrations of nucleic acids,
proteins, and other molecules.
7. Which safety device is specifically designed to protect laboratory
personnel from exposure to airborne biological agents?
A. Chemical fume hood
B. Dry heat oven
C. Laminar flow bench
D. Biological safety cabinet
A biological safety cabinet provides controlled airflow and filtration
to protect workers, samples, and the environment from infectious
aerosols.
8. In DNA gel electrophoresis, what property determines the movement
of DNA fragments through the gel?
A. Electrical resistance of the gel matrix
