1. Which laboratory technique is used to separate proteins based on their size and charge?
A) Polymerase Chain Reaction (PCR)
B) Western Blotting
C) Gel Electrophoresis
D) Chromatography
Answer: C) Gel Electrophoresis
2. What is the purpose of a spectrophotometer in a laboratory?
A) To measure pH levels
B) To determine the concentration of substances based on light absorption
C) To analyze DNA sequences
D) To perform titrations
Answer: B) To determine the concentration of substances based on light absorption
3. Which technique is used to amplify DNA fragments in the laboratory?
A) Polymerase Chain Reaction (PCR)
B) ELISA (Enzyme-Linked Immunosorbent Assay)
C) Immunohistochemistry
D) Southern Blotting
Answer: A) Polymerase Chain Reaction (PCR)
4. What is the purpose of a fume hood in a laboratory?
A) To store chemicals safely
B) To provide a controlled environment for sensitive experiments
C) To prevent exposure to hazardous fumes
D) To maintain a constant temperature
Answer: C) To prevent exposure to hazardous fumes
5. Which laboratory technique is used to separate and analyze DNA fragments based on their size?
A) ELISA
B) PCR
C) Southern Blotting
D) Agarose Gel Electrophoresis
Answer: D) Agarose Gel Electrophoresis
6. What is the primary purpose of a centrifuge in a laboratory?
A) To measure the density of liquids
B) To mix reagents thoroughly
C) To separate substances based on density or mass
D) To sterilize equipment
Answer: C) To separate substances based on density or mass
7. Which laboratory technique is used to visualize the internal structure of cells or tissues?
A) Immunohistochemistry
B) PCR
C) Titration
D) NMR Spectroscopy
Answer: A) Immunohistochemistry
8. What is the role of a pipette in laboratory work?
A) To measure temperature
B) To measure volume and transfer liquids accurately
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To measure volume and transfer liquids accurately
9. Which laboratory technique is used to separate and purify proteins based on their size, charge, and affinity?
A) Chromatography
B) PCR
C) ELISA
D) Gel Electrophoresis
Answer: A) Chromatography
10. What is the purpose of a Bunsen burner in a laboratory?
A) To measure pH levels
B) To provide a source of heat for sterilization and heating solutions
C) To analyze DNA sequences
D) To perform titrations
Answer: B) To provide a source of heat for sterilization and heating solutions
11. Which laboratory technique is used to detect and measure specific proteins or antibodies in a sample?
A) Southern Blotting
B) PCR
C) ELISA
D) Western Blotting
Answer: C) ELISA (Enzyme-Linked Immunosorbent Assay)
12. What is the purpose of a laminar flow hood in a laboratory?
A) To store chemicals safely
B) To provide a sterile environment for sensitive experiments
C) To measure light absorption
D) To perform titrations
Answer: B) To provide a sterile environment for sensitive experiments
13. Which laboratory technique is used to study the structure and interactions of molecules?
A) Gel Electrophoresis
B) X-ray Crystallography
C) PCR
D) ELISA
Answer: B) X-ray Crystallography
14. What is the role of a microtome in laboratory work?
A) To measure volume
B) To perform titrations
C) To cut thin sections of tissues for microscopic analysis
D) To analyze gas concentrations
Answer: C) To cut thin sections of tissues for microscopic analysis
15. Which laboratory technique is used to identify and quantify the elements present in a sample?
A) PCR
B) NMR Spectroscopy
C) Gel Electrophoresis
D) Titration
Answer: B) NMR Spectroscopy (Nuclear Magnetic Resonance Spectroscopy)
16. What is the purpose of a pH meter in a laboratory?
A) To measure temperature
B) To measure acidity or alkalinity of solutions
C) To analyze DNA sequences
D) To perform titrations
Answer: B) To measure acidity or alkalinity of solutions
17. Which laboratory technique is used to determine the concentration of a substance in a solution by reacting it with a known solution?
A) Chromatography
B) PCR
C) Titration
D) ELISA
Answer: C) Titration
18. What is the role of a petri dish in laboratory experiments?
A) To measure volume
B) To perform titrations
C) To culture microorganisms or cells
D) To analyze gas concentrations
Answer: C) To culture microorganisms or cells
19. Which laboratory technique is used to analyze the structure and composition of organic compounds?
A) Chromatography
B) Mass Spectrometry
C) Titration
D) Gel Electrophoresis
Answer: B) Mass Spectrometry
20. What is the purpose of a water bath in a laboratory?
A) To measure temperature
B) To measure acidity or alkalinity
C) To analyze DNA sequences
D) To perform titrations
Answer: A) To measure temperature
21. Which laboratory technique is used to separate and analyze complex mixtures of compounds based on their physical and chemical properties?
A) PCR
B) Chromatography
C) ELISA
D) NMR Spectroscopy
Answer: B) Chromatography
22. What is the role of a balance in laboratory work?
A) To measure volume
B) To measure mass or weight accurately
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To measure mass or weight accurately
23. Which laboratory technique is used to study the interaction between antigens and antibodies?
A) PCR
B) Western Blotting
C) ELISA
D) Gel Electrophoresis
Answer: B) Western Blotting
24. What is the purpose of a hot plate in a laboratory?
A) To measure temperature
B) To measure acidity or alkalinity
C) To analyze DNA sequences
D) To provide a source of heat for experiments
Answer: D) To provide a source of heat for experiments
25. Which laboratory technique is used to study the three-dimensional structure of proteins?
A) Chromatography
B) Mass Spectrometry
C) X-ray Crystallography
D) NMR Spectroscopy
Answer: C) X-ray Crystallography
26. What is the role of a desiccator in laboratory experiments?
A) To measure temperature
B) To provide a controlled environment for reactions
C) To analyze gas concentrations
D) To remove moisture from samples
Answer: D) To remove moisture from samples
27. Which laboratory technique is used to separate and identify components of a mixture based on their boiling points?
A) Chromatography
B) Distillation
C) PCR
D) ELISA
Answer: B) Distillation
28. What is the purpose of a magnetic stirrer in a laboratory?
A) To measure volume
B) To mix solutions using a magnetic field
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To mix solutions using a magnetic field
29. Which laboratory technique is used to measure the absorption of light by molecules in a sample?
A) PCR
B) Spectrophotometry
C) ELISA
D) Gel Electrophoresis
Answer: B) Spectrophotometry
30. What is the role of a centrifugal evaporator in laboratory work?
A) To measure temperature
B) To evaporate solvents from samples using centrifugal force
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To evaporate solvents from samples using centrifugal force
31. Which laboratory technique is used to study the physical and chemical properties of materials at the nanoscale?
A) Nanodrop Spectrophotometry
B) Nanoparticle Analysis
C) Scanning Electron Microscopy (SEM)
D) Gas Chromatography
Answer: C) Scanning Electron Microscopy (SEM)
32. What is the purpose of a pH indicator in laboratory experiments?
A) To measure temperature
B) To measure acidity or alkalinity
C) To analyze DNA sequences
D) To perform titrations
Answer: B) To measure acidity or alkalinity
33. Which laboratory technique is used to study the structure and function of biomolecules within cells?
A) Electron Microscopy
B) Cell Culture
C) PCR
D) ELISA
Answer: A) Electron Microscopy
34. What is the role of a vortex mixer in laboratory work?
A) To measure volume
B) To mix small volumes of liquids rapidly
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To mix small volumes of liquids rapidly
35. Which laboratory technique is used to separate and analyze complex mixtures of proteins based on their size and charge?
A) Gel Electrophoresis
B) Chromatography
C) Mass Spectrometry
D) PCR
Answer: A) Gel Electrophoresis
36. What is the purpose of a centrifuge tube in laboratory experiments?
A) To measure temperature
B) To hold samples during centrifugation
C) To analyze DNA sequences
D) To perform titrations
Answer: B) To hold samples during centrifugation
37. Which laboratory technique is used to study the interaction between proteins and nucleic acids?
A) ELISA
B) Western Blotting
C) Co-immunoprecipitation
D) PCR
Answer: C) Co-immunoprecipitation
38. What is the role of a cryostat in laboratory work?
A) To measure temperature
B) To maintain low temperatures for tissue sectioning
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To maintain low temperatures for tissue sectioning
39. Which laboratory technique is used to analyze the sequence of nucleotides in DNA?
A) PCR
B) Gel Electrophoresis
C) DNA Sequencing
D) ELISA
Answer: C) DNA Sequencing
40. What is the purpose of a bacterial incubator in a laboratory?
A) To measure temperature
B) To provide a controlled environment for bacterial growth
C) To analyze gas concentrations
D) To perform titrations
Answer: B) To provide a controlled environment for bacterial growth
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