BIO 101 LAB Quiz 1 | Latest Update |
2024/2025 | 100% Pass
What is the purpose of using a spectrophotometer in the lab?
A spectrophotometer measures the absorbance or transmission of light through a solution,
which can be used to determine the concentration of solutes.
How do you corr...
What is the purpose of using a spectrophotometer in the lab?
✔✔ A spectrophotometer measures the absorbance or transmission of light through a solution,
which can be used to determine the concentration of solutes.
How do you correctly handle and store microscope slides?
✔✔ Handle slides by the edges to avoid smudging the surfaces and store them in a slide box to
protect them from damage and contamination.
What is the function of the fine adjustment knob on a microscope?
✔✔ The fine adjustment knob is used for precise focusing of the specimen, especially at higher
magnifications.
1
, What are the key differences between plant and animal cells that can be observed under a
microscope?
✔✔ Plant cells have a rigid cell wall, chloroplasts, and a large central vacuole, while animal cells
have a more flexible membrane and smaller vacuoles.
What is the significance of calibrating a microscope before use?
✔✔ Calibrating a microscope ensures accurate measurements and observations by aligning the
scales and adjusting the focus to correct standards.
How do you perform a Gram stain, and what does it reveal about bacterial cells?
✔✔ The Gram stain differentiates bacteria into Gram-positive or Gram-negative based on cell
wall characteristics, revealing differences in cell wall structure and aiding in bacterial
classification.
Why is it important to use proper disposal methods for biological waste in the lab?
2
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