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WorksheetsUnit 17 and 18 quiz
Total questions: 15
Worksheet time: 8mins
What is the importance of monitoring microbial growth?
To understand the requirements of microbes for different media
To understand the harmfulness of microbes in the human body
To limit or stop the growth of microbes in the human body
All of the above
Which methods can be used to measure cell mass?
Direct physical method
Direct chemical method
Indirect measurement
All of the above
How can cell numbers be measured?
Microscopic counts using counting chambers
Automated counting chambers
Plate counts
All of the above
What are common problems encountered in cell culture?
Poor cell growth
Abnormal cell morphology
Poor quality or contaminated materials
All of the above
What is the principle of visible light measurement?
Different substances absorb different wavelengths of light
Absorption of electromagnetic radiation between 180 and 1100 nm
UV/VIS spectral region
All of the above
What is the function of a UV-VIS spectrophotometer?
To measure the way light is absorbed by a compound
To identify compounds by analyzing the spectrum of wavelengths absorbed
To determine concentrations of compounds in solution
All of the above
Which sub-domains does the UV/VIS spectral region include?
Near UV, Visible, and Very near infrared
Near UV, Mid UV, and Far UV
Visible, Infrared, and Ultraviolet
None of the above
What is the relationship between frequency and energy of light?
Higher frequency means higher energy
Lower frequency means higher energy
Frequency and energy are not related
None of the above
What is the range of most commercial spectrophotometers?
185 to 900 nm
400 to 700 nm
185 to 1100 nm
700 to 1100 nm
How does a UV-VIS spectrometer identify compounds?
By analyzing the spectrum of wavelengths absorbed
By measuring the concentration of absorbing compounds
By comparing data over a required range
All of the above
What can be measured using direct physical methods for cell mass?
Weight of cells
Volume of cells
Total DNA content
All of the above
Which technique can be used to measure cell numbers?
Microscopic counts using counting chambers
Automated counting chambers
Plate counts
All of the above
What are some common problems encountered in cell culture?
Poor cell growth
Abnormal cell morphology
Poor quality or contaminated materials
All of the above
What can cause poor cell growth in cell culture?
Poor quality or contaminated materials
Calibration issues with equipment
Exposure to the wrong type of environment
All of the above
What can cause abnormal cell morphology in cell culture?
Toxicity
Contamination
Nutritional deficiency
All of the above
