This set of Biochemical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Quantifying Cell Concentration”.
1. What is the use of Cell counting technique?
a) To determine growth rate
b) To determine cell variability
c) To determine health of the cells
d) All of the above mentioned
View Answer
Explanation: Cell counting techniques are used to quantify cells. The quantification allows to determine the complete activity of the cell.
2. What is another for counting chamber?
a) Flow cytometer
b) Hemocytometer
c) Spectrophotometer
d) Coulter Counter
View Answer
Explanation: A counting chamber is also known as hemocytometer. It is a microscopic slide used to count the no. of cells in a single drop of culture.
3. Which of these apparatus uses electrical resistance for the counting of cells?
a) Flow cytometer
b) Hemocytometer
c) Spectrophotometer
d) Coulter Counter
View Answer
Explanation: Coulter counter uses electrical resistance to find out the no. of viable cells. The volume of cells can also be determined by this technique.
4. Which of these is a very expensive technique of cell counting?
a) Flow cytometer
b) Hemocytometer
c) Spectrophotometer
d) Coulter Counter
View Answer
Explanation: Flow cytometry is most expensive because it uses a laser beam for the detection of the no. of cells. This technique also allows to analyze the shape of the cells also.
5. Which instrument is used to determine the no. of cells based on the Beer-Lambert’s law?
a) Flow cytometer
b) Hemocytometer
c) Spectrophotometer
d) Coulter Counter
View Answer
Explanation: Spectrophotometer is used to measure the no. of cells based on the turbidity and color of the samples. The OD obtained from spectrophotometry is directly proportional to the biomass in cell suspension in a range specific to the organism.
6. Microbiologists use cell counting techniques to identify the amount of chemical reagents required for specific activity?
a) True
b) False
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Explanation: Microbiologist use cell counting techniques to study the infectious micro organisms. These studies will reveal their behavior, conditions for growth and etc.
7. Cell counting techniques can be used to determine the cell life expectancy.
a) True
b) False
View Answer
Explanation: The cell life expectancy can be found out using the cell counting techniques. Life expectancy of cancerous cells, harmful effects of toxins, pesticides can be determined by the cell counting technique.
Sanfoundry Global Education & Learning Series – Biochemical Engineering
To practice all areas of Biochemical Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.
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