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Cell Culture and Bioreactors

Description: This quiz evaluates your understanding of cell culture and bioreactors, including cell growth, media composition, bioreactor types, and applications.
Number of Questions: 15
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Tags: cell culture bioreactors cell growth media composition bioreactor types applications
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Which of the following is a key factor influencing cell growth in culture?

  1. Temperature

  2. pH

  3. Oxygen concentration

  4. All of the above


Correct Option: D
Explanation:

Cell growth in culture is influenced by a combination of factors, including temperature, pH, oxygen concentration, and the composition of the culture medium.

What is the primary function of a bioreactor in cell culture?

  1. To provide a controlled environment for cell growth

  2. To separate cells from the culture medium

  3. To harvest cell products

  4. To sterilize the culture medium


Correct Option: A
Explanation:

Bioreactors are designed to provide a controlled environment for cell growth, ensuring optimal conditions for cell proliferation and product production.

Which type of bioreactor is commonly used for large-scale cell culture?

  1. Stirred-tank bioreactor

  2. Airlift bioreactor

  3. Hollow-fiber bioreactor

  4. Packed-bed bioreactor


Correct Option: A
Explanation:

Stirred-tank bioreactors are widely used for large-scale cell culture due to their ability to provide efficient mixing and oxygen transfer, as well as their scalability.

What is the purpose of adding serum or growth factors to cell culture media?

  1. To provide nutrients for cell growth

  2. To stimulate cell proliferation

  3. To prevent cell differentiation

  4. All of the above


Correct Option: D
Explanation:

Serum or growth factors are added to cell culture media to provide essential nutrients, stimulate cell proliferation, and prevent cell differentiation, ensuring optimal cell growth and function.

Which of the following is a common method for cell harvesting in bioreactors?

  1. Centrifugation

  2. Filtration

  3. Flocculation

  4. All of the above


Correct Option: D
Explanation:

Cell harvesting in bioreactors can be achieved through various methods, including centrifugation, filtration, and flocculation, depending on the specific cell type and culture conditions.

What is the primary application of cell culture in biotechnology?

  1. Production of therapeutic proteins

  2. Development of vaccines

  3. Tissue engineering

  4. All of the above


Correct Option: D
Explanation:

Cell culture is widely used in biotechnology for the production of therapeutic proteins, development of vaccines, tissue engineering, and other applications that require the growth and manipulation of cells in a controlled environment.

Which type of bioreactor is suitable for shear-sensitive cells?

  1. Stirred-tank bioreactor

  2. Airlift bioreactor

  3. Hollow-fiber bioreactor

  4. Packed-bed bioreactor


Correct Option: B
Explanation:

Airlift bioreactors are often preferred for shear-sensitive cells due to their gentle mixing mechanism, which minimizes cell damage and maintains cell viability.

What is the role of pH control in cell culture?

  1. To maintain optimal enzyme activity

  2. To prevent cell damage

  3. To regulate cell metabolism

  4. All of the above


Correct Option: D
Explanation:

pH control in cell culture is crucial for maintaining optimal enzyme activity, preventing cell damage, regulating cell metabolism, and ensuring overall cell health and function.

Which of the following is a common type of cell culture medium?

  1. Dulbecco's Modified Eagle Medium (DMEM)

  2. Ham's F-12 Medium

  3. RPMI 1640 Medium

  4. All of the above


Correct Option: D
Explanation:

Dulbecco's Modified Eagle Medium (DMEM), Ham's F-12 Medium, and RPMI 1640 Medium are widely used types of cell culture media, each formulated to support the growth and maintenance of specific cell types.

What is the purpose of using antibiotics in cell culture?

  1. To prevent bacterial contamination

  2. To select for specific cell types

  3. To induce cell differentiation

  4. None of the above


Correct Option: A
Explanation:

Antibiotics are added to cell culture media to prevent bacterial contamination, which can compromise cell growth and viability, and potentially lead to culture failure.

Which of the following is a key factor to consider when designing a bioreactor?

  1. Cell type and growth requirements

  2. Scale of operation

  3. Product requirements

  4. All of the above


Correct Option: D
Explanation:

When designing a bioreactor, it is essential to consider the specific cell type and its growth requirements, the scale of operation, and the desired product characteristics, to ensure optimal cell growth and product production.

What is the primary function of a sparger in a bioreactor?

  1. To introduce oxygen into the culture medium

  2. To remove carbon dioxide from the culture medium

  3. To control the pH of the culture medium

  4. To regulate the temperature of the culture medium


Correct Option: A
Explanation:

The primary function of a sparger in a bioreactor is to introduce oxygen into the culture medium, ensuring an adequate supply of oxygen for cell growth and metabolism.

Which type of cell culture is commonly used for studying cell-cell interactions?

  1. Monolayer culture

  2. Suspension culture

  3. Three-dimensional culture

  4. Organoid culture


Correct Option: C
Explanation:

Three-dimensional cell culture systems, such as spheroids or organoids, are often used to study cell-cell interactions, as they provide a more physiologically relevant environment that mimics the organization and architecture of tissues.

What is the purpose of using aseptic techniques in cell culture?

  1. To prevent contamination

  2. To maintain sterility

  3. To ensure cell viability

  4. All of the above


Correct Option: D
Explanation:

Aseptic techniques are employed in cell culture to prevent contamination, maintain sterility, and ensure cell viability by minimizing the introduction of microorganisms and other contaminants into the culture environment.

Which of the following is a common method for cell counting in cell culture?

  1. Hemocytometer

  2. Flow cytometry

  3. Spectrophotometry

  4. Colony counting


Correct Option: A
Explanation:

Hemocytometer is a widely used method for cell counting in cell culture, involving the use of a specialized counting chamber to manually count cells under a microscope.

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