Cell Biology Laboratory Techniques
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Questions and Answers

What is the primary advantage of using electron microscopy over light microscopy in cell biology?

Higher resolution and magnification

What is the purpose of isoelectric focusing in protein analysis, and how does it differ from gel electrophoresis?

Separation of proteins based on their isoelectric point; differing from gel electrophoresis where separation is based on size and charge

What is the significance of aseptic techniques and good cell culture practice in a cell culture laboratory?

Prevention of contamination and ensuring the health and viability of cells

How does capillary electrophoresis differ from polyacrylamide gel electrophoresis (PAGE) in terms of separation mechanism?

<p>Capillary electrophoresis uses electroosmotic flow, whereas PAGE uses gel matrix to separate molecules</p> Signup and view all the answers

What is the purpose of Western Blotting, and how does it differ from other protein analysis techniques?

<p>To identify and quantify specific proteins; differing from other techniques in its ability to detect specific proteins using antibodies</p> Signup and view all the answers

What is the primary application of 2-D electrophoresis in protein analysis?

<p>Separating proteins based on both charge and size, allowing for the identification of specific protein isoforms.</p> Signup and view all the answers

How does the resolution of light microscopy compare to that of electron microscopy?

<p>The resolution of light microscopy is limited by the wavelength of light, typically around 200-300 nm, whereas electron microscopy can achieve resolutions of around 1-10 nm.</p> Signup and view all the answers

What is the main difference between bacterial cell culture and cell culture techniques used for eukaryotic cells?

<p>Bacterial cell cultures require aseptic techniques and controlled nutrient conditions, whereas eukaryotic cell cultures require more complex medium and a controlled environment.</p> Signup and view all the answers

What is the purpose of fractionation of cells and sub-cellular components?

<p>To isolate specific components or organelles from a cell, allowing for their study and analysis.</p> Signup and view all the answers

What is the main advantage of gel electrophoresis over capillary electrophoresis?

<p>Gel electrophoresis allows for the separation of large DNA molecules and provides a visual representation of the separation, whereas capillary electrophoresis is faster and more sensitive but does not provide a visual representation.</p> Signup and view all the answers

Study Notes

Techniques in Ultrastructure

  • Electron microscopy is used to study the ultrastructure of cells
  • Light microscopy is used to study the morphology of cells and cellular organelles

Cell Isolation and Fractionation

  • Cells and sub-cellular components can be isolated and fractionated using various techniques
  • This allows for the study of specific cellular components and their functions

Cell Culture Techniques

  • Cell culture techniques involve the growth of cells in a controlled laboratory environment
  • Cells are cultured in a cell culture laboratory using specialized equipment and aseptic techniques
  • Aseptic techniques are used to prevent contamination of cells and cell cultures

Cell Culture Laboratory and Equipment

  • A cell culture laboratory is equipped with specialized equipment, including microscopes, centrifuges, and incubators
  • Sterilization equipment, such as autoclaves and laminar flow hoods, are used to maintain a sterile environment

Bacterial Cell Culture

  • Bacterial cell culture involves the growth of bacteria in a controlled laboratory environment
  • Bacterial cells are cultured using specialized techniques and equipment, including agar plates and bacterial incubators

Electrophoresis Techniques

  • Gel electrophoresis is a technique used to separate and analyze proteins and nucleic acids based on their size and charge
  • Capillary electrophoresis is a technique used to separate and analyze proteins and nucleic acids using a capillary tube
  • Polyacrylamide gel electrophoresis (PAGE) is a technique used to separate and analyze proteins based on their size and charge
  • Isoelectric focusing is a technique used to separate and analyze proteins based on their isoelectric point
  • 2-D electrophoresis is a technique used to separate and analyze proteins based on their size and charge in two dimensions

Western Blotting

  • Western blotting is a technique used to detect and analyze specific proteins in a sample
  • It involves the transfer of proteins from a gel to a membrane, followed by detection using antibodies and other reagents

Techniques in Ultrastructure

  • Electron microscopy is used to study the ultrastructure of cells
  • Light microscopy is used to study the morphology of cells and cellular organelles

Cell Isolation and Fractionation

  • Cells and sub-cellular components can be isolated and fractionated using various techniques
  • This allows for the study of specific cellular components and their functions

Cell Culture Techniques

  • Cell culture techniques involve the growth of cells in a controlled laboratory environment
  • Cells are cultured in a cell culture laboratory using specialized equipment and aseptic techniques
  • Aseptic techniques are used to prevent contamination of cells and cell cultures

Cell Culture Laboratory and Equipment

  • A cell culture laboratory is equipped with specialized equipment, including microscopes, centrifuges, and incubators
  • Sterilization equipment, such as autoclaves and laminar flow hoods, are used to maintain a sterile environment

Bacterial Cell Culture

  • Bacterial cell culture involves the growth of bacteria in a controlled laboratory environment
  • Bacterial cells are cultured using specialized techniques and equipment, including agar plates and bacterial incubators

Electrophoresis Techniques

  • Gel electrophoresis is a technique used to separate and analyze proteins and nucleic acids based on their size and charge
  • Capillary electrophoresis is a technique used to separate and analyze proteins and nucleic acids using a capillary tube
  • Polyacrylamide gel electrophoresis (PAGE) is a technique used to separate and analyze proteins based on their size and charge
  • Isoelectric focusing is a technique used to separate and analyze proteins based on their isoelectric point
  • 2-D electrophoresis is a technique used to separate and analyze proteins based on their size and charge in two dimensions

Western Blotting

  • Western blotting is a technique used to detect and analyze specific proteins in a sample
  • It involves the transfer of proteins from a gel to a membrane, followed by detection using antibodies and other reagents

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Description

This quiz covers various techniques used in cell biology laboratories, including microscopy, cell culture, electrophoresis, and Western Blotting. It assesses knowledge of laboratory equipment, procedures, and good laboratory practices.

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