Podcast
Questions and Answers
What is the main function of the sugar chains located on the outer surface of the plasma membrane?
What is the main function of the sugar chains located on the outer surface of the plasma membrane?
- Providing stability to the membrane
- Facilitating the movement of phospholipid molecules
- Adhering to neighboring cells (correct)
- Modulating membrane fluidity
Which organelle is responsible for carrying out the function of transporting small polar molecules like glucose and ions like Na/K pump?
Which organelle is responsible for carrying out the function of transporting small polar molecules like glucose and ions like Na/K pump?
- Lysosomes
- Rough endoplasmic reticulum (RER)
- Mitochondria
- Golgi apparatus (correct)
What is the role of transmembrane proteins in the cell membrane?
What is the role of transmembrane proteins in the cell membrane?
- Providing stability to the membrane
- Modulating membrane fluidity
- Stabilizing the membrane structure
- Acting as receptors for ligands (correct)
What is the function of integral (intrinsic) proteins in the lipid bilayer?
What is the function of integral (intrinsic) proteins in the lipid bilayer?
Which component of the cell membrane is responsible for filling gaps between the hydrophobic fatty acid tails and modulating membrane fluidity?
Which component of the cell membrane is responsible for filling gaps between the hydrophobic fatty acid tails and modulating membrane fluidity?
Which organelle is responsible for intracytoplasmic digestion?
Which organelle is responsible for intracytoplasmic digestion?
What is the function of the inner membrane of mitochondria?
What is the function of the inner membrane of mitochondria?
Which organelle contains oxidases that synthesize hydrogen peroxide?
Which organelle contains oxidases that synthesize hydrogen peroxide?
Where are the newly synthesized proteins isolated and segregated within the cell?
Where are the newly synthesized proteins isolated and segregated within the cell?
Which type of lysosome contains undigested material?
Which type of lysosome contains undigested material?
Study Notes
Cell Membrane Structure and Function
- Sugar chains located on the outer surface of the plasma membrane serve as identification markers for the cell and help in cell-cell recognition and communication.
- Transmembrane proteins in the cell membrane allow for the transport of small polar molecules like glucose and ions, and facilitate the Na/K pump function.
Organelle Functions
- The Golgi apparatus is responsible for carrying out the function of transporting small polar molecules like glucose and ions.
- Lysosomes are responsible for intracytoplasmic digestion, breaking down and recycling cellular waste and foreign substances.
- Mitochondria's inner membrane is the site of cellular respiration, where energy from glucose is converted into ATP.
- Peroxisomes are the organelle that contains oxidases that synthesize hydrogen peroxide, which is used to break down fatty acids and amino acids.
Protein Synthesis and Lysosomes
- The rough endoplasmic reticulum (RER) is where newly synthesized proteins are isolated and segregated within the cell.
- Heterolysosomes are the type of lysosomes that contain undigested material, formed by the fusion of lysosomes with vesicles containing engulfed foreign substances or cellular waste.
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Description
Prepare for the histology final exam with this revision quiz covering the lipid, protein, and carbohydrate components of the cell membrane. Test your knowledge on phospholipid bilayers, cholesterol, integral proteins, and more.
