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Questions and Answers
What is the term for a carbohydrate chain in the plasma membrane?
What is the term for a carbohydrate chain in the plasma membrane?
- Carbohydrate Chain (correct)
- Phospholipid Bilayer
- Peripheral Protein
- Glycoprotein
What is a Peripheral Protein?
What is a Peripheral Protein?
A protein that is attached to the membrane surface but not embedded within it.
What is a Phospholipid Bilayer?
What is a Phospholipid Bilayer?
A double layer of phospholipids that makes up the plasma membrane.
What are Cytoskeleton Filaments?
What are Cytoskeleton Filaments?
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What is the function of a Glycoprotein?
What is the function of a Glycoprotein?
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Study Notes
Carbohydrate Chain
- Composed of monosaccharides, attached to proteins or lipids on the extracellular surface of the plasma membrane.
- Plays a crucial role in cell recognition, signaling, and adhesion.
- Contributes to the formation of the glycocalyx, a protective and sticky outer layer around the cell.
Peripheral Protein
- Loosely attached to the exterior or interior surfaces of the membrane, not embedded within the lipid bilayer.
- Involved in various functions such as signaling, maintaining cell shape, and anchoring the cytoskeleton.
- Can be enzymes, structural proteins, or involved in the transport of substances.
Phospholipid Bilayer
- Fundamental structure of the plasma membrane, consisting of two layers of phospholipids.
- Hydrophilic (water-attracting) heads face outward towards the aqueous environment, while hydrophobic (water-repelling) tails face inward, protecting the interior of the cell.
- Provides a semi-permeable barrier allowing selective entry and exit of substances.
Cytoskeleton Filaments
- Composed of protein filaments such as microfilaments, intermediate filaments, and microtubules.
- Supports cell shape, facilitates cell movement, and organizes the internal contents of the cell.
- Plays a role in cell division and intracellular transport.
Glycoprotein
- A protein that has carbohydrate molecules attached, found on the outer layer of the plasma membrane.
- Functions in recognition and communication between cells and the immune system.
- Helps in forming receptors for hormones and neurotransmitters.
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