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Lectins quiz

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  • What is the sugar code in cellular biology?
    The sugar code refers to cells using carbohydrates to encode biological information, leading to different cellular events.
  • What are the 'letters' and 'words' of the sugar code?
    Monosaccharides are the 'letters' and oligosaccharides are the 'words' of the sugar code.
  • How do oligosaccharides contribute to cellular diversity?
    Oligosaccharides can be combined in various ways, creating diverse glycoproteins with distinct functions.
  • What is a glycoprotein?
    A glycoprotein is a protein linked to oligosaccharides, which can encode different biological meanings and functions.
  • How can the arrangement of monosaccharides affect protein function?
    Different arrangements of monosaccharides in oligosaccharides can lead to proteins having different lifespans or functions.
  • What are lectins?
    Lectins are proteins that bind specific carbohydrates with high affinity and specificity.
  • What types of biological functions do lectins mediate?
    Lectins mediate functions such as cell adhesion, signaling, recognition, and intracellular localization.
  • How do lectin-carbohydrate interactions compare to protein-ligand interactions?
    Lectin-carbohydrate interactions are protein-ligand interactions, involving reversible, non-covalent binding.
  • What is the nature of the bond between lectins and carbohydrates?
    Lectins bind carbohydrates through reversible, non-covalent interactions.
  • What role do lectins play in the sugar code?
    Lectins act as translators of the sugar code, binding specific carbohydrates to trigger cellular events.
  • What are integrins?
    Integrins are plasma membrane lectins that mediate signals between the cell and the extracellular matrix (ECM).
  • What is the function of selectins?
    Selectins are plasma membrane lectins that mediate cell-to-cell recognition and adhesion.
  • How do integrins and selectins differ in their interactions?
    Integrins interact with the extracellular matrix, while selectins facilitate communication between neighboring cells.
  • What structural feature can integrins possess?
    Integrins can have quaternary protein structure, consisting of multiple subunits.
  • Why are integrins and selectins important in the fluid mosaic model?
    They are critical for cellular signaling and adhesion, enabling communication within and between cells in the membrane.