Endocytosis and Exocytosis

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Questions and Answers

What is the process of internalising various liquids and small particles known as?

  • Exocytosis
  • Endocytosis
  • Phagocytosis
  • Pinocytosis (correct)

Which process involves the formation of large vesicles called phagosomes?

  • Phagocytosis (correct)
  • Endocytosis
  • Pinocytosis
  • Exocytosis

What type of cells ingest large particles by phagocytosis?

  • Only animal cells
  • Only specialised phagocytic cells (correct)
  • All cells
  • Only plant cells

What is the process that is the reverse of endocytosis?

<p>Exocytosis (C)</p> Signup and view all the answers

Which process involves molecules being packaged into membrane-bound vesicles?

<p>Exocytosis (A)</p> Signup and view all the answers

What do endosomes refer to in the context of cellular processes?

<p>Intracellular vesicles formed during pinocytosis (D)</p> Signup and view all the answers

Which process involves membrane protrusions surrounding large particles?

<p>Phagocytosis (A)</p> Signup and view all the answers

'Cell drinking' is another term used to describe which cellular process?

<p>Pinocytosis (C)</p> Signup and view all the answers

'Cell eating' is a term associated with which cellular process?

<p>Phagocytosis (B)</p> Signup and view all the answers

Which type of cells ingest large particles by forming large vesicles called phagosomes?

<p>All specialised phagocytic cells (C)</p> Signup and view all the answers

What is the main characteristic of clathrin-mediated endocytosis?

<p>Involves the formation of a complex of proteins (B)</p> Signup and view all the answers

What is the function of adaptor proteins in clathrin-mediated endocytosis?

<p>Bind the clathrin coat to cargo receptor cytoplasmic sites (D)</p> Signup and view all the answers

What is the role of Dynamin in clathrin-mediated endocytosis?

<p>Causes vesicle release by forming a ring around the neck (C)</p> Signup and view all the answers

What is the fate of clathrin triskelions and adaptors after vesicle release?

<p>They are recycled back to the membrane (B)</p> Signup and view all the answers

Which protein forms the curvature of coated pits during clathrin-mediated endocytosis?

<p>Clathrin triskelions (B)</p> Signup and view all the answers

What initiates the formation of coated vesicles in clathrin-mediated endocytosis?

<p>Activation of PIP2 via DAG (A)</p> Signup and view all the answers

How do adaptor proteins interact with cargo receptors in clathrin-mediated endocytosis?

<p>Recognize amino acid sequences on membrane receptors (A)</p> Signup and view all the answers

What is the structural arrangement of a molecule of clathrin referred to as?

<p>Triskelion (C)</p> Signup and view all the answers

What is the function of Dynamin in clathrin-mediated endocytosis?

<p>Causes vesicle release by pinching off the neck (C)</p> Signup and view all the answers

What triggers the deepening of coated pits during clathrin-mediated endocytosis?

<p>Extracellular fluid encapsulation by membranes (C)</p> Signup and view all the answers

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