Cell Organelles and Cytosol Quiz
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Questions and Answers

Which lipid molecule makes up about 75% of the membrane lipids?

  • Sphingolipids
  • Cholesterol
  • Glycolipids
  • Phospholipids (correct)
  • What is the classification of membrane proteins based on their embedding in the lipid bilayer?

  • Transmembrane or monolayer
  • Integral or peripheral (correct)
  • Unipolar or bipolar
  • Hydrophobic or hydrophilic
  • What is the predominant type of membrane protein that spans the entire lipid bilayer?

  • Transmembrane proteins (correct)
  • Glycoproteins
  • Transporters
  • Peripheral proteins
  • Which type of membrane proteins are not as firmly embedded in the membrane?

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

    What do some integral proteins function as, forming pores that allow specific ions to flow through?

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

    What do carriers, also known as transporters, selectively move across the membrane?

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

    Which organelle is responsible for catalyzing glycolysis within the cytosol?

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

    What is the primary function of microfilaments in the cytoskeleton?

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

    Which component is NOT typically found in the cytosol of a cell?

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

    What is the approximate percentage of water in the cytosol?

    <p>75% (D)</p> Signup and view all the answers

    In terms of diameter, which cytoskeletal element is the thinnest?

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

    Which organelle is NOT directly involved in protein synthesis?

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

    Which part of the cell is responsible for forming the cell's flexible outer surface?

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

    In the analogy presented, what does an organ correspond to?

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

    What is the main function of the digestive system?

    <p>Breaking down and absorbing food (B)</p> Signup and view all the answers

    Which type of tissue is responsible for communication and coordination in the body?

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

    What does a system in the human body consist of?

    <p>Organs with common functions (B)</p> Signup and view all the answers

    What is the structural framework of the plasma membrane called?

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

    What is the main function of the Golgi complex?

    <p>Forming secretory vesicles for exocytosis (B)</p> Signup and view all the answers

    How are the cisternae of the Golgi complex described?

    <p>As flattened membranous sacs with bulging edges (C)</p> Signup and view all the answers

    What is the role of mitochondria in apoptosis?

    <p>They release chemicals like cytochrome c during cell death (D)</p> Signup and view all the answers

    Which organelle is often referred to as the 'powerhouse' of the cell?

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

    How do mitochondria respond to stimuli like DNA damage or growth factor deprivation?

    <p>By releasing chemicals like cytochrome c into the cytosol (B)</p> Signup and view all the answers

    What is the primary function of the transport vesicles formed by the Golgi complex?

    <p>Carrying molecules to other organelles like lysosomes (A)</p> Signup and view all the answers

    What initiates the cascade of activation of protein-digesting enzymes that bring about apoptosis in the cytosol?

    <p>Cytochrome c (D)</p> Signup and view all the answers

    What is the function of the nuclear pores in the nuclear envelope?

    <p>Control movement of substances between the nucleus and cytoplasm (B)</p> Signup and view all the answers

    Which structure is continuous with the outer membrane of the nuclear envelope?

    <p>Rough ER (D)</p> Signup and view all the answers

    How do small molecules and ions move through the nuclear pores?

    <p>Passively by diffusion (C)</p> Signup and view all the answers

    Which type of cells have multiple nuclei?

    <p>Skeletal muscle cells (C)</p> Signup and view all the answers

    What structure separates the nucleus from the cytoplasm?

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

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