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Questions and Answers

What is the primary function of the Golgi apparatus?

  • Synthesis of lipids
  • Storage of carbohydrates
  • Modification, packaging, and sorting of proteins (correct)
  • Detoxification of drugs
  • Which of the following organelles is primarily involved in digestion within the cell?

  • Mitochondria
  • Endoplasmic reticulum
  • Lysosomes (correct)
  • Golgi apparatus
  • Which condition is associated with a mutation in genes for lysosomal enzymes?

  • Diabetes
  • Cystic fibrosis
  • Alzheimer's
  • Tay-Sachs disease (correct)
  • What function is not attributed to peroxisomes?

    <p>Protein synthesis</p> Signup and view all the answers

    How do lysosomes contribute to the function of endocytosed vesicles?

    <p>By digesting their contents</p> Signup and view all the answers

    Which statement about the Golgi apparatus is incorrect?

    <p>It is responsible for energy production.</p> Signup and view all the answers

    What is the consequence of nonfunctioning lysosomes in a cell?

    <p>Accumulation of incompletely digested molecules</p> Signup and view all the answers

    What is the primary characteristic of integral proteins in the phospholipid bilayer?

    <p>They penetrate and extend across the hydrophobic interior.</p> Signup and view all the answers

    Which function is NOT associated with the metabolic processes in diverse types of cells?

    <p>Transport of nutrients only</p> Signup and view all the answers

    Which function is NOT associated with membrane proteins?

    <p>Storing genetic information.</p> Signup and view all the answers

    How do transport proteins regulate the movement of substances?

    <p>Using channels, carriers, and pumps.</p> Signup and view all the answers

    What role do cell surface receptors play in cellular communication?

    <p>They bind with ligands to transmit signals.</p> Signup and view all the answers

    What is the function of identity markers on the cell membrane?

    <p>To distinguish between foreign and self-cells.</p> Signup and view all the answers

    What is the primary function of the plasma membrane?

    <p>To separate the internal contents from the external environment</p> Signup and view all the answers

    Which of the following correctly describes the cytosol?

    <p>It is a viscous fluid with high water content.</p> Signup and view all the answers

    Which category of organelles is characterized by being enclosed by a membrane?

    <p>Membrane-bound organelles</p> Signup and view all the answers

    Which of the following is NOT considered an organelle?

    <p>Glycogen</p> Signup and view all the answers

    What is found in the nucleus of a cell?

    <p>Genetic material (DNA)</p> Signup and view all the answers

    What distinguishes non-membrane-bound organelles from membrane-bound organelles?

    <p>They are composed of protein and not enclosed in a membrane.</p> Signup and view all the answers

    What is the role of inclusions in the cytosol?

    <p>They store materials temporarily.</p> Signup and view all the answers

    Which structure contains nucleoplasm?

    <p>Nucleus</p> Signup and view all the answers

    What characterizes passive processes of membrane transport?

    <p>They do not require energy and depend on concentration gradients.</p> Signup and view all the answers

    Which of the following affects the rate of diffusion?

    <p>The steepness of the concentration gradient.</p> Signup and view all the answers

    What is the definition of simple diffusion?

    <p>A process not regulated by the plasma membrane involving small and nonpolar solutes.</p> Signup and view all the answers

    What must occur for active transport to take place?

    <p>Energy must be expended to move substances against their concentration gradient.</p> Signup and view all the answers

    Which of the following is NOT a characteristic of osmosis?

    <p>It requires energy input.</p> Signup and view all the answers

    What role does temperature play in the process of diffusion?

    <p>Higher temperatures increase the kinetic energy, leading to faster diffusion.</p> Signup and view all the answers

    What type of substances typically undergo simple diffusion?

    <p>Small nonpolar solutes.</p> Signup and view all the answers

    What is required for vesicular transport to occur?

    <p>Energy to release membrane-bound vesicles.</p> Signup and view all the answers

    What is the primary function of tight junctions in cells?

    <p>To prevent substances from passing between cells</p> Signup and view all the answers

    Which structure is responsible for anchoring the basal layer of epidermis cells to underlying components?

    <p>Hemidesmosomes</p> Signup and view all the answers

    What is the role of connexons in gap junctions?

    <p>To form pores between cells</p> Signup and view all the answers

    Which component is not part of the nucleus?

    <p>Cytosol</p> Signup and view all the answers

    What is the primary function of the nucleolus?

    <p>To produce ribosome subunits</p> Signup and view all the answers

    Which type of cell is most likely to have multiple nucleoli?

    <p>Nerve cells</p> Signup and view all the answers

    What characterizes the nuclear envelope?

    <p>It encloses the nucleus with a double membrane</p> Signup and view all the answers

    What is the significance of the nuclear pores?

    <p>They allow large molecules to move into and out of the nucleus</p> Signup and view all the answers

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