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Eukaryotic Cell Structure and Function

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Termini in questo insieme (19)

  • What is the role of internal membranes in eukaryotic cells?

    They create compartments called organelles that allow different metabolic processes to occur simultaneously.

  • What are biological membranes primarily composed of?

    A double layer of phospholipids and other lipids, with proteins embedded or attached to the surfaces.

  • How do membrane compositions vary?

    Each membrane type has a unique composition of lipids and proteins tailored to its specific functions.

  • What is the function of mitochondria membranes?

    They contain enzymes essential for cellular respiration and ATP generation.

  • Describe the nuclear envelope.

    A double membrane enclosing the nucleus, containing pores and continuous with the endoplasmic reticulum.

  • What is the nucleolus responsible for?

    It is involved in ribosome production within the nucleus.

  • What is chromatin composed of and when is it visible as chromosomes?

    Chromatin is made of DNA and proteins, visible as condensed chromosomes during cell division.

  • What are the two regions of the endoplasmic reticulum (ER) and their functions?

    Rough ER has ribosomes and is involved in protein synthesis; Smooth ER is involved in membrane synthesis and other metabolic processes.

  • What is the role of the Golgi apparatus?

    It is involved in the synthesis, modification, sorting, and secretion of cell products.

  • What is the function of lysosomes?

    They digest macromolecules within the cell.

  • What specialized functions do peroxisomes perform?

    They perform specialized metabolic functions and convert hydrogen peroxide to water.

  • Where are ribosomes found and what is their function?

    Ribosomes are free in the cytosol or bound to rough ER or nuclear envelope and are responsible for protein synthesis.

  • What are the components of the cytoskeleton and their roles?

    Microfilaments, intermediate filaments, and microtubules reinforce cell shape and aid in cell movement.

  • What is the centrosome and its function?

    The centrosome contains a pair of centrioles and is the region where microtubules are initiated.

  • What is the plasma membrane's role?

    It encloses the cell, controlling the passage of substances in and out.

  • What are flagella and their composition?

    Flagella are motility structures in some animal cells, composed of microtubules.

  • What is the function of microvilli?

    They increase the cell's surface area to enhance absorption.

  • What additional structures do plant cells have?

    Chloroplasts for photosynthesis, plasmodesmata for cytoplasmic connections, and a cell wall for shape and protection.

  • What is the role of the central vacuole in plant cells?

    It stores substances, breaks down waste, hydrolyzes macromolecules, and its enlargement aids in plant growth.