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    Study Guide3 Learning Acts Sci123 2023 For Merge

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    Rovic Gasmen
    The document provides information on the differences between prokaryotic and eukaryotic cells as well as Gram-positive and Gram-negative bacteria. Specifically, it outlines that prokaryotic cells are typically smaller, lack a nucleus and membrane-bound organelles, have a single circular chromosome, and divide through binary fission. In contrast, eukaryotic cells are generally larger, have a nucleus and various membrane-bound organelles, have multiple linear chromosomes, and divide through mitosis. It also notes the key distinguishing characteristics of Gram-positive and Gram-negative bacteria such as their Gram staining reactions, peptidoglycan layer thickness, outer membrane presence, and toxin production tendencies.

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    Study Guide3 Learning Acts Sci123 2023 For Merge

    Uploaded by

    Rovic Gasmen
    11 views2 pages
    The document provides information on the differences between prokaryotic and eukaryotic cells as well as Gram-positive and Gram-negative bacteria. Specifically, it outlines that prokaryotic cells are typically smaller, lack a nucleus and membrane-bound organelles, have a single circular chromosome, and divide through binary fission. In contrast, eukaryotic cells are generally larger, have a nucleus and various membrane-bound organelles, have multiple linear chromosomes, and divide through mitosis. It also notes the key distinguishing characteristics of Gram-positive and Gram-negative bacteria such as their Gram staining reactions, peptidoglycan layer thickness, outer membrane presence, and toxin production tendencies.

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    Study Guide3 Learning Acts Sci123 2023 for Merge

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    The document provides information on the differences between prokaryotic and eukaryotic cells as well as Gram-positive and Gram-negative bacteria. Specifically, it outlines that prokaryotic cells are typically smaller, lack a nucleus and membrane-bound organelles, have a single circular chromosome, and divide through binary fission. In contrast, eukaryotic cells are generally larger, have a nucleus and various membrane-bound organelles, have multiple linear chromosomes, and divide through mitosis. It also notes the key distinguishing characteristics of Gram-positive and Gram-negative bacteria such as their Gram staining reactions, peptidoglycan layer thickness, outer membrane presence, and toxin production tendencies.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    11 views2 pages

    Study Guide3 Learning Acts Sci123 2023 For Merge

    Uploaded by

    Rovic Gasmen
    The document provides information on the differences between prokaryotic and eukaryotic cells as well as Gram-positive and Gram-negative bacteria. Specifically, it outlines that prokaryotic cells are typically smaller, lack a nucleus and membrane-bound organelles, have a single circular chromosome, and divide through binary fission. In contrast, eukaryotic cells are generally larger, have a nucleus and various membrane-bound organelles, have multiple linear chromosomes, and divide through mitosis. It also notes the key distinguishing characteristics of Gram-positive and Gram-negative bacteria such as their Gram staining reactions, peptidoglycan layer thickness, outer membrane presence, and toxin production tendencies.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    ROVIC C.

    GASMEN
    BSN 1-4

    Study Guide 3 – Learning Activities (Sci123)


    CELL STRUCTURE AND TAXONOMY

    Study Guide 3 - Learning Activity 1:

    Provide information in the following table showing the principal differences between
    prokaryotic and eukaryotic cells:

    Characteristics Prokaryotic Eukaryotic


    Size of Cell 0.1μm to 5.0μm in 10.0μm to 100.0μm in
    diameter diameter
    (but typically: 0.2-2.0 μm
    in diameter)
    Nucleus ABSENT PRESENT
    (But has nucleoid region)

    Membrane-Enclosed Organelles ABSENT PRESENT; ORGANELLES


    LIKE:
    • Nucleus
    • Ribosomes
    • endoplasmic reticulum
    • Golgi apparatus
    • Vacuoles
    • Lysosomes
    • Mitochondria
    • In plants, chloroplasts
    Flagella YES, consists of two YES, complex; consists of
    protein building blocks multiple microtubules
    Glycocalyx YES YES
    Cell Wall Yes... In some, • In plants, Cellulose.
    Peptidoglycan. • In Fungus, glucans, chitin
    and glycoproteins.
    Ribosomes YES YES
    Chromosome
    YES, HAS ONE BUT NOT YES, HAS MORE THAN ONE
    TRUE CHROMOSOME
    (Plasmids and free-
    floating)

    Cell Division BINARY FISSION MITOSIS


    Sexual Recombination NO MEIOSIS; transfer of INVOLVES MEIOSIS
    DNA fragments only
    (CONJUGATION)
    ROVIC C. GASMEN
    BSN 1-4

    Study Guide 3 - Learning Activity 2:

    Fill-up the needed data in the following table showing the comparative characteristics of
    Gram-Positive and Gram Negative Bacteria:

    Characteristics Gram-Positive Gram-Negative


    Gram Reactions Retain Crystal Violet dye Can be decolorized to
    and stain dark violet or accept counterstain
    purple (safranin) and stain red
    Peptidoglycan Layer Thick – multilayered Thin – single-layered
    Teichoic Acids Mostly present Absent
    Outer Membrane Absent Present
    Lipopolysaccharide (LPS) Content Virtually none High content
    Flagellar Structure 2 rings in basal bodies 4 rings in basal bodies
    Toxins Produced Exotoxins (primarily) Endotoxins (Primarily)
    Resistance to Physical Disruption High Low
    Susceptibility to Penicillin and Affected to antibiotics Has high resistance to
    Sulfonamide (susceptible) antibiotics (non-
    susceptible)
    Resistance to Drying High Low

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