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Organisation of the Organism

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

Cell structure and organisation

Subtopic

Cell structure and organisation under Organisation of the Organism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    What is the primary function of the large permanent vacuole in a mature plant cell?

    A.

    To store genetic material

    B.

    To control all cellular activities

    C.

    To provide sites for protein synthesis

    D.

    To maintain turgor pressure against the cell wall

  2. 2.

    In the following sequence representing biological organization, what level is represented by the label 'L3'?

    A.

    Organism

    B.

    Organ

    C.

    Tissue

    D.

    Organelle

  3. 3.

    Which of these structures is found in a palisade mesophyll cell but NOT in a human liver cell?

    A.

    Cytoplasm

    B.

    Cell membrane

    C.

    Cellulose cell wall

    D.

    Nucleus

Download the worksheet for Organisation of the Organism - Cell structure and organisation to practice offline. It includes additional chapter-level practice questions.

Levels of organisation

Subtopic

Levels of organisation under Organisation of the Organism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    A ciliated cell is an example of which level of organization?

    A.

    Organ system

    B.

    Tissue

    C.

    Organ

    D.

    Cell

  2. 2.

    Identify the correct order of levels of organization from the simplest to the most complex.

    A.

    Cell →\rightarrow Tissue →\rightarrow Organ →\rightarrow Organ System

    B.

    Organ →\rightarrow Tissue →\rightarrow Cell →\rightarrow Organ System

    C.

    Cell →\rightarrow Organ →\rightarrow Tissue →\rightarrow Organ System

    D.

    Tissue →\rightarrow Cell →\rightarrow Organ System →\rightarrow Organ

  3. 3.

    Which of these biological structures is classified as a plant organ?

    A.

    Palisade mesophyll cell

    B.

    Chloroplast

    C.

    Leaf

    D.

    Xylem vessel

Download the worksheet for Organisation of the Organism - Levels of organisation to practice offline. It includes additional chapter-level practice questions.

Size of specimens (Magnification)

Subtopic

Size of specimens (Magnification) under Organisation of the Organism for Grade 12 IGCSE.

About Topic & Revision

Preview questions (no answers)

  1. 1.

    When observing very small sub-cellular structures like ribosomes using an electron microscope, which unit is most appropriate for recording their actual size?

    A.

    Meters (mm)

    B.

    Millimeters (mmmm)

    C.

    Micrometers (mum\\mu m)

    D.

    Nanometers (nmnm)

  2. 2.

    A cell has an actual length of 0.02 mm0.02\ mm. If the image of the cell in a textbook measures 2 mm2\ mm, what is the magnification used?

    A.

    times10\\times 10

    B.

    times100\\times 100

    C.

    times50\\times 50

    D.

    times200\\times 200

  3. 3.

    A student measures a specimen using a ruler and finds it is 4.5 mm4.5\ mm long. How many micrometers (mum\\mu m) is this equal to?

    A.

    45 mum45\ \\mu m

    B.

    450 mum450\ \\mu m

    C.

    0.0045 mum0.0045\ \\mu m

    D.

    4,500 mum4,500\ \\mu m

Download the worksheet for Organisation of the Organism - Size of specimens (Magnification) to practice offline. It includes additional chapter-level practice questions.

Organisation of the Organism - Grade 12 Biology (IGCSE) | Krit.club