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IBBiology: SLDPExam Questions1. Cell Biology1.2 Cells: Origin & Ultrastructure

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First teaching 2014

Last exams 2024

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Cells: Origin & Ultrastructure (DP IB Biology: SL)

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1.2 Cells: Origin & Ultrastructure

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1.2 Cells: Origin & Ultrastructure

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11 mark

Which row correctly compares the magnification and resolution of an electron microscope with a light microscope?

  Magnification Resolution
A. Lower Higher
B. Higher Lower
C. Higher Higher
D. Lower Lower

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    21 mark

    The diagram shows a type of prokaryotic cell, a bacterium.

    1-2-e-q2-paper-1

    Which three structures are found in both an animal cell and this bacterium cell?

    • cell membrane, cell wall and DNA

    • cell membrane, DNA and ribosome

    • capsule, DNA and ribosome

    • capsule, cell membrane and cell wall

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    31 mark

    Which of the following can not be viewed using a light microscope?

    • Nucleus

    • Cell wall

    • Chloroplasts

    • Ribosomes

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    41 mark

    The image below shows an electron micrograph of a specialised cell. e-4

    Based on the image, which of the following would correctly identify the function of this specialised cell?

    • This is a cell found in a gland that secretes enzymes for digestion.

    • This is a cell that carries out photosynthesis in the leaf of a plant.

    • This is a cell that transports oxygen around the body in the blood.

    • This is a cell that absorbs nutrients from digested food and transports them into the food in the small intestine.

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    51 mark

    Which of the following correctly identifies the process that allows prokaryotic cells to reproduce?

    • Mitosis

    • Binary fission

    • Fertilisation

    • Meiosis

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    11 mark

    Which of the following is not a correct description of a light microscope or an electron microscope?

    • An electron microscope can resolve specimens as small as 0.5 nm in diameter.

    • A light microscope has a maximum resolution of 0.2 µm.

    • An electron microscope has a maximum resolution of 0.05 nm.

    • A light microscope can resolve specimens as small as 200 nm in diameter.

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    21 mark

    The table shows some possible units for measuring the diameters of alveoli, white blood cells and the width of cell walls.

    Which of the rows show the most suitable units for measuring each of these structures?

      Diameter of alveoli Diameter of white blood cells Width of cell walls
    A mm µm µm
    B mm µm nm
    C µm nm µm
    D µm µm nm

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      31 mark

      The list below contains structures that are all features of eukaryotic cells.

      1. Nucleus
      2. Endoplasmic reticulum
      3. Lysosome
      4. Chloroplast
      5. Mitochondrion

      Which of these structures will have a double membrane?

      • I, II and III

      • I, III and IV

      • I, IV and V

      • II, III and IV

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      41 mark

      The electron micrograph below shows a section of part of a palisade mesophyll cell.q1-1-2-cells-origin-medium-ib-hl-biology

      Which structure controls the exchange of substances into and out of the cell?

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        51 mark

        Which set of observations would indicate that a student is observing a eukaryotic cell?

          Cytoplasm includes endoplasmic reticulum Protein molecules are associated with the DNA Diameter <1 µm
        A X ✓ X
        B X X ✓
        C ✓ ✓ X
        D ✓ X X

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          61 mark

          Membrane-bound sacs containing products of metabolism are produced by the endoplasmic reticulum.

          Where are these products used?

          • Inside lysosomes only.

          • Outside the cell only.

          • Inside the cell only.

          • Inside and outside the cell.

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          71 mark

          The diagram shows a typical plant cell.q7-1-2-cells-origin-medium-ib-hl-biology

          Which of the cell components would be present in prokaryotes?

          • I only

          • II only

          • II and III

          • I and IV

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          81 mark

          The following statement describes some of Louis Pasteur’s findings:

          Broth was first boiled, killing all organisms in it. The broth was then transferred to a swan-necked flask, which prevented organisms from entering. The result was that no organism subsequently grew in the broth. The swan-necked flask was then broken. The result was that mould subsequently grew in the broth.


          What did these findings suggest?

          • Mould needs nutrients in order to grow.

          • Aerobic respiration requires the presence of oxygen.

          • Mould is a form of microorganism.

          • Spontaneous generation of cells does not occur.

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          91 mark

          Which of the following is evidence for the endosymbiotic theory?

          • 70S ribosomes can be found in prokaryotic cells.

          • Mitochondria contain their own DNA.

          • Meteorites have been found that contain organic molecules.

          • In certain cases, gene transfer from prokaryotic cells to eukaryotic cells via plasmids has been found to occur.

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          101 mark

          Which process is occurring in the diagram below?q10-1-2-cells-origin-medium-ib-hl-biology

          • Binary fission

          • Cytokinesis

          • Mitosis

          • Meiosis

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          11 mark

          A giant bacterium, Epulopiscium fishelsoni was discovered in 1985.


          Which cell structure(s) would enable biologists to classify Epulopiscium as prokaryotic?

          • Circular DNA and 70S ribosomes occurring freely in the cytoplasm and a cell wall made of murein.

          • A pair of centrioles close to the nuclear pore with 70S and 80S ribosomes occurring freely in the cytoplasm.

          • Smooth endoplasmic reticulum throughout the cytoplasm and a cell wall made of murein.

          • A cellulose cell wall outside the plasma membrane with 70S ribosomes and circular DNA occurring freely in the cytoplasm.

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          21 mark

          A cell which is actively growing is supplied with radioactive amino acids.

          Which cell component will show an increase in radioactivity first?

          • Mitochondria

          • Golgi apparatus

          • Rough endoplasmic reticulum

          • Nucleus

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          31 mark

          The image below is an electron micrograph of part of an animal cell.

          Which of the following options (A to D) would be the site of protein modification and packaging?

          h-3

           

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            4
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            In the 19th century Louis Pasteur carried out an experiment that disproved a popular theory at the time. 

            What was that theory?

            • That new traits in organisms evolve due to changes that occur during the organisms lifetime

            • That new organisms can appear spontaneously from non-living matter

            • That mitochondria came about due to a process of endosymbiosis

            • That traits are inherited by the passing down of proteins from parents to offspring

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            51 mark

            The role of exocrine gland cells in the pancreas is to secrete digestive enzymes into the pancreatic duct. 

            Which of the following organelles does not directly help it to achieve this task? 

            • Rough endoplasmic reticulum

            • Golgi apparatus

            • Lysosomes

            • Mitochondria

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