Prokaryotic Cells Quiz

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Prokaryotic Cells Quiz - Quiz

Welcome to this unique "Prokaryotic Cells Quiz" that is going to test your knowledge about prokaryotic cells. Prokaryotic cells are unicellular organisms that lack a membrane-bound nucleus, mitochondria, or any other membrane-bound organelle. They are divided into two domains; Archaea and Bacteria. What do you know about this particular organism? Let's find out with this amazing quiz right here right now. We wish you all the
best to you. Have fun!


Questions and Answers
  • 1. 

    Which structure is found in all prokaryotic cells?

    • A.

      Flagella

    • B.

      Ribosomes

    • C.

      Mitochondria

    • D.

      Vacuoles

    Correct Answer
    B. Ribosomes
    Explanation
    Ribosomes are found in all prokaryotic cells. Prokaryotes are single-celled organisms that lack a nucleus and other membrane-bound organelles. Ribosomes are responsible for protein synthesis in cells, and they are essential for the survival and functioning of all living organisms. Therefore, ribosomes are present in prokaryotic cells to carry out protein synthesis and maintain the cellular processes necessary for their survival.

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  • 2. 

    Which characteristic applies to all prokaryotic cells?

    • A.

      They have nucleus

    • B.

      They have mitochondria

    • C.

      They have chlorophyll

    • D.

      They have ribosomes

    Correct Answer
    D. They have ribosomes
    Explanation
    All prokaryotic cells have ribosomes. Ribosomes are cellular structures responsible for protein synthesis. They can be found in all types of cells, including prokaryotic cells, which lack a true nucleus. Prokaryotic cells do not have a membrane-bound nucleus like eukaryotic cells, but they still carry out essential cellular functions, including protein synthesis, with the help of ribosomes. Therefore, the presence of ribosomes is a characteristic that applies to all prokaryotic cells.

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  • 3. 

    Prokaryotes are organisms made up of cells that lack a cell ______.

    • A.

      Nucleus

    • B.

      Cell wall

    • C.

      Slime layer made of polysaccharide

    • D.

      None of these

    Correct Answer
    A. Nucleus
    Explanation
    Prokaryotes are organisms made up of cells that lack a cell nucleus. This means that their genetic material is not enclosed within a membrane-bound nucleus like in eukaryotic cells. Prokaryotic cells have their DNA floating freely in the cytoplasm. Therefore, the correct answer is "nucleus."

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  • 4. 

    Prokaryotes cells

    • A.

      Are found in amphibians only

    • B.

      Are found in reptiles only

    • C.

      Are found in mammals only

    • D.

      None of these is true.

    Correct Answer
    D. None of these is true.
    Explanation
    The given answer states that none of the options are true. This means that prokaryote cells are not found exclusively in amphibians, reptiles, or mammals. Prokaryotes are single-celled organisms that lack a nucleus and membrane-bound organelles. They can be found in various environments, including soil, water, and the bodies of both plants and animals. Therefore, they are not limited to any specific group of animals such as amphibians, reptiles, or mammals.

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  • 5. 

    Plasma membrane

    • A.

      Regenerates the cell.

    • B.

      Links the cell's interior to its surrounding environment.

    • C.

      Separates the cell's interior from its surrounding environment.

    • D.

      None of these

    Correct Answer
    C. Separates the cell's interior from its surrounding environment.
    Explanation
    The plasma membrane is a selectively permeable barrier that separates the cell's interior from its surrounding environment. It controls the movement of substances in and out of the cell, allowing essential nutrients to enter and waste products to exit. This separation is crucial for maintaining the cell's internal environment and ensuring its proper functioning.

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  • 6. 

    Which of these cell features is absent in bacterial cells?

    • A.

      Plasma membrane

    • B.

      DNA

    • C.

      Nucleoid

    • D.

      Nucleus

    Correct Answer
    D. Nucleus
    Explanation
    Bacterial cells do not have a nucleus. The genetic material in bacterial cells is present in a region called the nucleoid, which is not surrounded by a membrane. Bacterial cells also lack other membrane-bound organelles found in eukaryotic cells, such as the mitochondria or endoplasmic reticulum. Instead, they have a plasma membrane that encloses the cytoplasm and regulates the movement of substances in and out of the cell.

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  • 7. 

    Which prokaryotic cell is correctly matched with its morphology (shape)?

    • A.

      Spirillum is spherical

    • B.

      Bacillus is spherical

    • C.

      Coccus has one or more twists like a spiral

    • D.

      Bacillus is shaped like a small rod or staff

    Correct Answer
    D. Bacillus is shaped like a small rod or staff
    Explanation
    The correct answer is bacillus is shaped like a small rod or staff. A bacillus is a type of prokaryotic cell that has a rod-like or cylindrical shape. This shape is often compared to a small rod or staff, hence the name bacillus. It is important to note that a bacillus is not spherical, as mentioned in the other options. A spherical prokaryotic cell is known as a coccus. A spirillum, on the other hand, has a spiral shape and is not spherical.

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  • 8. 

    The cell wall of bacteria is _____.

    • A.

      Made of cellulose

    • B.

      Made of peptidoglycan

    • C.

      Inside the plasma membrane

    • D.

      Present in all bacterial species

    Correct Answer
    B. Made of peptidoglycan
    Explanation
    The cell wall of bacteria is made of peptidoglycan. Peptidoglycan is a polymer composed of sugars and amino acids that provides structural support to the bacterial cell. It forms a mesh-like network outside the plasma membrane, giving bacteria their characteristic shape and protecting them from osmotic pressure. While some bacteria may have additional layers or components in their cell wall, peptidoglycan is a common feature in most bacterial species.

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  • 9. 

    Gram staining _____.

    • A.

      turns Gram-positive species pink

    • B.

      Turns Gram-negative species purple

    • C.

      Turns Gram-positive species purple

    • D.

      Requires three steps: exposure of the bacteria to purple dye, then iodine, and finally, an alcohol wash

    Correct Answer
    C. Turns Gram-positive species purple
    Explanation
    Gram staining is a technique used to differentiate bacteria into two groups: Gram-positive and Gram-negative. The staining process involves multiple steps, including the exposure of bacteria to a purple dye, followed by iodine and an alcohol wash. Gram-positive species retain the purple dye and appear purple under a microscope, while Gram-negative species do not retain the dye and are counterstained with a pink dye. Therefore, the correct answer is that Gram staining turns Gram-positive species purple.

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  • 10. 

    Photoheterotrophic prokaryotes _____.

    • A.

      Get energy from the sun and use organic compounds as their carbon source

    • B.

      Get nutrients from a living host

    • C.

      Get carbon from carbon dioxide, and energy from oxidizing compounds such as iron or sulfur

    • D.

      Are self-feeders who make their own food by photosynthesis

    Correct Answer
    A. Get energy from the sun and use organic compounds as their carbon source
    Explanation
    Photoheterotrophic prokaryotes are organisms that obtain energy from sunlight and use organic compounds as their source of carbon. Unlike photoautotrophs, which can produce their own organic compounds through photosynthesis, photoheterotrophs rely on external sources for their carbon needs. They are able to convert light energy into chemical energy through various metabolic pathways, such as aerobic or anaerobic respiration. By utilizing organic compounds as their carbon source, photoheterotrophic prokaryotes can obtain the necessary building blocks for growth and reproduction.

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