Cell Cycle And Organelles

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Quizzes Created: 20 | Total Attempts: 87,567
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Cell Cycle And Organelles - Quiz

Quiz on cell cycle and cell organelles


Questions and Answers
  • 1. 

    The stage in the cell cycle during which the cell grows and rests is called....

    • A.

      Prophase

    • B.

      Metaphase

    • C.

      Interphase

    • D.

      Anaphase

    Correct Answer
    C. Interphase
    Explanation
    Interphase is the first stage of the cell cycle. The cell rests, then grows and gets ready to divide again.

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  • 2. 

    Mitosis has four stages during which time the chromosome number is doubled and two new cell nuclei is formed from one. What are these four stages in order?

    • A.

      Prophase, metaphase, anaphase, telophase

    • B.

      Interphase, prophase, anaphase, metaphase

    • C.

      Prophase, metaphase, telophase, interphase

    • D.

      Cytokinesis, metaphase, prophase, interphase

    Correct Answer
    A. Prophase, metaphase, anaphase, telophase
    Explanation
    Interphase and cytokinesis are not part of mitosis. They are the other two stages in the cell cycle, along with mitosis.

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  • 3. 

    What happens to the cell during cytokinesis?

    • A.

      The nucleus divides.

    • B.

      The cytoplasm divides, forming two new cells.

    • C.

      The cell rests and grows.

    • D.

      The chromosomes are doubled.

    Correct Answer
    B. The cytoplasm divides, forming two new cells.
    Explanation
    During cytokinesis, the cytoplasm of the cell divides, resulting in the formation of two new cells. This process is the final stage of cell division, following the separation of the duplicated chromosomes in the nucleus. The division of the cytoplasm ensures that each new cell receives a complete set of organelles and cellular components, allowing them to function independently. Therefore, the correct answer is that the cytoplasm divides, forming two new cells.

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  • 4. 

    During prophase, the chromosomes doubled. The two halves are stuck together in the middle by a centromere. What are the names of these two halves of a doubled chromosome?

    • A.

      Doubleomes

    • B.

      Father chromosomes

    • C.

      Sister chromatids

    • D.

      Spindle fibers

    Correct Answer
    C. Sister chromatids
    Explanation
    During prophase, the chromosomes duplicate and form two identical copies called sister chromatids. These sister chromatids are attached to each other at the centromere, which holds them together until they separate during cell division. The term "doubleomes" is not a scientifically recognized term, "father chromosomes" is not an accurate description of the duplicated chromosomes, and "spindle fibers" are not the names of the two halves of a doubled chromosome. Therefore, the correct answer is sister chromatids.

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  • 5. 

    How many main stages are there in the cell cycle?

    Correct Answer
    three
    3
    Explanation
    There are three: Interphase, mitosis, and cytokinesis

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  • 6. 

    As cells divide, making two from one, they continue to get smaller and smaller.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Cells divide, then the new cells grow back to their original size.

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  • 7. 

    Nearly every cell in your body is different from the cells that were in your body last year.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Cells constantly die and are replaced with new cells through mitosis.

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  • 8. 

    Sister chromatids are pulled apart to opposite sides of the cell by protein strands called....

    • A.

      Centromeres

    • B.

      Spindle fibers

    • C.

      Membranes

    • D.

      Fibroids

    Correct Answer
    B. Spindle fibers
    Explanation
    During cell division, sister chromatids, which are identical copies of each other, need to be separated and pulled to opposite sides of the cell. This process is facilitated by protein strands called spindle fibers. These fibers attach to the centromeres of the sister chromatids and exert force to pull them apart, ensuring that each new cell receives a complete set of chromosomes. Therefore, spindle fibers are responsible for the accurate distribution of genetic material during cell division.

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  • 9. 

    Check all the ones that are stages in mitosis.

    • A.

      Interphase

    • B.

      Prophase

    • C.

      Anaphase

    • D.

      Telophase

    • E.

      Cytokinesis

    • F.

      Metaphase

    Correct Answer(s)
    B. Prophase
    C. Anaphase
    D. Telophase
    F. Metaphase
    Explanation
    The stages in mitosis are: Prophase, Metaphase, Anaphase and Telophase. Cytokinesis is not a stage in mitosis; it is the division of the cytoplasm that occurs at the end of the cell cycle. Interphase is also not a stage in mitosis; it is the phase before mitosis begins where the cell undergoes growth and DNA replication. Interphase is the resting stage of the cell cycle and cytokinesis is when the cytoplasm divides. Mitosis concerns only the nucleus and chromosomes.

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  • 10. 

    What is the main control center of the cell?

    • A.

      Nucleus

    • B.

      Plasma membrane

    • C.

      Mitochondrion

    • D.

      Ribosome

    Correct Answer
    A. Nucleus
    Explanation
    The nucleus is the main control center of the cell. It contains the cell's genetic material, including DNA, which regulates the cell's activities and controls the production of proteins. The nucleus also plays a crucial role in cell division, as it is responsible for the replication and distribution of DNA during mitosis and meiosis. Additionally, the nucleus contains the nucleolus, which is involved in the production of ribosomes. Overall, the nucleus is essential for maintaining the cell's structure, function, and genetic information.

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  • 11. 

    Which cell organelle is the site of protein synthesis?

    • A.

      Ribosome

    • B.

      Mitochondrion

    • C.

      Golgi apparatus

    • D.

      Lysosome

    Correct Answer
    A. Ribosome
    Explanation
    The ribosome is the site of protein synthesis in a cell. It is a small, spherical organelle found in the cytoplasm or attached to the endoplasmic reticulum. Ribosomes are responsible for translating the genetic information from DNA into proteins. They do this by assembling amino acids in the correct order to form a polypeptide chain, which then folds into a functional protein. The ribosome consists of two subunits, a large and a small subunit, that work together to carry out protein synthesis.

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  • 12. 

    This organelle acts as a sort of "traffic cop" that lets certain things in and out of a cell.

    • A.

      Nucleus

    • B.

      Ribosome

    • C.

      Plasma membrane

    • D.

      Cell wall

    Correct Answer
    C. Plasma membrane
    Explanation
    The plasma membrane acts as a "traffic cop" for the cell by regulating the movement of substances in and out of the cell. It is selectively permeable, allowing certain molecules to pass through while preventing others from entering or leaving the cell. This control over the flow of substances is essential for maintaining the cell's internal environment and carrying out various cellular processes. The plasma membrane also plays a role in cell signaling and communication with the external environment.

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  • 13. 

    Which two structures are found in plant cells but not in animal cells?

    • A.

      Plasma membrane

    • B.

      Cell wall

    • C.

      Nucleus

    • D.

      Chloroplast

    Correct Answer(s)
    B. Cell wall
    D. Chloroplast
    Explanation
    The cell wall is a rigid structure found in plant cells that provides support and protection. It is composed of cellulose and is responsible for maintaining the shape of the cell. Animal cells do not have a cell wall. Chloroplasts are also found in plant cells but not in animal cells. They are responsible for photosynthesis, converting sunlight into energy. These structures contain chlorophyll, which gives plants their green color. The absence of chloroplasts in animal cells is one of the reasons why animals cannot produce their own food through photosynthesis.

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  • 14. 

    Prokaryotic cells (prokaryotes) are very simple cells that do not have a _________.

    Correct Answer(s)
    nucleus
    Explanation
    Only eukaryotes have a nucleus.

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