Cells and Cell Division Quiz

Grade 7 · Science · Quiz

Test your knowledge of cell structure and the stages of mitosis.

Questions

1. Which organelle contains the cell's DNA?

   1. Mitochondria
   2. Ribosome
   3. Nucleus
   4. Vacuole
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   Answer: Nucleus

   The nucleus stores DNA and controls all cell activities.

2. Eukaryotic cells include both plant and animal cells.

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   Answer: True

   Both plant and animal cells are eukaryotic — they both have a membrane-bound nucleus.

3. What must happen to DNA before a cell can divide?

   1. It must be destroyed
   2. It must be replicated (copied)
   3. It must leave the nucleus
   4. It must become RNA
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   Answer: It must be replicated (copied)

   DNA replication creates an exact copy so each daughter cell receives a full set of genetic instructions.

4. Cancer is caused by ___ cell division.

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   Answer: uncontrolled

   Cancer occurs when the normal controls on cell division fail, causing cells to multiply without stopping.

5. During anaphase, what happens to the chromosomes?

   1. They line up in the middle
   2. They become invisible
   3. They are pulled to opposite poles
   4. They fuse together
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   Answer: They are pulled to opposite poles

   During anaphase, spindle fibers contract and pull sister chromatids to opposite ends of the cell.

6. Meiosis produces cells with the same number of chromosomes as the parent cell.

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   Answer: False

   Meiosis produces cells with half the normal chromosome number (haploid cells) used for sexual reproduction.

7. Which of the following is the correct order of mitosis stages?

   1. Metaphase, Prophase, Anaphase, Telophase
   2. Prophase, Metaphase, Anaphase, Telophase
   3. Anaphase, Prophase, Telophase, Metaphase
   4. Telophase, Anaphase, Metaphase, Prophase
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   Answer: Prophase, Metaphase, Anaphase, Telophase

   The order is Prophase → Metaphase → Anaphase → Telophase (PMAT is a helpful mnemonic).

8. The smallest unit of life is the ___.

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   Answer: cell

   The cell theory states that the cell is the fundamental unit of life for all living organisms.

9. What type of cells do bacteria have?

   1. Eukaryotic
   2. Multicellular
   3. Prokaryotic
   4. Somatic
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   Answer: Prokaryotic

   Bacteria are prokaryotes — they have no true membrane-bound nucleus, unlike plant and animal cells.

10. Cytokinesis occurs before mitosis.

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    Answer: False

    Cytokinesis comes after mitosis. Mitosis divides the nucleus first, then cytokinesis splits the cytoplasm.

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