7th Grade Biology

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  • 1/5 Questions

    Which of the following is the basic unit of life in all living organisms?

    • Atom
    • Molecule
    • Cell
    • Tissue
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About This Quiz

We have all carried out an experiment to show us how photosynthesis occurs and what the basic requirements to ensure its success are. The questions below should be done by you and your lab partner. Ensure you answer them all before the next class. Don’t forget to ask questions if any.

7th Grade Biology - Quiz

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  • 2. 

    What part of the plant cell captures energy from the sun?

    • Chloroplasts

    • Mitochondria

    • Cell membrane

    • Nucleus

    Correct Answer
    A. Chloroplasts
    Explanation
    Chloroplasts are responsible for capturing energy from the sun in plant cells. They contain a pigment called chlorophyll, which absorbs sunlight and converts it into chemical energy through the process of photosynthesis. This energy is then used by the plant to carry out various metabolic processes and to produce glucose, which serves as a source of energy for the cell. Mitochondria are responsible for cellular respiration, not capturing energy from the sun. The cell membrane is involved in regulating the movement of substances in and out of the cell, while the nucleus contains genetic material and is involved in controlling cell functions.

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  • 3. 
    What is the purpose of this reaction? - ProProfs

    What is the purpose of this reaction?

    • To aid in global warming

    • To produce Oxygen

    • For plants to make their own food

    • Both b and c

    Correct Answer
    A. Both b and c
    Explanation
    The purpose of this reaction is to both produce oxygen and allow plants to make their own food. Plants undergo photosynthesis, a process in which they use sunlight, water, and carbon dioxide to produce oxygen and glucose. Oxygen is released into the atmosphere, aiding in global warming, while glucose serves as the plant's source of energy for growth and development. Therefore, the correct answer is both b and c.

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  • 4. 

    What is the first step in an experimental design?

    • Research

    • Hypothesis

    • Conclusion

    • Question

    Correct Answer
    A. Question
    Explanation
    The first step in an experimental design is to formulate a question. This question sets the foundation for the entire experiment and guides the researcher in determining what they want to investigate. It helps in identifying the problem or topic of interest and provides a clear direction for the research. Without a well-defined question, it would be difficult to design an experiment and establish the necessary procedures to find answers or solutions. Therefore, formulating a question is essential to initiate the experimental design process.

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  • 5. 

    What part of a cell does a plant cell have that an animal cell does not?

    • Cell wall

    • Chloroplast

    • Centriole

    • A and b

    Correct Answer
    A. A and b
    Explanation
    A plant cell has both a cell wall and chloroplasts, which are not present in an animal cell. The cell wall provides structural support and protection for the plant cell, while chloroplasts are responsible for photosynthesis, converting sunlight into energy. These features are unique to plant cells and are not found in animal cells.

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  • Current Version
  • Oct 24, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Dec 07, 2009
    Quiz Created by
    Therocknlt
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