Book A Ch 3 Spelling/Vocabulary Test

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Book A Ch 3 Spelling/Vocabulary Test - Quiz


Do not use plural words. Check your work before submitting, all submissions are final.


Questions and Answers
  • 1. 

    The total of all chemical reactions in an organism

    Explanation
    Metabolism refers to the total of all chemical reactions that occur within an organism. It involves the conversion of food into energy, the synthesis of molecules needed for growth and repair, and the breakdown of substances to eliminate waste products. Metabolism is essential for maintaining life and is responsible for various processes such as digestion, respiration, and the production of hormones. It is a complex and interconnected network of reactions that allow organisms to function and adapt to their environment.

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  • 2. 

    An organism that makes its own food

    Explanation
    A producer is an organism that is capable of producing its own food through photosynthesis or chemosynthesis. This process involves converting sunlight or inorganic substances into organic compounds that can be used as energy sources. Producers play a vital role in ecosystems as they are the primary source of energy for other organisms. They form the foundation of the food chain by providing food for consumers such as herbivores and omnivores. Therefore, the term "producer" accurately describes an organism that makes its own food.

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  • 3. 

    Movement of molecules from an area where there are many to an area where there are few

    Explanation
    Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration. This movement occurs because molecules are in constant motion and tend to spread out to occupy available space. In this case, the explanation suggests that the correct answer is diffusion, as it accurately describes the movement of molecules from an area where there are many molecules to an area where there are fewer molecules.

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  • 4. 

    Compound that does not contain carbon inorganic compound (2 words)

    Explanation
    An inorganic compound is a compound that does not contain carbon. Inorganic compounds can include minerals, metals, and nonmetals. These compounds are typically formed by the combination of elements other than carbon, such as oxygen, nitrogen, sulfur, and various metals. In contrast, organic compounds are compounds that contain carbon and are typically associated with living organisms. Therefore, an inorganic compound is the correct answer for a compound that does not contain carbon.

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  • 5. 

    A substance that speeds up a chemical reaction in a cell

    Explanation
    Enzymes are substances that act as catalysts, speeding up chemical reactions in cells. They do so by lowering the activation energy required for the reaction to occur. Enzymes are highly specific and can only catalyze specific reactions. They bind to specific molecules called substrates and convert them into products. This allows biochemical reactions to occur at a faster rate, enabling essential cellular processes such as metabolism and DNA replication. Enzymes are crucial for maintaining the normal functioning of cells and are essential for life.

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  • 6. 

    Passive transport of water by diffusion

    Explanation
    Osmosis is the process by which water molecules move from an area of lower solute concentration to an area of higher solute concentration through a semi-permeable membrane. It is a type of passive transport, as it does not require energy input. In this case, the correct answer suggests that the movement of water is occurring through osmosis, as it is being transported by diffusion across a membrane.

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  • 7. 

    When the contents of a vesicle are released by the cell

    Explanation
    Exocytosis is the process by which a cell releases the contents of a vesicle. This involves the fusion of the vesicle membrane with the cell membrane, allowing the contents to be expelled outside of the cell. This mechanism is essential for various cellular functions, such as neurotransmitter release in nerve cells and hormone secretion in endocrine cells. By undergoing exocytosis, cells are able to communicate with other cells, regulate physiological processes, and maintain homeostasis.

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  • 8. 

    Movement of substances without the use of energy

    Explanation
    Diffusion is the process of movement of substances from an area of higher concentration to an area of lower concentration, without the use of energy. This occurs due to the random motion of particles, which leads to their spread out and equal distribution. Diffusion plays a crucial role in various biological and physical processes, such as the exchange of gases in the lungs, the movement of nutrients and waste products in cells, and the mixing of substances in solutions.

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  • 9. 

    Large molecules are surrounded by the cell membrane and enter the cell

    Explanation
    Endocytosis is a process in which large molecules are engulfed by the cell membrane and brought into the cell. This mechanism allows the cell to take in substances from the external environment, such as nutrients or signaling molecules, by forming a vesicle around them. Endocytosis is essential for various cellular functions, including the uptake of proteins, lipids, and other macromolecules. By internalizing these molecules, the cell can regulate its internal environment and perform necessary processes like receptor-mediated endocytosis or phagocytosis.

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  • 10. 

    A combination of substances; each substance keeps its identity

    Explanation
    A mixture is a combination of substances where each substance retains its own identity. In other words, the different substances are physically mixed together, but they do not chemically react or combine with each other. This allows each substance to maintain its unique properties and can be separated from the mixture using various methods such as filtration or distillation.

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