Regents Living Environment Regents May 2024

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What is an allergy?

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An allergy is a reaction of the immune system to a substance (allergen) that is usually harmless to most people, causing symptoms such as difficulty breathing.

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What is the role of enzymes in chemical reactions?

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Enzymes are biological catalysts that speed up chemical reactions in cells by lowering the activation energy required for the reaction.

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What is the function of lysosomes in a cell?

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Lysosomes are organelles that contain digestive enzymes to break down waste materials and cellular debris.

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What is the significance of maintaining an appropriate temperature in organisms?

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Maintaining an appropriate temperature is crucial because enzymes require specific temperature ranges to function effectively in catalyzing vital biochemical reactions.

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What is the process of natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is the function of insulin in the body?

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Insulin is a hormone that regulates blood sugar levels by facilitating the uptake of glucose into cells.

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What is a stimulus in biological terms?

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A stimulus is any change in the environment that can provoke a response from an organism.

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What is an adaptation?

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An adaptation is a characteristic or trait that enhances an organism's ability to survive and reproduce in its environment.

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What is the role of citric acid in preventing browning in fruits?

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Citric acid slows the rate of enzyme action that causes browning in fruits when they are exposed to air.

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What is the difference between single-celled and multicellular organisms?

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Single-celled organisms consist of one cell that performs all life functions, while multicellular organisms are made up of many cells that can specialize in different functions.