Biology Review for S1 Finals

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What is DNA sequencing and why is it important in biology?

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DNA sequencing is the process of determining the exact sequence of nucleotides in a DNA molecule. It is important because it allows scientists to understand genetic information, identify genetic disorders, and study evolutionary relationships.

Front

What is the role of enzymes in biological 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 to occur.

Front

What happens to an enzyme if its active site is altered?

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If an enzyme's active site is altered, it may no longer bind to its substrate, rendering it ineffective in catalyzing the reaction.

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What is the ATP-ADP cycle?

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The ATP-ADP cycle is a process in which ATP (adenosine triphosphate) is converted to ADP (adenosine diphosphate) and energy is released for cellular work, and then ADP is converted back to ATP using energy from food or light.

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What factors can affect enzyme activity?

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Factors that can affect enzyme activity include temperature, pH, substrate concentration, and the presence of inhibitors or activators.

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What is the significance of pH in enzyme activity?

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pH affects the shape and charge of an enzyme, which can influence its ability to bind to substrates and catalyze reactions. Each enzyme has an optimal pH range.

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What are biomolecules and their types?

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Biomolecules are organic molecules that are essential for life. The main types include carbohydrates, proteins, lipids, and nucleic acids.

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How do carbohydrates function as energy sources?

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Carbohydrates are broken down into glucose, which is used by cells for energy. They provide a quick source of energy for cellular processes.

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What is the difference between ATP and ADP?

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ATP (adenosine triphosphate) is a high-energy molecule that stores energy, while ADP (adenosine diphosphate) is a lower-energy molecule that results from the release of energy from ATP.

Front

What is the importance of using a range of pH levels in enzyme experiments?

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Using a range of pH levels allows scientists to determine the optimal pH for enzyme activity and understand how pH affects enzyme function.