A Level Biology Practice Exam 2025 – All-in-One Study Guide to Excel in Your A Levels!

Question: 1 / 715

What is the definition of a product in biological terms?

Molecule produced from substrate molecules by an enzyme catalyzed reaction

In biology, the term "product" specifically refers to the molecules that result from the transformation of substrate molecules during a biochemical reaction, which is often catalyzed by enzymes. When an enzyme interacts with its substrate, it facilitates the conversion of that substrate into products through a series of chemical changes. This outcome is central to understanding metabolic pathways and enzymatic functions, as products are the end results of these reactions, which can have various fates, such as further participation in other metabolic reactions or utilization by the organism.

The definition encompasses both the process of enzymatic catalysis and the significance of the products in broader biological contexts, such as cellular respiration, photosynthesis, and digestion, where reactants are transformed into usable forms of energy or other molecules essential for cellular function and survival.

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A binding site on an enzyme for substrates

A byproduct formed during metabolic reactions

A type of protein that speeds up reactions

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