This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
What is a protein that acts as a catalyst to bring about a specific biochemical reaction, while its structure and functions do not change?

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1.1.3 A protein that acts as a catalyst to bring about a specific biochemical reaction, while its structure and functions do not change is an enzyme. Enzymes speed up biochemical reactions without being consumed in the process.
- D) Enzyme
1.1.4 A regulatory substance produced and secreted directly into the blood to stimulate specific cells or tissues into action is a hormone. Hormones act as chemical messengers in the body.
- C) Hormone
1.1.5 An energy reserve that is produced from metabolism of glucose by the liver is glycogen. The liver converts excess glucose into glycogen for storage.
- C) Glycogen
1.1.6 The final usable form of energy inside the cell is adenosine triphosphate (ATP). Cells break down ATP to release energy for various cellular activities.
- Adenosine triphosphate (ATP)
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1.1.3 A protein that acts as a catalyst to bring about a specific biochemical reaction, while its structure and functions do not change is an enzyme.