This biology question covers important biological concepts and processes. The step-by-step explanation below helps you understand the underlying mechanisms and reasoning.
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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)