AQA Food Preparation and Nutrition Practice Exam 2025 – Comprehensive Study Guide

Water-soluble vitamins, such as the B vitamins and vitamin C, play a crucial role in the body's metabolism, primarily by facilitating the conversion of carbohydrates and fats into energy. These vitamins act as coenzymes, helping enzymes in the metabolic processes that break down food substances to produce energy. For instance, B vitamins, including thiamine, riboflavin, niacin, and others, are essential for various metabolic pathways that ultimately generate energy in the form of ATP (adenosine triphosphate) from the nutrients consumed in the diet.

The energy-releasing function of water-soluble vitamins is vital for maintaining overall health and supporting various bodily functions, such as muscle activity, brain function, and cellular processes. Without adequate amounts of these vitamins, the efficiency of energy metabolism can be compromised, leading to fatigue and other health issues.

In contrast, storing fat for energy relates to the function of fat-soluble vitamins and the body's adipose tissue. Synthesizing hormones involves different processes and is not the primary role of water-soluble vitamins. Building muscle tissue is primarily associated with protein intake and elements like amino acids rather than the direct role of water-soluble vitamins. Therefore, option C accurately captures the essential role of water-soluble