Introduction:
In the human body, various juices are secreted by different organs to aid in the process of digestion. These juices contain enzymes that help in breaking down food molecules into smaller, absorbable forms. However, there is one juice among the given options that does not contain any enzymes.

Gastric Juice:
Gastric juice is secreted by the gastric glands in the stomach. It plays a crucial role in the digestion of proteins. Gastric juice is composed of hydrochloric acid (HCl) and pepsinogen. HCl helps in creating an acidic environment in the stomach, which is necessary for the activation of pepsinogen. Pepsinogen is converted into pepsin, an enzyme that breaks down proteins into smaller peptide fragments. Therefore, gastric juice contains enzymes and is not the correct answer.

Bile Juice:
Bile juice is produced by the liver and stored in the gallbladder. It is released into the small intestine to aid in the digestion and absorption of fats. Bile juice does not contain any enzymes. Instead, it contains bile salts and pigments. Bile salts help in the emulsification of fats, breaking them down into smaller droplets, which increases the surface area for the action of enzymes. Bile pigments, such as bilirubin, give bile its characteristic yellowish-green color. Therefore, bile juice is the correct answer as it does not contain any enzymes.

Salivary Juice:
Salivary juice is produced by the salivary glands in the mouth. It contains an enzyme called amylase, also known as ptyalin. Amylase begins the digestion of carbohydrates by breaking down complex starch molecules into simpler sugars like maltose. Therefore, salivary juice contains enzymes and is not the correct answer.

Pancreatic Juice:
Pancreatic juice is produced by the pancreas and released into the small intestine. It contains a variety of enzymes that aid in the digestion of carbohydrates, proteins, and fats. These enzymes include pancreatic amylase, trypsin, chymotrypsin, and lipase. Pancreatic amylase breaks down carbohydrates, trypsin and chymotrypsin break down proteins, and lipase breaks down fats. Therefore, pancreatic juice contains enzymes and is not the correct answer.

Conclusion:
Among the given options, bile juice is the correct answer as it does not contain any enzymes. The other juices - salivary juice, gastric juice, and pancreatic juice - all contain enzymes that play important roles in the digestion of different types of food molecules.

Bile juice secreted by the liver in the human body does not contain any enzyme. Rather, the bile salts present in the bile juice breakdown fats into small globules increasing the efficiency of the action of the pancreatic enzymes.