Understanding Enzymes Used in Meat Tenderising

Meat tenderising is a process that makes meat easier to chew. One common way to tenderise meat is by using enzymes. These enzymes break down the tough proteins, particularly collagen and muscle fibers, that make meat firm.

Identifying the Meat Tenderiser Enzyme

The question asks to identify an enzyme that works as a meat tenderiser among the given options. Let's look at each option:

• Papain: This enzyme is derived from the papaya fruit. It is a protease, meaning it specifically breaks down proteins. Papain is well-known and widely used commercially to tenderise meat because it effectively breaks down muscle fibers and connective tissues.
• Lipases: These enzymes break down lipids, which are fats. They are involved in fat digestion but do not tenderise meat, which requires breaking down proteins.
• Amylase: This enzyme breaks down starch and other carbohydrates into simpler sugars. It is involved in carbohydrate digestion but has no effect on the protein structure of meat.
• Trypsin: This is also a protease enzyme, found in the digestive systems of many animals. While it breaks down proteins, papain is specifically the enzyme commonly used as a commercial meat tenderiser sourced from plants.

Based on the function of these enzymes, Papain is the one specifically used for tenderising meat by breaking down proteins.

How Papain Tenderises Meat

Papain works by breaking the peptide bonds that link amino acids in proteins. In meat, this action targets the long protein molecules that make up muscle fibers and the connective tissue like collagen. By breaking these large proteins into smaller pieces, the overall structure of the meat becomes less tough, resulting in a more tender texture. Papain is typically applied to the surface of the meat, often in a marinade or as a powder, and its activity is sensitive to temperature.

Why Other Options are Not Meat Tenderisers

As discussed above, Lipases and Amylase break down fats and carbohydrates respectively, not the proteins responsible for meat toughness. While Trypsin is a protease, it's not the enzyme primarily known or used as a commercial plant-derived meat tenderiser; Papain fits this description perfectly.

Summary of Enzyme Functions

Therefore, the enzyme that works as a meat tenderiser among the given options is Papain.

Revision Table: Key Enzymes

Let's quickly recap the main functions of the enzymes discussed:

• Papain: Breaks down proteins.
• Lipases: Break down fats.
• Amylase: Breaks down carbohydrates (starch).
• Trypsin: Breaks down proteins.

Remember, meat tenderising involves breaking down proteins, making Papain the correct choice.

Additional Information on Meat Tenderising Enzymes

Besides Papain, other enzymes are also used for meat tenderising, such as:

• Bromelain: Another protease, found in pineapple.
• Ficin: A protease found in figs.

These enzymes work similarly to Papain, breaking down proteins in the meat to improve tenderness. They are all types of proteases. The choice of enzyme can sometimes affect the flavour and the extent of tenderising.