Differentiate between fibrous and globular proteins.

To differentiate between fibrous and globular proteins, we need to understand their structural characteristics and functions.

1. Structural Characteristics:

   • Fibrous proteins have a long, elongated shape with a repetitive pattern of secondary structures, such as alpha helices or beta sheets. This gives them a fibrous or thread-like appearance.
   • Globular proteins, on the other hand, have a compact, spherical shape with a more irregular arrangement of secondary structures. They do not have a repetitive pattern like fibrous proteins.

2. Function:

   • Fibrous proteins are typically involved in providing structural support and strength to cells and tissues. Examples of fibrous proteins include collagen, which forms the structural framework of connective tissues, and keratin, which makes up hair and nails.
   • Globular proteins, on the other hand, have a wide range of functions, including enzymatic activity, transport of molecules, immune response, and cell signaling. Examples of globular proteins include enzymes like amylase, which helps in the digestion of carbohydrates, and antibodies, which are involved in the immune response.

In summary, fibrous proteins have a long, thread-like structure and are involved in providing structural support, while globular proteins have a compact, spherical shape and have diverse functions such as enzymatic activity and immune response.