Zein' protein is related to which crop?

Question

Accepted Answer

Zein protein is related to **Maize** (Option 3).

Here's a detailed explanation:

**Why Option 3 (Maize) is correct:**
Zein is the major storage protein found in the kernels of maize (corn). It is a prolamin protein, characterized by its solubility in alcohol solutions (like 70-80% ethanol). Zein constitutes a significant portion (up to 60%) of the total protein content in maize endosperm. It plays a crucial role in providing amino acids for the developing maize embryo. Beyond its biological function, zein has various industrial applications due to its film-forming, hydrophobic, and biodegradable properties, being used in coatings, plastics, and food packaging. Its presence is a defining characteristic of maize protein composition.

**Why other options are incorrect:**

*   **1. Soybean:** The primary storage proteins in soybean are globulins, mainly glycinin (11S globulin) and beta-conglycinin (7S globulin). Zein is not found in soybean.
*   **2. Paddy:** Paddy, or rice, primarily contains glutelin proteins (like oryzenin) as its major storage protein, along with smaller amounts of prolamins, albumins, and globulins. Zein is not found in paddy.
*   **4. Oat:** The main storage proteins in oat are globulins and avenins (a type of prolamin). While oats do contain prolamins, the specific protein known as zein is unique to maize.