which one is the major globin present in adult human being

Options

A. `alpha_(2)beta_(2)`
B. `alpha_(2)epsi_(2)`
C. `alpha_(2)gamma_(2)`
D. `alpha_(2)epsi_(2)`

Answer

To answer the question "Which one is the major globin present in adult human beings?" we can follow these steps:

### Step 1: Understand the Structure of Hemoglobin
Hemoglobin is a protein in red blood cells responsible for carrying oxygen. It is made up of globin chains, which are polypeptide chains.

**Hint**: Hemoglobin consists of different types of globin chains that combine to form its structure.

### Step 2: Identify the Types of Globin Chains
In adult humans, the main types of globin chains are alpha (α) and beta (β). There are also fetal globin chains like gamma (γ) and epsilon (ε), but these are not predominant in adults.

**Hint**: Focus on the globin chains that are present in adults rather than those found in fetal development.

### Step 3: Determine the Composition of Adult Hemoglobin
The most common form of hemoglobin in adults is Hemoglobin A (HbA), which is composed of two alpha (α) and two beta (β) chains, denoted as α2β2.

**Hint**: Remember that the composition of hemoglobin is crucial in identifying the major globin present in adults.

### Step 4: Analyze the Given Options
The options provided are:
1. α2β2
2. α2ε2
3. α2γ2
4. α2β2 (repeated)

From the analysis, we can see that the correct composition of adult hemoglobin is α2β2.

**Hint**: Compare the options to the known composition of adult hemoglobin to find the correct answer.

### Step 5: Conclusion
The major globin present in adult human beings is α2β2, which is the most common form of hemoglobin (HbA), comprising about 97% of total hemoglobin in normal adults.

**Final Answer**: The major globin present in adult human beings is α2β2.