Which protein constitutes the majority of plasma protein?Multiple choice question.AlbuminFibrinogenβ-Globulinα-Globulin

Step 1: Break Down the Problem

We need to identify which protein constitutes the majority of plasma proteins from the given options: Albumin, Fibrinogen, β-Globulin, and α-Globulin.

Step 2: Relevant Concepts

Plasma proteins can be categorized into various groups, primarily:

1. Albumin - Helps maintain osmotic pressure and transport substances.
2. Fibrinogen - Essential for blood clotting.
3. Globulins - Include enzymes and antibodies, classified as alpha, beta, and gamma.

Step 3: Analysis and Detail

Albumin makes up approximately 60% of the total plasma protein content. It plays a crucial role in maintaining oncotic pressure in the blood and transporting various substances. Fibrinogen, while important for clotting, is present in much lower concentrations (around 4% of plasma proteins). Both α-Globulin and β-Globulin also contribute to the plasma protein composition but in lesser amounts compared to albumin.

Step 4: Verify and Summarize

Based on the composition proportions, Albumin is the most abundant plasma protein, constituting about 60% of the total plasma protein content.

Final Answer

Albumin constitutes the majority of plasma proteins among the given options.