Multiple Choice
In human blood plasma, which protein is the most abundant by concentration?
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1. Introduction to Biochemistry
Proteins
Multiple Choice
Which of the following is NOT considered a major plasma protein in human blood?
A
Albumin
B
Fibrinogen
C
Immunoglobulin G (IgG)
D
Keratin
Verified step by step guidance1
Step 1: Understand what major plasma proteins are. Major plasma proteins are proteins found in the blood plasma that have important physiological roles such as maintaining osmotic pressure, immune defense, and blood clotting.
Step 2: Identify the common major plasma proteins in human blood. These typically include Albumin (which maintains osmotic pressure), Fibrinogen (involved in blood clotting), and Immunoglobulins like IgG (which are antibodies involved in immune response).
Step 3: Recognize that Keratin is a structural protein found primarily in hair, nails, and the outer layer of skin, and it is not normally present in blood plasma.
Step 4: Compare the options given: Albumin, Fibrinogen, and Immunoglobulin G are all major plasma proteins, whereas Keratin is not a plasma protein at all.
Step 5: Conclude that the protein NOT considered a major plasma protein in human blood is Keratin.
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