Concept explainers
Antibodies belong to a class of plasma proteins called
- a. albumins.
- b. gamma globulins.
- c. alpha globulins.
- d. procoagulants.
- e. agglutinins.

Introduction:
The immune system normally serves to protect the body from an external attack. This protective function primarily depends on distinguishing self (the body’s own cells) from non-self. This is crucial to a healthy immune system. The recognizing capacity of the immune system is possible due to the presence of large molecules called antigens, which are expressed and displayed on all cells’ surfaces. Antibodies are molecules that neutralize the pathogens.
Answer to Problem 1TYR
Correct answer:
Gamma globulins are a group of globulins. These molecules are identified based on their position by electrophoresis (serum-protein). Antibodies belong to this group. Therefore, option b is correct.
Explanation of Solution
Justify the reasons for the correct statement:
The antibody molecules belong to a class of secreting protein called as gamma globulins.
Option (b) is given as, “gamma globulins”.
The majority of the gamma globulins (proteins) are immunoglobulins, although some of them do not belong to this group of globulins.
Hence, the option (b) is correct.
Justify reasons for the incorrect statements:
Option (a) is given as, “albumins”.
Albumins are a group of globular proteins. Serum belongs to this group. Hence, it is a wrong answer.
Option (c) is given as, “alpha globulins”.
Alpha globulins are a group of protein molecules. It is present in the plasma. Hence, it is a wrong answer.
Option (d) is given as, “Procoagulants”.
Procoagulants are molecules that are involved in the conversion of inactive protein to active form. Hence, it is a wrong answer.
Option (e) is given as, “agglutinins”.
Agglutinin is any substance or antibody involved in agglutination. Hence, it is a wrong answer.
Hence, options (a), (c), (d), and (e) are incorrect.
The antibody molecules belong to a class of secreting protein called as gamma globulins.
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