Tag: immunity and blood groups

Questions Related to immunity and blood groups

The natural antibodies in the plasma of a person with blood group 'O' is

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. anti-A

  2. anti-B

  3. anti-A and anti-B

  4. anti-B and anti-D

  5. anti-D.

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Correct Option: C

Clumping of RBC may occur when blood of one person is mixed with serum or blood of another person. This is due to

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. Antigen-antibody reaction

  2. Antitoxin-antibody reaction

  3. Antigen-antigen reaction

  4. Antibody-antibody reaction

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Correct Option: A
Explanation:

The RBC membrane contains either antigen A or antigen B, or both Antigen A and B or no antigen at all, accordingly the blood is classified as blood group A , B , AB and O respectively. The blood plasma of blood group A will have antibodies for B, that of B will have antibodies for A,  that of AB will have non, while that of O will have both the antibodies. If blood is transfused at random this will lead to antigen-antibody reaction - like if A is the blood group of the recipient while the blood group of the donor happens to be B, this will lead to clumping of the RBCs.

So, the correct answer is 'Antigen-antibody reaction'

Anti-A and Anti-B antibodies are not found in which of the following blood group?

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. AB

  2. A

  3. O

  4. B

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Correct Option: A
Explanation:

The cell membrane of RBCs in AB blood group contain both antigen A as well as antigen B therefore the blood plasma does not contain antibody A and Antibody B, to prevent the coagulation of blood cells due to antigen-antibody reactions.

So, the correct answer is 'AB'

A boy has the blood group 0. What is true of the inheritance of this blood group in his case?

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. His mother should be with AB blood group

  2. Both his parents could be heterozygous A group

  3. His father could be homozygous B group

  4. His mother could be homozygous A group

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Correct Option: B
Explanation:

If the boy has blood group o, both his parents could probably be heterozygous A group, $I^AI^O$, in both the parents.

So, the correct option is 'Both his parents could be heterozygous A group'.

Rh factor was discovered by

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. Landsteiner and Weiner

  2. William Harvey

  3. Malpighi

  4. None of these

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Correct Option: A
Explanation:

Rh factor is an independent antigen present on the RBC irrespective of the presence of Antigen A or B. This factor is passed down from genus Rhesus macaque  (monkey) to humans and is regarded as the Rh factor it was discovered by Landsteiner and Weiner.

so, the correct answer is 'Landsteiner and Weiner'

Genotype of human blood group 'O' will be ______________.

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. $I^A I^A$

  2. $I^A I^B$

  3. ii

  4. $I^A i$

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Correct Option: A

A child's blood group is `O'. The parents blood groups cannot be

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. AB and 0

  2. B and 0

  3. A and B

  4. A and A

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Correct Option: A

A woman of blood group O' presented a baby of blood groupO' which she claimed as her child. She brought a suit against a man of 'AB' group as the father of the child. 

Which statement is correct as per your judgement

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. The father and mother claimed are the true persons

  2. Father is true and mother is not the true person

  3. Both the parentage claims are false

  4. Mother is the true person and father claimed is not true

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Correct Option: D

In a medico-legal case of accidental interchange between two babies in a hospital, the baby of blood group A could not be rightly given to a people

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. With both husband and wife of group 0

  2. Husband of group 0 and wife of group A

  3. Husband of group A and wife of group 0

  4. Both husband and wife of group A

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Correct Option: A

Which blood group called as universal donar?

bio-chemistry immunity and blood groups blood group blood groups and compatibility advance blood groups and transfusion compatibility of blood groups

  1. $AB$

  2. $A$

  3. $B$

  4. $O$

Show answer
Correct Option: D
Explanation:

Type O ( specifically O negative ) blood is called the universal donor type because it is compatible with any blood type. O blood group does not contain any antigen hence does not result in transfusion reactions.


So, the correct option is 'O'.