Tag: immunology

Questions Related to immunology

Antibodies are produced in

bio-chemistry immunology antibodies antibodies and antitoxin antigen and antibody

  1. Human body

  2. Industries

  3. Pharmacy

  4. None of the above

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Correct Option: A

Antigen - A andantibody - B are present in which blood group

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

  1. B

  2. A

  3. AB

  4. 0

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Correct Option: B

Between persons of which two blood groups is the blood transfusion not possible

bio-chemistry immunology blood group blood groups and compatibility advance blood groups and transfusion

  1. 0 and AB (AB recipient)

  2. 0 and A (0 donor)

  3. 0 and B (0 donor)

  4. 0 and AB (AB donor)

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Correct Option: D
Explanation:

The people of blood group AB can receive transfusions of blood from people of any of the four blood groups, are called universal recipients.

Which is true of blood group agglutination test?

bio-chemistry immunology blood group blood groups and compatibility advance blood groups and transfusion

  1. Blood group AB when coagulation occurs with antiserum A

  2. Blood group B when coagulation occurs with antiserum B

  3. Blood group O when coagulation occurs with antiserum A as well as B

  4. None of the above.

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Correct Option: B

One intern calculated the concentration of $O _2$ in blood as 0.0025 ml/ml of blood. Considering atmospheric pressure as 760 mmHg, how much approx. $O _2$ tension could have been in the blood?

bio-chemistry immunology blood group blood groups and compatibility advance blood groups and transfusion

  1. 40mmHg

  2. 60mmHg

  3. 80mmHg

  4. 100mmHg

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Correct Option: A

Choose the correct answer from the alternatives given.
Which of the following is an example of codominance?

bio-chemistry immunology blood group blood groups and compatibility advance blood groups and transfusion

  1. Pink flowers of snapdragon

  2. The ABO blood groups in humans

  3. Sex-linkage in humans

  4. None of these

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Correct Option: B
Explanation:
  • Pink flowers of Snapdragon is a heterozygote phenotype and an intermediate phenotype of the two homozygous phenotypes from which it originates. It is an example of incomplete dominance.
  • Codominance is seen when both the alleles are expressed simultaneously and neither of the alleles is dominant over the other. In human ABO blood grouping system both the alleles I$^A$ and I$^B$ are codominant and hence in the AB blood group individuals both the antigens, A and B are seen. So, the human ABO blood grouping is an example of codominance.
  • The expression of the sex chromosomes in humans differ in males and females and hence are said to be sex-linked.
So, the correct option is 'The ABO blood groups in humans'.