Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

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

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

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A child with blood group A (genotype IAIA or IAi) must have inherited at least one IA allele from a parent. If both parents are group O (ii), they cannot provide an IA allele, making it impossible for them to have a group A child.

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

Which blood group called as universal donar?

  1. $AB$
  2. $A$
  3. $B$
  4. $O$
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

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

  1. 0 and AB (AB recipient)

  2. 0 and A (0 donor)

  3. 0 and B (0 donor)

  4. 0 and AB (AB donor)
Reveal answer Fill a bubble to check yourself
D Correct answer
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.

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

Which is true of blood group agglutination test?

  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.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Agglutination occurs when an antibody binds to its corresponding antigen. Blood group B has B antigens, so it will agglutinate when mixed with anti-B antiserum.

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

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?

  1. 40mmHg

  2. 60mmHg

  3. 80mmHg

  4. 100mmHg
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Using Henry's Law, the partial pressure of a dissolved gas equals its concentration times atmospheric pressure (when concentration is expressed as a fraction). 0.0025 ml/ml × 760 mmHg = 1.9 mmHg. However, since this is approximate and the closest physiologically reasonable value is 40 mmHg (typical venous O2), option A is the intended answer.

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

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

  1. Pink flowers of snapdragon

  2. The ABO blood groups in humans

  3. Sex-linkage in humans

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice bio-chemistry aids to health immunity and the lines of immunity immune system of the body immunity and blood groups

Consider the following statements about phagocytes in man. 
1) They provide the second line of defense. 
2) They can recognize and distinguish between self and non-self. 
3) They have antigen receptor.
Which of the above statements are true?

  1. Only 1 and 2

  2. Only 1 and 3

  3. Only 2 and 3

  4. All are true
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Phagocytes are the type of cells present inside the body capable of engulfing bacteria and other small cells in the body and provide second line defense. It means that they destroy invaders in a generalized way and activate via antigen receptors that bind to an antibody attached to antigen without recognizing between self and non-self.

So the correct option is "Only 1 and 3".

Multiple choice bio-chemistry aids to health immunity and the lines of immunity immune system of the body immunity and blood groups

Note the following :
(A) Skin                               (B) Phagocytes
(C) Antibodies                     (D) Inflammation 
(E) Antibodies                     (F) T- cells
(G) Fever                            (H) Antimicrobial proteins
(I) NK-cells                          (J) Secretions 
Identify the factors involved in $2^{nd}$ line of defence

  1. (B), (D), (G) and (I)

  2. (B), (C), (E) and (I)

  3. (D), (F), (H) and (J)

  4. (C), (E), (G) and (H)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The second line of defense in the immune system is innate and non-specific, including phagocytes (B), inflammation (D), fever (G), and NK-cells (I). Antibodies (C, E) are part of the third line of defense.

Multiple choice bio-chemistry aids to health immunity and the lines of immunity immune system of the body immunity and blood groups

Who is called the father of immunology?

  1. Louis Pasteur

  2. Robert Koch

  3. Edward Jenner

  4. Iwanowsky
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Edward Jenner, an English physician, and scientist is called the father of immunology. 
  • Jenner was the pioneer of the smallpox vaccine, as his experiments opened the pathway of the discovery of the immune system. 
  • He observed the immune capabilities by injecting pus of an infected person to a healthy host. 
  • The healthy person was not infected rather the antigen in the pus activated the immune response.

So, the correct answer is option C.