The Question is from neet-zoology body-fluids-and-circulation , and it was created by the author T HARITHA

Question

In individuals with blood type AB, which of the following BEST describes the interaction between their blood serum and erythrocytes from a type O individual?

T HARITHA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
 **Primary Concept**: Blood typing and agglutination
 **Related Topics**: ABO blood group system, antibodies, antigens
 **Prerequisites**: Understanding of antigens and antibodies, ABO blood group system.
## SOLUTION PATHWAY
**Given Information**:
  Individuals with blood type AB have both A and B antigens on their red blood cells (erythrocytes) and neither anti-A nor anti-B antibodies in their blood serum.
  Type O individuals have neither A nor B antigens on their erythrocytes, but they have both anti-A and anti-B antibodies in their serum.
**Method & Steps**:
 1. Determine the antigens present on the type O erythrocytes.
  Reasoning: Type O blood lacks A and B antigens.
  Formula/Rule: None
 2. Identify the antibodies present in the blood serum of an individual with blood type AB.
  Working: Individuals with blood type AB have no anti-A or anti-B antibodies in their serum.
  Key Point: The absence of antibodies is crucial for understanding the interaction.
 3. Analyze the interaction between the type O erythrocytes and the AB serum.
  Result: Since there are no anti-A or anti-B antibodies in the AB serum to react with the A and B antigens (which are absent in type O blood), no agglutination (clumping) will occur.
  Verification: The absence of antigen-antibody reaction confirms the lack of agglutination.
 ## OPTION ANALYSIS
A ✓: No agglutination occurs. This is correct because type AB serum lacks antibodies that would react with type O erythrocytes.
B :x: Agglutination occurs due to anti-A antibodies. This is incorrect because type AB serum lacks anti-A antibodies.
C :x: Agglutination occurs due to anti-B antibodies. This is incorrect because type AB serum lacks anti-B antibodies.
D :x: Agglutination occurs due to both anti-A and anti-B antibodies. This is incorrect because type AB serum lacks both anti-A and anti-B antibodies. 
 ## LEARNING AIDS
 **Common Mistakes**:
  1.Confusing antigens and antibodies: Remember antigens are on the red blood cell surface, and antibodies are in the serum.
  2.Incorrectly associating blood type with antibody presence: Type AB has no antibodies, Type O has both anti-A and anti-B.
 **Quick Tips**:
  1.Use a table to summarize antigen and antibody presence in different blood types.
  2.Memorize the rule: Antibodies react with antigens they do not recognize.

T HARITHA · Answer

The correct Option is "No agglutination occurs"

T HARITHA · Answer

Agglutination occurs due to anti-A antibodies

T HARITHA · Answer

Agglutination occurs due to anti-B antibodies

T HARITHA · Answer

Agglutination occurs due to both anti-A and anti-B antibodies

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