In agglutination tests, what does the clumping or aggregation of particulate antigens indicate?

Question

BlackTom AI · Accepted Answer

The question asks what clumping or aggregation of particulate antigens indicates in agglutination tests.
Option a: A failed test due to improper handling. While improper handling can cause errors, clumping is not primarily a sign of a procedural failure; it is about the interaction between antibodies and antigens, so this is not the best explanation for the observed phenomenon.
Option b: The presence of antibodies that do not match the antigens. Mismatched antibodies and antigens would typically prevent or weaken agglutination, not produce proper clumping, so this would not explain the positive aggregation signal.
Option c: The absence of antibodies in the sample. If there were no antibodies, agglutination would be unlikely to occur, so this option contradicts the observed clumping and is therefore incorrect.
Option d: The presence of specific antibodies in the sample. In agglutination assays, clumping occurs when antibodies in the sample bind to the corresponding antigens on particles, causing cross-linking and visible aggregation. This is the classic interpretation of a positive agglutination result and aligns with immunology principles of antigen–antibody interactions.
Therefore, option d accurately describes what the clumping indicates, while the other options describe scenarios that would not produce the observed agglutination pattern.

In agglutination tests, what does the clumping or aggregation of particulate antigens indicate?单项选择题

类似问题

What is the primary purpose of serology in the field of clinical diagnostic microbiology?

When performing an Indirect ELISA, what does a positive result indicate?

A 62.9 kg lady is standing on a weighing scale in an elevator as shown in the diagram below. Assume gravitational acceleration = 15 ms-2 Given that the elevator is accelerating upwards at 3.7 ms-2 , determine the magnitude of the normal force on the lady.

An object is fired from ground level at an angle of 31.9 degrees to the horizontal. Taking acceleration due to gravity = 7.65 ms-2 If the initial speed is 5.6 ms-1, how far from the starting point will it hit the ground? Assume air resistance is negligible.

Which of the following equations of motion would be used to calculate the displacement given the initial and final velocities as well as the acceleration?

A 51.8 kg lady is standing on a weighing scale (calibrated to 9.81 ms-2) in an elevator as shown in the diagram below. The scale is then calibrated to 7.67 ms-2 Given that the elevator is accelerating downwards at 2.2 ms-2 , determine the reading on the scale.

An object is fired from ground level at an angle of 39 degrees to the horizontal. Taking acceleration due to gravity = 7.65 ms-2 If the initial speed is 6.8 ms-1, how far from the starting point will it hit the ground? Assume air resistance is negligible.

Which of the following equations of motion would be used to calculate the displacement given the initial and final velocities as well as the time taken?

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单