Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

20. Adaptive Immunity

Clonal Selection

Microbiology

20. Adaptive Immunity

Clonal Selection

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Multiple Choice

Which of the following is NOT an organ where clonal selection occurs?

Spleen.

Lymph nodes.

Bone marrow.

Mucosa associated lymphoid tissue.

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Verified step by step guidance

Understand the concept of clonal selection: Clonal selection is a process in the immune system where specific B or T lymphocytes are selected for proliferation based on their ability to bind to an antigen. This process primarily occurs in secondary lymphoid organs.

Identify the primary and secondary lymphoid organs: Primary lymphoid organs include the bone marrow and thymus, where lymphocytes are generated and mature. Secondary lymphoid organs include the spleen, lymph nodes, and mucosa-associated lymphoid tissue (MALT), where clonal selection typically occurs.

Analyze the options given: The options provided are spleen, lymph nodes, bone marrow, and mucosa-associated lymphoid tissue.

Determine where clonal selection occurs: Clonal selection occurs in secondary lymphoid organs such as the spleen, lymph nodes, and MALT. These are sites where mature lymphocytes encounter antigens and undergo clonal expansion.

Identify the organ that does not fit: Bone marrow is a primary lymphoid organ where lymphocytes are produced and mature, but it is not a site for clonal selection. Therefore, bone marrow is the correct answer as it is not an organ where clonal selection occurs.