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

Introduction to T Lymphocytes

Microbiology

20. Adaptive Immunity

Introduction to T Lymphocytes

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Multiple Choice

Which of the following is NOT a component of TCRs?

Alpha chain.

CD3 complex.

Constant & Variable Regions.

Beta chain.

None of the above.

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Verified step by step guidance

Understand the structure of T-cell receptors (TCRs), which are crucial for the immune response. TCRs are composed of two different polypeptide chains, typically an alpha and a beta chain, each having constant and variable regions.

Recognize that the alpha and beta chains of TCRs are similar to the light and heavy chains of antibodies, with variable regions responsible for antigen recognition.

Identify the role of the CD3 complex, which is not a part of the TCR itself but is associated with it. The CD3 complex is essential for signal transduction once the TCR binds to an antigen.

Differentiate between components that are intrinsic to the TCR structure (alpha and beta chains, constant and variable regions) and those that are associated but not part of the TCR structure (CD3 complex).

Conclude that the CD3 complex, while associated with TCRs, is not a structural component of the TCR itself, making it the correct answer to the question.