Tadpoles must undergo a major metamorphosis to become frogs. This change includes reabsorption of the tail, growth of limbs, calcification of the skeleton, increase in rhodopsin in the eye, development of lungs, change in hemoglobin structure, and reformation of the gut from the long gut of an herbivore to the short gut of a carnivore. Amazingly, all of these changes are induced by thyroxine. What is the most likely explanation for such a wide array of effects of thyroxine?

#Question id: 40474

#Applied Microbiology

Which molecule is constitutively expressed on the surface of professional Antigen-Presenting Cells (APCs) to present antigenic peptides to CD4+ T cells?

#Question id: 40475

#Applied Microbiology

Which of the following cells is considered the most potent professional antigen-presenting cell, capable of activating naive T cells?

#Question id: 40476

#Applied Microbiology

Basophils, which are not antigen-presenting cells, are primarily known for releasing which inflammatory mediator?

#Question id: 40477

#Applied Microbiology

Read the following statements regarding immune cells and select the correct option.

Statement I: All nucleated cells in the body can act as professional antigen-presenting cells

Statement II: B cells internalize antigens via receptor-mediated endocytosis and present them to Helper T cells.

#Question id: 40478

#Applied Microbiology

Consider the following statements about Macrophages:

1. They are phagocytic cells.

2. They express MHC Class II molecules on their surface.

3. They are classified as granulocytes like Basophils.

   Which of the statements given above are correct?

#Question id: 40479

#Applied Microbiology

 Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A): Dendritic cells are critical for initiating a primary immune response.

Reason (R): They are the only antigen-presenting cells capable of stimulating naive T cells.