Antibodies are y-shaped molecules that have two identical binding sites. suppose that you have obtained an antibody that is specific for the extracellular domain of an rtk. when the antibody binds to the rtk, it brings together two rtk molecules. if cells containing the rtk were exposed to the antibody, would you expect the kinase to be activated, inactivated, or unaffected? explain

The correct answer is - one of three outcomes takes place activation, inactivation and unaffected.

Explanation:

When cells expressing a particular RTK have come in touch with an antibody that binds itself to RTK one of three outcomes takes place; antibody can cause activation, may block activation or did not affect RTK.  

Activation - identical antigen-binding sites or domains of an antigen so that possibly bind a receptor site and leads to dimerization of the RTKs.

Block activation - Blocking of activation could be possible somehow by antigen.

No effect - the antibody could bind anywhere other than a domain that does not affect dimerization.

Thus, the correct answer is - one of three outcomes takes place activation, inactivation and unaffected.

prophase: we can observe the chromosomes to coil up and condense. they become visible. nuclear membrane and envelope disintigrate.s

metaphase: chromosomes align at the center, the metaphase plate. spindle fibers attach to centromeres of the sister chromatids. they meet at kinetochores.

anaphase: sister chromatids are pulled towards each opposing centromere, set on different poles.

telophase: chromosomes are now clustered up only on either sides of the cell. nuclear membranes reform, and a new cell wall forms along the cell plate. this will lead to cytokinesis, the process that divides the cell membrane and forms the cell wall.