Suppose that the number of bird species is determined mainly by the number of vertical strata found in the environment. If so, in which of the following biomes would you find the greatest number of bird species?

TLS Online TPP Program

#Question id: 1671

#Unit 4. Cell Communication and Cell Signaling

A chromosome on which T-cell receptor α chain gene rearrangement has occurred lacks which of the following gene segments?

TLS Online TPP Program

#Question id: 1672

#Unit 4. Cell Communication and Cell Signaling

Using only random VDJ recombination, from 40 V, 23 D, and 6 J gene segments, what are the number of possible variable regions of an antigen receptor molecule?

TLS Online TPP Program

#Question id: 1673

#Unit 4. Cell Communication and Cell Signaling

N-region insertion is associated with the expression of:

TLS Online TPP Program

#Question id: 1674

#Unit 4. Cell Communication and Cell Signaling

Which of the following statements is TRUE of receptor editing?

TLS Online TPP Program

#Question id: 1675

#Unit 4. Cell Communication and Cell Signaling

Somatic hypermutation of V genes:

TLS Online TPP Program

#Question id: 1676

#Unit 4. Cell Communication and Cell Signaling

NK cells lack receptors with: