If  Phi is fixed at 0º, then which of the following is correct 

a. Clashes occur at ALL Psi angles. 

b. Phi = 0º is physically impossible.

c. Clashes occurs at +10º to -130º

d. Clashes occurs at -90º to -180º

TLS Online TPP Program

#Question id: 1987

#Unit 4. Cell Communication and Cell Signaling

A nonfunctional CD4 protein on a helper T cell would result in the helper T cell being unable to

TLS Online TPP Program

#Question id: 1988

#Unit 4. Cell Communication and Cell Signaling

What are CD4 and CD8?

TLS Online TPP Program

#Question id: 1989

#Unit 4. Cell Communication and Cell Signaling

Which of the following are T cells of the immune system?

TLS Online TPP Program

#Question id: 1990

#Unit 4. Cell Communication and Cell Signaling

B cells interacting with helper T cells are stimulated to differentiate when

TLS Online TPP Program

#Question id: 1991

#Unit 4. Cell Communication and Cell Signaling

Why can normal immune responses be described as polyclonal?

TLS Online TPP Program

#Question id: 1992

#Unit 4. Cell Communication and Cell Signaling

How do antibodies of the different classes IgM, IgG, IgA, IgD, and IgE differ from each other ?