Because of steric constraints, purines in purine nucleotides are restricted to two stable conformations with respect to deoxyribose, called syn and anti.

            

The two molecules shown in the figures are best described as

TLS Online TPP Program

#Question id: 1724

#XL - Q Biochemistry

Which of the following statements is the single best defining characteristic of a follicular dendritic cell (FDC)?

TLS Online TPP Program

#Question id: 1725

#XL - Q Biochemistry

What is the single cell type most characteristically associated with the mucosa-associated lymphoid tissue (MALT)?

TLS Online TPP Program

#Question id: 1726

#XL - Q Biochemistry

What is CD8 a marker of?

TLS Online TPP Program

#Question id: 1727

#XL - Q Biochemistry

Which of the following statements is TRUE of CD4?

TLS Online TPP Program

#Question id: 1728

#XL - Q Biochemistry

Which of the following is characteristic of B- but not T-cells?

TLS Online TPP Program

#Question id: 1729

#XL - Q Biochemistry

When a resting naive T-cell engages its specific MHC–peptide complex displayed on the surface of a fibroblast, it: