Practice Questions

TLS Online TPP Program

#Question id: 150

How do the pKa values of an ionizable side chain compare when the amino acid is free versus when it is in a polypeptide chain?

#Section 2: General Biology

The pKa of the side chain is independent of whether the amino acid is in a polypeptide chain or is free.
The pKa of the side chain is always lower for the free amino acid.
The pKa of the side chain may be lower or higher in a polypeptide chain due to weaker inductive effects and differences in their microenvironments.
The pKa of the side chain is usually higher in a polypeptide chain due to stabilization from nearby residues in the three-dimensional structure.

More Questions

TLS Online TPP Program

#Question id: 4731

#Section 3: Genetics, Cellular and Molecular Biology

A pure-breeding strain of squash that produced disk-shaped fruits was crossed with a pure breeding strain having long fruits. The F1 had disk fruits, but the F2 showed a new phenotype, sphere, and was composed of the following proportions

Disk 384

Sphere 96

Long 32

What is reason for F2 phenotype?

TLS Online TPP Program

#Question id: 15788

#Section 1: Engineering Mathematics

If w is a non-real root of the equation x²- 1 = 0. then

TLS Online TPP Program

#Question id: 14639

#Section 1: Engineering Mathematics

The maximum of f(x) = (x + 2)/(x -1) is