A mutated strain of E. coli replicates DNA normally at 25°C, but replication stops immediately when the temperature is raised to 37°C. Which protein is likely to be non-functional at the higher temperature?

TLS Online TPP Program

#Question id: 171

#Section 2: General Biology

An amino acid with two chiral carbon atoms

TLS Online TPP Program

#Question id: 172

#Section 2: General Biology

Which amino acid is least likely to participate in acid-base catalysis?

TLS Online TPP Program

#Question id: 174

#Section 2: General Biology

What is the net charge on the dipeptide Arg-Pro at pH 9.0? The table below gives the pKaʹs of the ionizable groups on the free amino acids.

TLS Online TPP Program

#Question id: 175

#Section 2: General Biology

The ionic charges associated with a protein molecule are ________.

TLS Online TPP Program

#Question id: 176

#Section 2: General Biology

A peptide has the sequence Glu–His–Trp–Ser–Gly–Leu–Arg–Pro–Gly. What is the net charge of the molecule at pH 3

TLS Online TPP Program

#Question id: 178

#Section 2: General Biology

Given the pKa values of different acidic sites in cysteine, the principal ionic form which will never exist at any pH