Which amino acid is ideal for the transfer of protons within the catalytic site of enzymes due to the presence of significant amounts of both the protonated and deprotonated forms of its side chain at biological pH?

TLS Online TPP Program

#Question id: 33391

#Unit 1. Structure and Function of Biomolecules

α-Turn 

a. Consists of 5 amino acids, generally termed as i, 1+1, i+2, i+3 and i+4. 

b. H-bond is seen between i and i+4 (First and Fifth residue).

c. The conformation of i+1, i+2 and i+3 are crucial

TLS Online TPP Program

#Question id: 33392

#Unit 1. Structure and Function of Biomolecules

For γ-Turns, which is of the following statement is correct

a. Consists of 5 amino acids

b. H-bond is seen between i and i+3

c. The conformation of i+1 is crucial 

d. dihedral angles of residue i+1 are (70, -60)

which is of the following statements are correct

TLS Online TPP Program

#Question id: 33393

#Unit 1. Structure and Function of Biomolecules

In case of Beta Hairpin

TLS Online TPP Program

#Question id: 33394

#Unit 1. Structure and Function of Biomolecules

For Helix-turn-Helix, which of the following is correct

TLS Online TPP Program

#Question id: 33395

#Unit 1. Structure and Function of Biomolecules

Which of the following is correct for Zinc Finger Motif 

a. Zinc atom stabilizes the structure / fold by coordination bonds. 

b. Each motif contains about 30-50 amino acids.

c. Contains regular patterns of Cys / His, which coordinate with Zinc atom.

TLS Online TPP Program

#Question id: 33396

#Unit 1. Structure and Function of Biomolecules

In case of Coiled-coils 

a. Alpha-helices are packed together through the charged interactions only

b. They have heptad repeated sequences.

c. 3.6 aa / turn and 5.2A for a helix. 

d. abcdefg 'a' &'d’ are hydrophobic residues 'e' and 'g' are found to be charged amino.

Which of the following is correct