Which of the following statement is correct about mechanical block to polyspermy?

TLS Online TPP Program

#Question id: 33391

#Unit 1. Molecules and their Interaction Relevant to Biology

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. Molecules and their Interaction Relevant to Biology

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. Molecules and their Interaction Relevant to Biology

In case of Beta Hairpin

TLS Online TPP Program

#Question id: 33394

#Unit 1. Molecules and their Interaction Relevant to Biology

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

TLS Online TPP Program

#Question id: 33395

#Unit 1. Molecules and their Interaction Relevant to Biology

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. Molecules and their Interaction Relevant to Biology

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