The yeast two-hybrid system can be used to identify

a. proteins that interact with a known or “bait” protein.

b. proteins that interact with a “fish” domain.

c. cDNAs that encode interacting proteins.

d. co-activators and co-repressors.

TLS Online TPP Program

#Question id: 33401

#Unit 1. Molecules and their Interaction Relevant to Biology

Four-bladed B propeller of Collagenase is made of 

TLS Online TPP Program

#Question id: 33402

#Unit 1. Molecules and their Interaction Relevant to Biology

A series of βαβ loops arranged so that the  strands form a barrel creates a particularly stable and common motif called as

TLS Online TPP Program

#Question id: 33403

#Unit 1. Molecules and their Interaction Relevant to Biology

Which amino acid has largest allowed region in Ramachandran plot but has least acceptability to support secondary structure formation?

TLS Online TPP Program

#Question id: 33404

#Unit 1. Molecules and their Interaction Relevant to Biology

The crystal structural  of a peptide has an ordered structural repeat of amino acids with a distance of ~ 6.5 A between the alternate Ca atoms. Which one of the following pair of dihedral angles accurately represents the peptide structural ?

TLS Online TPP Program

#Question id: 33405

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one of the following defines the psi angle in the  protein backbone?

TLS Online TPP Program

#Question id: 33406

#Unit 1. Molecules and their Interaction Relevant to Biology

If  Phi is fixed at 0º, then which of the following is correct 

a. Clashes occur at ALL Psi angles. 

b. Phi = 0º is physically impossible.

c. Clashes occurs at +10º to -130º

d. Clashes occurs at -90º to -180º