1.

Which of the following are the structural motifs that mediate protein-protein interactions?(a) Leucine zipper and basic helix-loop-helix(b) Homeodomain(c) Zinc finger(d) Helix-turn-helix

Answer» The correct choice is (a) Leucine zipper and basic helix-loop-helix

The explanation: Regulatory proteins contain domains not only for DNA binding but also for protein-protein interactions. Homeodomain, zinc finger and helix-turn-helix are DNA-binding domains.


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