9 Which of the following structural domains are often respon

9. Which of the following structural domains are often responsible for DNA binding?

1. bHLH 2. leucine zipper             3. zinc finger      4. homeodomain

a. 1, 2, 3, and 4              b. 2, 3, and 4     c. 1, 3, and 4     d. 1, 2, and 4

Solution

The correct answer will be: A. 1, 2,3 and 4.

These motifs Leucine zipper, Zinc finger and Homeodomain , are present in the DNA binding.

Helix loop helix are like helix loop helix are havinf alpha helical turns which helps in DNA binding.Zn finger binds in the groove of the DNA and stabilizes binding.