1. Which of the following statements best describes the arrangement of the bases
ID: 706207 • Letter: 1
Question
1. Which of the following statements best describes the arrangement of the bases?
a. Which of the following statements best describes the location of the water molecules in the crystal structure of the DNA double helix? [Hint: make the water molecules visible and color the DNA atoms and bonds gray.]
b. When compared to the phosphodiester backbone, the interior of the double helix is ________.
c. Crystallographic studies indicate H2O #91 (B 91 HOH) is hydrogen-bonded to the double helix. Which of the following atoms could serve as the hydrogen bond acceptor for this noncovalent interaction?
d. The hydrogen bond involving H2O #91 is located in the _____________ of the double helix.
1. Which of the following statements best describes the arrangement of the bases?
The bases make up the backbone of the DNA double helix. The bases point towards the outside of the double helix. The bases point towards each other on the inside of the double helix in a perpendicular orientation. The bases point towards each other on the inside of the double helix in a roughly parallel orientation.Explanation / Answer
Ans 1 : The bases point towards each other on the inside of the double helix in a roughly parallel orientation.
The DNA is deoxy ribonucleic acid. It basically has 3 components : nitrogenous bases , deoxyribose sugar and phosphate.
The backbone of the DNA molecule is made up of sugar-phosphate molecules and the bases point inside which are complimentary paired.
The two strands run antiparallel to each other.
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