In α-helix of protein and the double helix of DNA, the units that repeat in the backbone of the polymer chain has to be compared. Concept Introduction: The proteins are the polymers which are made up of the amino acids. The amino acids are linked together by peptide bonds. The DNA molecule is also a polymer which is made up of nucleic acids . The nucleic acids are made of nucleotides . The nucleotides contains nitrogen base, sugar molecule and phosphate ion. The nucleotides are linked by phosphodiester bonds to form the nucleic acid.

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Chapter 28, Problem 28.20P

(a)

Interpretation Introduction

Interpretation:

In α-helix of protein and the double helix of DNA, the units that repeat in the backbone of the polymer chain has to be compared.

Concept Introduction:

The proteins are the polymers which are made up of the amino acids. The amino acids are linked together by peptide bonds.

The DNA molecule is also a polymer which is made up of nucleic acids. The nucleic acids are made of nucleotides. The nucleotides contains nitrogen base, sugar molecule and phosphate ion. The nucleotides are linked by phosphodiester bonds to form the nucleic acid.

(b)

Interpretation Introduction

Interpretation:

In α-helix of protein and the double helix of DNA, the projection of substituents in space along the backbone relative to the axis of the helix has to be compared.

Concept Introduction:

The proteins are the polymers which are made up of the amino acids. The amino acids are linked together by peptide bonds.

The DNA molecule is also a polymer which is made up of nucleic acids. The nucleic acids are made of nucleotides. The nucleotides contains nitrogen base, sugar molecule and phosphate ion. The nucleotides are linked by phosphodiester bonds to form the nucleic acid.

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