DNA with a Higher G + C Content Is More

question 86

Multiple Choice

DNA with a higher G + C content is more stable at high temperatures than DNA with a high A + T content. Why?

• A) G and C fit together better than A and T.
• B) The two chains assume a parallel orientation when the A + T content is higher.
• C) The negative charge on the phosphates in the backbone is partially neutralized in DNA with a higher G + C content.
• D) The hydrophobic interactions between G and C are stronger than those between A and T.
• E) G and C form three hydrogen bonds and A and T, just two.

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Definitions:

Stereochemical Configuration

The spatial arrangement of atoms in a molecule, determining its geometric structure and influencing its chemical properties and reactivity.

D-Threonine

One enantiomer of the amino acid threonine, characterized by its specific spatial arrangement of atoms, which is important in biochemistry and molecular biology.

Enantiomer

Molecules that are mirror images of each other but cannot be superimposed onto each other, usually involving chiral centers.

Molecule

The tiniest unit of a chemical substance that maintains both the substance's composition and its chemical characteristics, and can exist on its own.