The Two Strands of the Double Helix of DNA Are

question 56

Multiple Choice

The two strands of the double helix of DNA are held together by ________.

• A)hydrogen bonds
• B)covalent bonds
• C)dipole-dipole interactions
• D)ionic bonds
• E)sugar-to-phosphate bonds

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Definitions:

Ethane

A colorless, odorless gas that is the second simplest alkane, consisting of two carbon atoms and six hydrogen atoms.

Double Bonds

Chemical bonds between two atoms involving four bonding electrons instead of the usual two, making the bond stronger and the structure more rigid.

Lewis Structure

A graphical representation of the valence electrons of atoms within a molecule, showing how they are arranged and shared to form bonds.

Chloromethane

A colorless, flammable gas with a faintly sweet odor, used in the production of silicones.