A single molecule of DNA may contain billions of nucleotides.

Hydrogen Bonds. Two hydrogen atoms join together to form a molecule of hydrogen gas. Hydrogen bonds play an important role in biochemistry and produce many of the unique properties of water. Which of the following is not a result of hydrogen bonds? c. Two strands of DNA are linked together taking a shape similar to a ladder.

These are a phosphate group, a deoxyribose sugar, and a nitrogenous base. These four nucleotides repeat several times in a DNA. POLAR COVALENT BONDS In a Polar Covalent bond, electrons are shared. Covalent bonds form when two atoms share electrons. The covalent bonds are intramolecular bonds because they hold the atoms together in a single molecule. Each nucleotide consists of three main parts.
Hydrogen bonds are especially strong intermolecular forces. A hydrogen bond is weaker than an ionic bond or a covalent bond, but stronger than van der Waals forces. Unequal sharing of electrons results in polar bonds. In Polar Covalent bonds, the electrons are located closer to one atom than the other. Thus AT makes 2 hydrogen bonds.

Hydrogen bonds also form same way between C and G, however here there's 3 hydrogen bonds. Each monomer unit of the DNA is called a nucleotide. Covalent bonds is formed on the sugarbackbone of the DNA, where the phosodiester makes covalent bonds with the … The spectacular changes of the ν s band of an X–H molecule upon establishment of an H-bond are now fairly well understood. A localised covalent bond occurs between two atoms and is where an electron from each atom pairs, and a common wave function is generated that has boundary conditions determined by BOTH nuclei. However, there are only four nucleotides in a DNA. Hydrogen bonds may form between atoms within a molecule or between two separate molecules. But NOT equal sharing of those electrons. a. Covalent bond strengths range from 100 kJ/mol to 1100 kJ/mol. Some hair is straight, some wavy, and some very curly. A hydrogen bond (often informally abbreviated H-bond) is a partial intermolecular bonding interaction between a lone pair on an electron rich donor atom, particularly the second-row elements nitrogen (N), oxygen (O), or fluorine (F), and the antibonding molecular orbital of a bond between hydrogen (H) and a more electronegative atom or group. Covalent Bonds. d. An enzyme has a unique shape that allows it to bond only with specific molecules Publisher Summary. b.