Macromolecules

Macromolecules

Key Terms!

Macromolecules

Macromolecule: a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.

Polymer: A polymer is a substance or material consisting of very large molecules, or macromolecules.

Monomer: a molecule that can be bonded to other identical molecules to form a polymer.

Poll

Polymers contain...

• Many pieces

• Only one piece

Cellulose

an insoluble substance which is the main material of plant cell walls and of vegetable fibers such as cotton.

Insoluble = does not dissolve in water

Multiple Choice

Cellulose makes up plant cell walls, and is

• soluble

• insoluble

Hydrogen and Covalent Bonds

Hydrogen Bond: a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.

Covalent Bond: the bond formed by the sharing of a pair of electrons by two atoms.

Multiple Choice

A covalent bond is formed by two atoms sharing a...

• electron

• a pair of electrons

Single and Double Bonds

Covalent bonds that share electrons.

Single bond: 2 atoms share a pair of electrons

Double Bond: 2 atoms share 2 pairs of electrons

Poll

A single bond has how many electrons shared?

• 1

• 2

• 3

• 4

Water Molecule

A water molecule consists of two atoms of hydrogen linked by covalent bonds to the same atom of oxygen.