Describe the types of bonds within a water molecule and between

different water molecules.How/why are these bonds important?

- Polar covalent bonds: O is more electronegative than H, O is

on the top with 2hydrogens coming out on the bottom

- Hydrogen bonds: the slight positive charge on the H atom of one

water molecule attracts the slight negative charge on the O of a

neighboring water molecule—based onpolar covalent bonds

Class

of

Molec

ule

Building Blocks

(Monomers)

Bonds formed Functions and

examples

Lipids (fats) glycerol

long strand of H-C bonds

saturated is all single

bonds unsaturated is bent

with at least 1double bond

Storage for

energy,

components of

cell membranes,

fat soluble

vitamins

Nucleic Acids nucleotide

phosphate group, sugar

(pentagon), and

nitrogenous base-A,C,G,T

(in DNA) or U (in RNA)

Store and

transfer

genetic

information

Carbohydrat

es

Simple sugar

(monosacchar

ide)

Monosaccharide: one

hexagon, disaccharide: 2

hexagons, polysaccharides:

multiple hexagons

Provide the body

withenergy

Proteins Amino acid

Amino group on the left

(NH2 or NH3), carboxyl

on the right (COO or

COOH), R group in the

middle

Do most of the

workwithin the

cell