A short video review.

Carbohydrates

Lipids

Proteins

Nucleic Acids


Function in the body
 Store & transmit hereditary or genetic information

Building Blocks


Nucleotides – the building blocks of nucleic acids
Nucleotides have 3 parts:
 5-carbon sugar


A phosphate group
 Sugar and phosphate are held together by strong covalent bonds
A nitrogenous (nitrogen-containing) base
(adenine, thymine, cytocine, guanine)
 Bases are held together by weak hydrogen bonds.

Check for Understanding #1
 The diagram below represents a portion of a nucleic acid molecule. The part indicated by arrow X could be
 1 adenine
 2 ribose
 3 deoxyribose
 4 phosphate

Nucleic Acids Video

Check for Understanding #2
 The weakest bonds in a double-stranded molecule of deoxyribonucleic acid exist between the
 (1) deoxyribose sugars
 (2) phosphate groups
 (3) nitrogenous bases
 (4) 5-carbon sugars

Examples
 Ribonucleic Acid
(RNA)
 Deoxyribonucleic
Acid (DNA)

Check for Understanding #3
 One similarity between DNA and RNA molecules is that they both contain
 1 the same sugar
 2 genetic codes based on sequences of bases
 3 a nitrogenous base known as uracil
 4 double-stranded polymers