Nucleic acids • • • Store and transmit genetic information Made of C, H, O, N, and Phosphorus Two types: a. Deoxyribonucleic acid (DNA-double helix) b. Ribonucleic acid (RNA-single strand) • Nucleic acids are composed of long chains of nucleotides linked by dehydration synthesis 2
Nucleic Acids C, H, O, N, P *Monomer: nucleotide *Function: They make up the genes which provide the basic blueprint of life. They direct your growth and development by dictating protein structure. *Examples: DNA and RNA **Nucleic acids are the largest biological molecules in the body. 3
Nucleic acids • Nucleotides have three parts: 1. phosphate group 2. pentose sugar (5 -carbon) 3. nitrogenous (nitrogen-containing) bases: 1. adenine (A) 2. thymine (T) DNA only 3. uracil (U) RNA only 4. cytosine (C) 5. guanine (G) 4
Nucleotide 5
DNA makes proteins – how one organic molecule makes another The genetic material that organisms inherit from their parents consists of DNA. Within the DNA are genes Genes determine the specific 3 -D structures of proteins, proteins and therefore the functions of the proteins. **Through the actions of proteins, DNA ** controls the life of the cell and the organism. ** 6
How many nucleotides? 7
DNA vs RNA deoxyribose Double strand single strand 8
DNA vs RNA Adenine pairs with thymine Nucleus only Adenine pairs with uracil nucleus and cytoplasm 9
5 DNA double helix O 3 3 P 5 O O C G 1 P 5 3 2 4 4 2 3 P 1 T 5 A P 3 O O P 5 O 3 5 P 10