CHAPTER 21. NUCLEIC ACIDS AND PROTEIN SYNTHESIS. What Role Do Nucleic Acids Play?. DNA Contained in cell nucleus All information needed for the development of a complete living system Every time a cell divides, cell’s DNA is copied and passed to the new cells. RNA
NUCLEIC ACIDS AND PROTEIN SYNTHESIS
Nitrogenous Base Structures
“Tide contains phosphates!”
Adenine + deoxyribose = deoxyadenosine
Naming nucleosides of the other bases follows the same pattern.
Naming nucleotides: nucleoside name followed by
ex. Adenosine 5’-monophosphate (AMP) or deoxyadenosine 5’-monophosphate (dAMP)
Nucleoside -- “phosphate” not part of the name
Nucleotide -- “phosphate” is part of the name
Phosphodiester bond formation
What might this suggest?
DNA Double Helix
For the following mRNA sequence:
If a mutation changes UCA to ACA, what happens to the protein?
What happens if the first U is removed from the sequence?