COMPARING RNA & DNA
Biology CP – Phyllis Smith
Comparing RNA & DNA
DNA
RNA
Nucleotide
X
X
X
Deoxyribose
Ribose
Singlestranded
Doublestranded
Nitrogenous
bases
X
X
X
X
X
Comparing RNA & DNA
DNA
Thymine
RNA
X
Uracil
Template for synthesis of
nucleic acid
Double helix
Replication
Transcription
X
X
X
X
X
X
Comparing RNA & DNA
DNA
Exact Copy
RNA
X
Messenger
More Than 1
Form
Found in
Nucleus
Leaves
Nucleus
Does not
Leave
X
X
X
X
X
X
Interpreting Diagrams: Understanding the
Main Ideas
DNA codon
AAA
GTC
CCT
TAC
mRNA codon tRNA Anticodon
UUU
CAG
AAA
GUC
GGA
CCU
AUG
UAC
GAT
CUA
CAC
GUG
GAU
CAC
Amino Acid
Phenylalanine
Glutamine
Glycine
Methionine
Leucine
Valine
13.1 AND 13.2
RNA synthesis
Transcription:
 Similar





to DNA Replication
1. DNA DOUBLE HELIX Unwinds
2. DNA DOUBLE HELIX Unzips
3. RNA Polymerase uses 1 STRAND to create mRNA
Use Promoters – tell the RNA polymerase where to
stop and where to end
KEY DIFFERENCE: Only uses one strand from
parental DNA
NOT BOTH!
INTRONS and EXONS

Pre –mRNA must be edited
2 types of RNA

mRNA = messenger RNA

tRNA = transfer RNA

Same rules of pairing for both mRNA and tRNA
 How
are the base pairing rules different from DNA?
DNA or RNA?

CCC – GGG
DNA, RNA, or Both?

CAT – GUA DNA, RNA, or Both?

UUU – AAA

TGC – ACG DNA, RNA, or Both?
DNA, RNA, or Both?
The Genetic Code


Nucleotides bases = A, C, G, T (U in RNA)
Codon
3

nucleotide bases (or letters) = 1 word
Letters of RNA: A, C, G, and U
U
=?
 U pairs with ?