Unit 4 - Genetic information, variation and relationships between organisms
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RNA & Protein Synthesis
-
-
- -
• Both mRNA and tRNA are involved in the process of protein synthesis .
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① I'm!9%%iaHhe
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Rna nucleotide
I 3 end
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-
B C
←
amino acid
site
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c.
A
binding
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I
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.
e.
Sugar AEU
/
D-
104 [T
UEA
loop
U -
c A
( -
i
' to
↳AcG
a
µ Hydrogen bonds
↳ €81
CE0 between base
pairs
mRNA the code from the DNA
carries
genetic
•
④
GEC
to the ribosomes , where it's used to make a
protein A anticodon
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¥
[
during translation .
loop
U y
•
mRNA codons of three adjacent bases
are
groups .
GAA
-
( also called base triplets / triplets) anti codon
tRNA that
1apton
.
carries the amino acids are used to make
proteins
to the ribosomes .
strand folded
ERNA is a
single poly nucleotide that 's into a
•
•
In transcription mRNA of is made clover shape
gene
: a
an
copy
.
from DNA .
.
Hydrogen bonds between specific base
pairs
hold the molecule
•
Transcription takes place in the nucleus in
eukaryotic in this shape .
Cells and
cytoplasm in
prokaryotes Every tRNA molecule has a
specific sequence of three
•
.
bases at one end called an anti codon .
① RNA polymerase attaches to the DNA
- RNA polymerase
anti sense strand
"
↳ E-
-
"
:* ::÷::÷:÷:÷¥::÷"
"
a
Hydrogen bonds between the two DNA strands
-
=
in the break separating the strands I
gene , .
-
One of the strands is then used as a
template to
make an mRNA copy .
ZA.org/ementarymRNAisformed--
-
complementary phosphodiester
strand
sense E bond
to
::÷÷÷::::÷:÷::÷:L
.
a
'
)
'
strand 13 -5
template .
=
µ
,
•
RNA nucleotides are joined to adjacent nucleotides I ↳ A
Free RNA
by phosphodiester bonds to form the mRNA strand .
nucleotides
•
mRNA strand becomes a complementary copy of the DNA
anti sense -
template strand .
( base T replaced by U in RNA )
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