Transcript 24FLtRNARole

FL #24 tRNA’s Role in
Protein Synthesis
DNA Double
Helix
Single
Stranded
RNA
DNA & RNA Standard 4A
Know the general pathway by
which ribosomes synthesize
proteins, using tRNAs to
translate genetic information in
mRNA.
Translation
Translation
Different
Hyperlink #2
tRNA Molecules
The Genetic Code
Translation
It is the job of the ribosomes to
read the mRNA so that the
correct sequence and number of
amino acids are assembled into
the proper proteins. This
decoding of mRNA message
into a polypeptide chain
(protein) is called translation.
Click on video camera
for translation of a
protein from mRNA.
The Genetic Code
The genetic code is read three
nitrogenous bases at a time, so
that each “word” of the coded
message is three bases long.
Each three-letter “word” in
mRNA is known as a codon.
The tRNA anticodon is
complementary to the
mRNA codon. In the case of
the tRNA molecule for
methionine, the anticodon bases
are UAC, which pair with the
methionine codon, AUG, The
ribosome has a second binding
site for a tRNA molecule for the
next codon.
Click on video camera
for translation of a
protein from mRNA.
1. Which type of RNA functions
as the blueprint of the genetic
code?
A. rRNA
B. tRNA
C. nRNA
D. mRNA
2. (DNA & RNA Standard 4a)
What happens during the
process of translation?
A. Messenger RNA is made from DNA
B. The cell uses information from mRNA
to produce proteins.
C. tRNA is made from mRNA
D. Copies of DNA molecules are made
3. Which type of RNA codes for
a single amino acid?
A. rRNA
B. tRNA
tRNA
C. nRNA
D. mRNA
4. What part of the tRNA codes
for that specific single amino
acid?
A. codon
B. tRNA
C. anticodon
D. mRNA
5. The anticodon CAG is
complementary to this codon?
A. CTU
B. GUC
C. GCG
D. ATA
6. During translation, the type
of amino acid that is added to
the growing polypeptide,
depends on the?
A. codon on mRNA
B. anticodon on the mRNA
C. anticodon on tRNA &
..codon
on mRNA
mRNA
codon on
D. rRNA
A
B
C
7. Which type of RNA above
contains the code for
assembling amino acids in
correct sequence?
A.
B.
C.
D.