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Protein Synthesis Review Guide
3 Types of RNA
• ______________ = messenger RNA (MESSAGE)
• ______________ = transfer RNA (TAKES amino acids to growing protein chain)
• ______________ = ribosomal RNA (READS the mRNA message)
TRANSCRIPTION:
• ___________ made from 1 gene of DNA in the _________________
• The type of RNA made is called ________________ (messenger RNA) because it sends a message from DNA to the ____________________
• DNA safe in the nucleus ( uses _______ ( to send a message to the cytoplasm
Process of TRANSCRIPTION:
1. unzip one gene in DNA
2. match up bases to ___________ side of a gene in __________
3. mRNA detaches from the DNA
4. mRNA moves out of the _____________ to the _____________________
5. RNA polymerase adds new nucleotides
DNA: GAG AAC TAG TAC
mRNA: _____ _____ _____ _____
Remember ( A with U AND G with C
How does mRNA tell the cell what to do?
• mRNA is a message that codes for a __________________
• proteins are made in the __________________ and then work to keep the cell ALIVE!
• __________________ (protein synthesis): process of making a __________________________
• Proteins are made up of _______________ _________________ (small building blocks)
• There are 20 different types of amino acids
AMINO ACID CHART
|DNA |CAT |TAG |
|RNA | | |
|Amino | | |
|Acid | | |
|DNA |AAA |GGG |
|RNA | | |
|Amino | | |
|Acid | | |
Process of Translation:
1. mRNA moves out of ___________________ and into the _____________________
2. mRNA attaches to a ____________________________
3. transfer RNA (tRNA) decodes the mRNA and brings amino acids to build up the protein
4. the anticodon (3 bases on tRNA): matches up to codons on mRNA
5. protein (polypeptide chain of amino acids) detaches from the ___________________ and goes off to a work in the cell
DNA nucleus anticodon translation protein codon
amino acid mRNA tRNA ribosome transcription cytoplasm
|1. |This process is called |
|2. | |
|3. | |
|4. | |
| |This process is called |
| | |
|5. | |
|6. | |
|7. | |
|8. | |
|9. | |
|10. | |
1. ___________________________________
2. ___________________________________
3. ___________________________________
4. ___________________________________
-----------------------
Practice EOC Question:
The process in which part of the DNA nucleotide sequence is copied into a complementary sequence of RNA is
A. translation B. Replication
C. Transcription D. Reproduction
Amino Acid
Amino Acid
Amino Acid
PROTEIN
Practice EOC Questions
1. What structure is this and where was it originally transcribed?
A. mRNA, trancsribed in nucleus
B. tRNA, trancribed in nucleus
C. mRNA, transcribed in ribosome
D. tRNA, trancribe in ribosome
2. Where does protein synthesis take place:
A. nucleus B. cytoplasm
C. ribosome D. chloroplast
3. Which relationship is most similar to tRNA:
A. book; publisher B. truck; factory
C. key; lock D. baker; pie
4. What amino acids pair with the DNA sequence
CAG-TAG-CGA?
A. valine – isoleucine – glycine
B. valine – aspartic acid – alanine
C. valine – isoleucine – alanine
D. valine – phenylalanine – alanine
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