Download TRANSCRIPTION and TRANSLATION

Name: ____________________________________ Date: _____________ Period: ____
TRANSCRIPTION and TRANSLATION
Transcription
Fill in the blanks below. Refer to the word bank.
1. Messenger RNA (mRNA) carries the instructions to make a particular ____________ from the
DNA in the _____________ to the ribosomes.
2. The process of producing mRNA from the instructions in the DNA is called _______________.
3. During transcription, the DNA molecule unwinds and separates, exposing the nitrogen bases.
Free RNA ____________ pair with the exposed bases. There is no _____________ (T) in
RNA. During transcription, ______________ (U) pairs with adenine (A) instead.
4. RNA contains the sugar ______________ instead of deoxyribose.
5. The mRNA molecule is completed by the formation of __________ between the RNA
_____________; and it then separates from the DNA. The mRNA molecule is a ___________
strand, unlike DNA.
Translation
Codons
Each combination of three nitrogenous bases on the mRNA molecules is a CODON, a three-letter
code word for a specific amino acid. The table below shows the mRNA codon for each amino acid. Use
the table to answer the questions below.
1. The codon for tryptophan is __________.
3. For leucine, there are ______ different codons.
2. The codon GAU is for ______________.
4. In a stop codon, if the second base is G, then
the first and third bases must be ___ and ___.