Download Complete the blank spaces in the following chart:

Codon Practice
NAME:______________________
Part A: Circle the correct choice within the parenthesis for 1-8.
1. (DNA/RNA) can leave the nucleus.
2. mRNA is made during (transcription/translation).
3. mRNA is made in the (cytoplasm/nucleus).
4. DNA is located in the (nucleus/cytoplasm)
5. (Translation/Transcription) converts DNA into mRNA.
6. (mRNA/rRNA) is used to carry the genetic code from DNA to the ribosomes.
7. (DNA/RNA) uses uracil instead of thymine.
8. Transcription takes place in the (nucleus/cytoplasm).
Part B: Complete the blank spaces in the following chart then answer the questions that follow.
1.
DNA
mRNA
A
U
G
U
G
G
A
A
C
G
U
A
A
U
U
U
A
A
Amino Acid
2. Assume that the base in position 6 of the original DNA strand mutates to an "A." How will the sequence be
affected?
3. If the base in position 6 is changed to a "T," how will the sequence be affected?
4. If the base sequence of a strand of DNA is 3’ TTCCGTGGA 5’. Then the corresponding strand of mRNA is
_________________.
5. A certain mRNA molecule has the following sequence:
5’ G G U A U C C C G A U U 3’
A. What is the amino acid sequence? ___________________________________________
6. If a certain gene contains 1,500 nucleotides, what is the maximum number of amino acids that it will be coded
for? _________________________
7. If a second gene contains 3000 nucleotides, what is the maximum number of amino acids that it will be coded for?
______________________
8. Complete the chart:
DNA
codon
mRNA
codon
Amino Acid
AAA
UUU
PHE
TTA
MET (start codon)
CCG
GTC
GUA
TRY
TGT
UAG
9. Given the DNA code TACCGCTTT, what would the mRNA code be?
How many codons are there from the start to the stop codons? _______________
What are the codons? ______________________________________________________
What are the amino acids? __________________________________________________
10. Given the DNA code TACATAGGTATC, what would the mRNA code be?
How many codons are there the start to the stop codons? _______________
What are the codons? ______________________________________________________
What are the amino acids? __________________________________________________