Republic of the Philippines
Department of Education
DIVISION OF CAPIZ
Banica, Roxas City
Tel. No./Fax No. (036) 6210974
E-mail: capiz@deped.gov.ph | http://depedcapiz.ph
Name Period:
DNA Base Pairing Worksheet
By; FREZEL D. EJEMPLAR
There are base pairing rules for writing complimentary DNA strands for a given strand.
A pairs with T
C pairs with G
In RNA, A pairs with U, instead of T.
Write the complimentary DNA strand for each given strand of DNA.
1. CGTAAGCGCTAATTA
2. TCTTAAATGATCGATC
3. AATGAATAGCTAGCTT
4. GGCATTCGCGATCATG
5. CGTTAGCATGCTTCAT
6. ACTAACGGTAGCTAGC
Now write the mRNA strand for the given DNA strand.
7. ATGTCGCTGATACTGT
8. GAAGCGATCAGTTACG
9. AATGAATAGCTAGCTT
10. GGCATTCGCGATCATG
Republic of the Philippines
Department of Education
DIVISION OF CAPIZ
Banica, Roxas City
Tel. No./Fax No. (036) 6210974
E-mail: capiz@deped.gov.ph | http://depedcapiz.ph
Write the tRNA sequence for the given strand of mRNA
11. AGGUCAUGCAUGGGCAUGCAU
12.AGAGAUUCAGCUAGCACGAUA
13.GUCAUCGAUCGAUCGGAUGCC
14.UUUCAGUCAGCUAGCGAUCGU
Now you will translate the amino acid sequence for the given tRNA strand. Remember that
codons are 3 base pairs long.
A. AUG CAC UGU CCU UUC GCU GAC
B. GAG AUC UGG UUG GAA UCG
C. AGC GUA UUA ACG UAU CAU
D. AGU CGA UCG AUG CGG AUG AUA
E. GUC GUC GAU AGC UAU CAU GCA
Republic of the Philippines
Department of Education
DIVISION OF CAPIZ
Banica, Roxas City
Tel. No./Fax No. (036) 6210974
E-mail: capiz@deped.gov.ph | http://depedcapiz.ph
Transcribe the following DNA strand. Then translate the tRNA strand you wrote.
F. TGAGTCGACTGGCTGACCGTAGAC
G. CTTGGCTTATGGTGGTTCGCTCG
The following are pieces of mRNA. Give the DNA strand from which it was transcribed.
A. GAGAUCUGGUUGGAAUCG
B. AGCGUAUUAACGUAUCAU
Republic of the Philippines
Department of Education
DIVISION OF CAPIZ
Banica, Roxas City
Tel. No./Fax No. (036) 6210974
E-mail: capiz@deped.gov.ph | http://depedcapiz.ph
Complete the table below showing the sequences of DNA, mRNA codons, tRNA anticodons and the amino
acids. Remember the genetic code is based on mRNA codons.
DNA
1. 2. GAT 3.
mRNA codon
UAU
4. 5. 6.
tRNA
anticodon
7. UUC 8. 9.
Amino Acid
Tryptophan 10. 11. 12.
Republic of the Philippines
Department of Education
DIVISION OF CAPIZ
Banica, Roxas City
Tel. No./Fax No. (036) 6210974
E-mail: capiz@deped.gov.ph | http://depedcapiz.ph
1. Using the following piece of DNA, give the mRNA molecule and the amino
acid sequence for which it codes.
DNA- A T A T A A A C G A G G A A A T T C C G G G C G
mRNA
tRNA
Amino
acids:
2. Use the mRNA sequence to find the DNA sequence and the amino acid sequence.
DNA
mRNA- AUGCCUACAUGUGGUGUAACCUUA
tRNA
Amino
acids
For each codon below, give the tRNA anticodon.
3. UUC 4. AUC
5. CCG 6. CGU
7. Give all the possible Anti-codons for the amino acids listed below. (Use page 244 in
your text).
Histidine (His)
Isoleucine (Ile)
Arginine (Arg)
Tryptophan (Trp)
