1. Transcription & Translation Worksheet

2. 1. DNA: TAC TGA TCG ACC CCC ATA ATG AAA ATC
mRNA: AUG ACU AGC UGG GGG UAU UAC UUU UAG
tRNA: UAC UGA UCG ACC CCC AUA AUG AAA AUC
AA: START THR SER TRY GLY TYR TYR PHE STOP

3. 2. DNA : TAC CGC TCC GCC GTC GAC AAT ACC ACT
mRNA: AUG GCG AGG CGG CAG CUG UUA UGG UGA
tRNA : UAC CGC UCC GCC GUC GAC AAU ACC ACU
AA: START ALA ARG ARG GLU LEU LEU TRY STOP

4. 3. DNA : TAC CAC CCC CGT ATG GCT GGG AAT ATC
mRNA: AUG GUG GGG GCA UAC CGA CCC UUA UAG
tRNA : UAC CAC CCC CGU AUG GCU GGG AAU AUC
AA: START VAL GLY ALA TYR ARG PRO LEU STOP

5. 4. DNA : TAC GCA CCA AAA AAG TAC CAA CCG ACT
mRNA: AUG CGU GGU UUU UUC AUG GUU GGC UGA
tRNA : UAC GCA CCA AAA AAG UAC CAA CCG ACU
AA: MET ARG GLY PHE PHE MET VAL GLY STOP

6. 5. DNA : TAC CTC ACA CTA CGT ATG TTG GGA ATT
mRNA: AUG GAG UGU GAU GCA UAC AAC CCU UAA
tRNA : UAC CUC ACA CUA CGU AUG UUG GGA AUU
AA: MET GLU CYS ASP ALA TYR ASG PRO STOP

7. 6. What are the three differences between RNA and DNA?
single stranded
ribose sugar
nitrogen base uracil
double stranded
deoxyribose sugar
nitogen base thymine

8. 7. Where is DNA found in the cell? Where is RNA found in the cell?
nucleus
mitochondria/chloroplasts
cytosol during mitosis/meiosis
mRNA = nucleus or cytoplasm
tRNA = nucleus or cytoplasm
rRNA = within the nucleolus of the nucleus or the ribosomes of the cytoplasm

9. 8. Name the three types of RNA and what they do.
mRNA = carries the message of DNA out of the nucleus & into the cytoplasm.
rRNA = a structural component of a ribosome
tRNA = delivers amino acids to the growing polypeptide chain

10. 9. Draw an mRNA strand that is complementary to the DNA strand AATTGC.
UUA ACG

11. 10. What are the steps of transcription?
1. A portion (gene) of the DNA double helix unzips. 2. RNA polymerase uses one of the DNA strands as a template to assemble the complementary nucleotides of mRNA. 3. When transcription is over, the completed mRNA molecule leaves the nucleus through a nuclear pore so translation can take place. 4. The DNA double helix zips back together.