Question 1
This question REPLACES the Unit 6 Lesson 9 discussion.
This is worth 4 points of your total weekly recap quiz.
Please do your best, you have unlimited chances for DNA mastery!
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DNA carries the cell’s genetic information; however, it cannot leave the nucleus.
Because of this, it copies part of its nucleotide sequence into a complementary copy of
mrna during the process called transcription.
During this process, the enzyme,
helicaseseparates the DNA strands.
One strand of DNA acts as the
template from which nucleotides are assembled into a strand of RNA.
Each three letter sequence on the mRNA is called a codon .
The start codon is AUG and the three stop codons are UAG UGA UAA.
Once the mRNA leaves the nucleus, it goes to the to prepare for protein
synthesis, which is called TRANSLATION.
During this process, a TRNA molecule brings the to the ribosome.
The amino acids are hooked together by bonds.
The tRNA is able to match up to the mRNA by the in its anticodons.
When the STOP codon is reached, the protein chain is released into the cytoplasm.
Word Bank:
transponderrRNAlysosomepeptidenucleustRNAAUGribosomelipidscomplimentary basesamino acidhelicasecarbohydrateenzymestoptranslationDEF QRS,XYZtranscriptiontemplateproteincodonmutationcytoplasmABCmRNAUAG UGA UAAstart
1. What is the process called when DNA copies part of its nucleotide sequence into a complementary copy of mRNA?
Transcription
2. What enzyme separates the DNA strands during transcription?
Helicase
3. What is each three-letter sequence on the mRNA called?
Codon
4. What is the start codon?
AUG
5. What are the three stop codons?
UAG, UGA, UAA
6. What is the process called when mRNA goes to the ribosome to prepare for protein synthesis?
Translation
7. What molecule brings the amino acids to the ribosome during translation?
tRNA
8. How are the amino acids hooked together during translation?
Bonds
9. How does the tRNA match up to the mRNA during translation?
By the complimentary bases in its anticodons.
10. What happens when the stop codon is reached during translation?
The protein chain is released into the cytoplasm.