PCB 3134 Definitions - Questions with Correct Answers (Verified Update)

PCB 3134 Definitions - Questions with Correct
Answers (Verified Update)
49 questions with answers
Topic: PCB 3134 Definitions

1. degenerate code
Answer: multiple codons encode a single amino acid

2. nonoverlapping code
Answer: code is read three nucleotides at a time

3. template vs coding strand
Answer: template is complementary to the mRNA strand

4. transcription unit
Answer: DNA that gives rise to one RNA molecule

5. prokaryotic promoter sequences
Answer: -10 sequence (Pribnow box)

6. termination signal
Answer: a specific sequence of nucleotides that marks the end of a gene

7. core promoter
Answer: group of DNA sequences that initiate transcription in eukaryotes

8. four elements that can be in a core promoter (eukaryotes only)
Answer: 1. TATA box 2. BRE sequence

9. types of promoters for RNA pol 2
Answer: TATA driven: has initiator sequence, TATA box, and sometimes BRE

10. types of promoters for RNA pol 3
Answer: tRNA has boxes A and B

11. upstream control elements
Answer: improve promoter's efficiency

12. general transcription factor vs preinitiation complex
Answer: general transcription factor: the proteins that recruit RNA pol to the promoter

13. TF2D
Answer: binds to TATA box in eukaryotic transcription initiation

14. what TF2D recognizes during eukaryotic transcription initiation
Answer: TATA binding protein (TBP)

15. TF2H
Answer: helicase and kinase activity during eukaryotic transcription initiation

16. primary transcript
Answer: pre-coding RNAbefore translation and chemical processing



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