Lecture 16 Flashcards Preview

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Flashcards in Lecture 16 Deck (17):
1

What is the process by which DNA directs protein synthesis?

gene expression

2

What are the 2 stages of gene expression?

transcription and translation

3

What is transcription?

the synthesis of RNA using information in DNA

4

What is translation?

the synthesis of a polypeptide using information in the mRNA

5

Where does translation happen in prokaryotes?

cytoplasm, it can begin before transcription is finished

6

What is the concept that cells are governed by cellular chain of commands?

central dogma

7

What is the series of nonoverlapping three-nucleotides words?

triplet code

8

What is the sequence where RNA polymerase attaches?

promoter (including the TATA box)

9

What mediate the binding of RNA polymerase?

transcription factors

10

What is the first stage of transcription?

initiation

11

What is the second stage of transcription?

Elongation

12

What is the last stage of transcriotion?

termination

13

What is the complete assembly of transcription factors and DNA polymerase 2 called?

transcription initiation complex

14

In eukaryotes what is attached at the 5' end? what about the 3' end?

5' cap and the poly-a tail

15

What are the functions of those modifications?

- facilitate export
-protect mRNA from hydrolytic enzymes
- help ribosomes to attach at 5' end

16

What removes introns and joins exons?

RNA splicing

17

catalytic RNA molecules that function as enzymes and can splice RNA

ribozymes