RNA Transcription/Processing 2 Flashcards Preview

Biochemestry Genetics > RNA Transcription/Processing 2 > Flashcards

Flashcards in RNA Transcription/Processing 2 Deck (15):
1

How is the promoter region composed in prokaryotes?

1. TATA box
2. -35 base sequence

2

Why do transcription and translation occur simultaneously in prokaryotes?

1. They have no introns

3

Cistron synonym ?

1. Gene

4

Difference between Monocistronic and Polycistronic?

1. Monocistronic: 1 gene = 1 protein

2. Polycistronic: multiple genes = multiple proteins

5

Prokaryotes are an example of _______cistronic Cells?

1. Mono and Polycistronic

6

Eukaryotes are an example of ______cistronic Cells?

1. Monocistronic

7

What are the promoters for DNA transcription in Eukaryotes?

1. CAAT box
2. TATA box

8

Main posttranscriptional processes of mRNA in Eukaryotes?

1. 7- Methylguanosine CAP 5’
2. Poly-A TAIL 3’
3. Splicing

9

Technically speaking, what is mRNA?

1. Capped
2. Tailed
3. Spliced


Has only EXONS and NO INTRONS!

10

Example of error in splicing ?

1. Beta-thalassemia

11

By which mechanism is there more proteins produced by an organism than the genes that encode for them?

Alternative splicing

12

What is alternative splicing?

Process by which splicing is done in different ways in order to encode for different proteins by the same genes

13

Examples of alternative splicing?

1. Troponin T/ Tropomyosin
2. Transmembrane IG’s vs Secreted IG’s

14

Mechanism of Shiga Toxin?

1. Inhibits 28S rRNA of the 60S subunit of eukaryotic ribosomes

15

tRNA acceptor end for amino acid ?

1. 3’-ACC-5’ (5’-CCA-3’)

Can Carry Amino acid