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Flashcards in Transcription & Translation Deck (19):
0

In transcription what are the three parts of an RNA nucleotides

A. Phosphate group
b. Ribose
c. Nitrogen base

1

How is RNA different from DNA

1. Uracil instead of thymine.
2. Singlestrand instead of a double.
3. Ribose instead of deoxyribose

2

Are the three types of RNA and what do they do

mRNA- carries message to make proteins
rRNA- makes up ribosome
tRNA- transports/ carries amino acids

3

What is the purpose of transcription for a cell?

To make mRNA

4

What are the steps of transcription

1. RNA polymerase binds a promoter sites and unzip helix
2. RNA polymerase attach nucleotides, it moves down the DNA with a strand behind it, then it zips back together
3. After, RNA completely detaches from the DNA

5

Compare contrast DNA Polymerase an RNA polymerase

DNA- Proofreads
RNA- unzips helix
-add free-floating nucleotides

6

What is transcripted during transcription

One gene

7

Where does transcription take place?

Nucleus

8

Why does the RNA polymerase know where to start and stop

Promoter and termination sites

9

What is the purpose of translation for cell?

Decode mRNA into proteins

10

Where in the cell does translation take place

On the ribosome

11

What is a codon

A group of three nucleotides on mRNA that code for a particular amino acid

12

How is mRNA translated

Nitrogen base sequence in groups of three codons

13

How many codons are possible

64

14

How many amino acids are there

20

15

The sequence of amino acids in a protein is always determined by the...

Ribosome

16

What is the first stage of translation what happens during this stage

Initiation
-mRNA attaches to small rRNA subunit
-tRNA brings in first amino acid
-large subunit of rRNA attaches

17

What is the second stage of translation

Elongation
-tRNA brings in amino acid based off
codon
-peptide bond forms between each amino acid (amino acid chain grows)

18

What is the last stage of translation

Termination
-mRNA reaches a stop codon and releases
-Ribosome disassembles
-protein is released