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Flashcards in Gene Expression Deck (13):
1

What do the proteins produced do?

All work together to determine the characteristics that are typical for a species

2

What type of cell expresses two types of gene?

A specialised cell

3

What are the 2 types of gene expressed by a specialised cell?

Those that are vital for its maintenance ( like genes coding for respiratory enzymes) and ones that are vital for its specialised function ( like genes coding for the slow and fast twitch muscle fibres

4

What is RNA?

A single stranded molecule made of nucleotide sub units

5

In RNA what does each sub unit consist of?

A phosphate group, a base and a ribose sugar

6

What are the bases in RNA?

Cytosine
Uracil
Guanine
Adenine

7

What types of RNA are there?

mRNA
tRNA
rRNA

8

When is mRNA formed and what is its function?

Formed during the transcription of the DNA in the nucleus

Iris the template for protein synthesis at the ribosomes and it dictates the sequence of amino acids in the protein being synthesised

9

Describe mRNA

The sugar used is ribose
The bases are adenine cytosine guanine and URACIL
It only has one strand
It moves from the nucleus to the cytoplasm

10

What is the function of tRNA?

It carries specific amino acids to the ribosomes for translation of the genetic code

11

What is the function of rRNA?

It binds proteins to ribosomes

12

Describe a ribosome

Composed of 2 sub units, a small one and a large one
It's the site of protein synthesis
The small sub unit reads the code on mRNA
Large sub unit provides active sites

13

What determines the phenotype of an organism?

Gene expression