1.3a: Gene expression Flashcards
1
Q
What does gene expression involve?
A
Transcription and translation of DNA sequence
2
Q
How much are the genes expressed?
A
Only a fraction
3
Q
What is RNA?
A
Single-stranded
Composed of nucleo containing ribose sugar, phosphate and one of four bases
4
Q
What are the four bases in RNA?
A
cytosine, guanine, adenine and uracil
5
Q
What types of RNA does translation and transcription involve?
A
mRNA
tRNA
rRNA
6
Q
What does messenger RNA do?
A
carries a copy of the DNA code from the nucleus to the ribosome
7
Q
What does transfer RNA do?
A
folds due to complementary base pairing. Each tRNA molecule carries a specific amino acid to the ribosome
8
Q
What does ribosomal RNA do?
A
proteins form the ribosome
