mRNA, tRNA, rRNA Flashcards
1
Q
What 3 types of RNA are there?
A
- mRNA
- tRNA
- rRNA
2
Q
What is mRNA?
A
- (messenger RNA)
- single polynucleotide strand
- made in the nucleus during transcription
3
Q
What is mRNA main role?
A
- carries the genetic code from the DNA in the nucleus to the cytoplasm, where it is used to make a protein during translation
4
Q
What are codons?
A
groups of three adjacent bases in mRNA
5
Q
what is tRNA?
A
- transfer mRNA
- single polynucleotide strand that is folded into a clove shape
- hydrogen bonds between specific base pairs hold the molecule in shape.
6
Q
What is an anticodon?
A
when a tRNA molecule has a specific sequence of three bases at one end.
7
Q
What is the main role of tRNA?
A
-found in the cytoplasm
- involved in translation
- carries the amino acids that are used to make proteins to the ribosomes.
8
Q
Are anticodons on the tRNA complementary to codons on mRNA?
A
yes
9
Q
What is rRNA?
A
- ribosomal rna
- forms 2 subunits in a ribosome, along with proteins.
- ribosomes move along the mRNA strand during protein synthesis.
10
Q
What is the main role of rRNA?
A
It helps catalyse the formation of peptide bonds between the amino acids.
11
Q
Why is it called ribosomal RNA?
A
it makes up the ribosomes
12
Q
What does it mean the genetic code is a triplet code?
A
Each amino acid is coded for by a sequence of 3 bases.
