Genes, Polpeptides And Non-coding DNA Flashcards
1
Q
How many different DNA triplets or mRNA codons are there due to the presence of four different nucleotides in DNA and RNA
A
64 (4 to the power of 3)
2
Q
What is the DNA triplet start code?
A
ATG
3
Q
What qualities does the genetic code have?
A
It is non-overlapping and universal
4
Q
What do genes determine?
A
Inherited characteristics
5
Q
What do stop codons allow?
A
Ribosomes to detach
6
Q
What is always the first amino acids in a polypeptide chain?
A
AUG - Methianine
7
Q
What percentage of human DNA codes for proteins?
A
Less than 2%
8
Q
Where can non-coding DNA be located?
A
Inside genes or outside genes
9
Q
What are multiple repeats used for?
A
Paternity tests
10
Q
What part of the mRNA gets cut out?
A
The bit of mRNA that is completely to the intron
Exons stay
