Genetic Information, Variation and Relationships between Organisms Flashcards
1
Q
Describe DNA in a prokaryotic cell
A
-short
-circular
-not associated with proteins
2
Q
Describe DNA in a eukaryotic cell.
A
-long
-linear
-associated with proteins called histones
3
Q
What forms a chromosome?
A
A DNA molecules and its associated proteins
4
Q
What is the fixed position that a gene occupies on a DNA molecule called?
A
A locus
5
Q
What is a sequence of 3 DNA bases called?
A
A triplet
6
Q
What does a triplet code for?
A
A specific amino acid
7
Q
What are amino acid coding sequences called?
A
Exons
8
Q
What are non coding sequences called?
A
Introns
9
Q
What is splicing (transcription)?
A
Introns from premRNA are removed and exons are joined together
mRNA leaves the nucleus to the ribosome
