8.1 — genes and the genetic code Flashcards
1
Q
what is DNA condensed into?
A
chromosomes
2
Q
why must DNA molecules be tightly packed?
A
as it is incredibly long
3
Q
what type of cell and, what part of this cell, are DNA molecules packed into?
A
eukaryotic cells
4
Q
where are DNA molecules wound around?
A
proteins known as histones
5
Q
what is formed after DNA is wound around histones?
A
DNA-histone complexed
6
Q
how do DNA-histone complexes form a chromosome?
A
DNA-histone complexes are wound further to pack the DNA into chromosomes whereby ach chromosome contains just a single molecule of DNA
7
Q
how do prokaryotic cells store DNA?
A
- stored in the cytoplasm
- contain shorter, circular DNA molecules (plasmids)
- do not associate the DNA with histones
- does not contain introns
8
Q
how do eukaryotic cells store DNA?
A
- in the nucleus
- contain long, linear DNA molecules
- associate the DNA with histones
- DNA contains introns
9
Q
A
