1. DNA Flashcards Preview

DNA, RNA and Protein Synthesis - Biology - Alevel > 1. DNA > Flashcards

Flashcards in 1. DNA Deck (7)
1

How is DNA stored?

Although the structure of DNA is the same in all organisms.
It is stored differently in prokaryotic and eukaryotic cells.

2

What is the DNA like found in eukaryotic cells?

Linear DNA molecules that exist as chromosomes.
Thread - like structures, each made up of one long molecule of DNA and its associated protein.
Chromosomes located in nucleus.

3

In eukaryotic cells because the DNA molecule is so long what happens to it?

It has to be wound up so it can fit into the nucleus.

4

In eukaryotic cells what is the DNA wounded around?

Histone proteins (help support the DNA).
The DNA and the protein is then coiled up very tightly to make a compact chromosome.

5

In eukaryotic cells what does the mitochondria and chloroplasts have?

Their own DNA .
It is circular and shorter then DNA molecules in the nucleus and its not associated with histone proteins.

6

How is the DNA found in prokaryotic cells?

In chromosomes.
DNA molecule is shorter and circular.
Not wound around histones.

7

How does the DNA found in prokaryotic cells fit into the cell?

It condenses by super coiling.