Like this study set? Create a free account to save it.

Sign up for an account

Already have a Quizlet account? .

Create an account

State the name given to the structures that DNA wraps around

Proteins (Histones)

Explain why these structures are found only in the structure of eukaryotic chromosomes and not in the chromosome found in prokaryotes

Eukaryotic chromosomes help package the DNA into smaller pieces. Prokaryotes don't have histones and have to use supercoiling

Identify the phase of the cell cycle in which DNA is most likely to be supercoiled


Outline how nucleosomes help regulate transcription

•Supercoiling condenses the DNA molecule by a factor of x15,000
•Histones are responsible for the packaging of DNA
•The metaphase chromosome is an adaptation for mitosis and meiosis
•The fibre must be less condensed for transcription to occur during the interphase
•Condensing controls if the genes are transcribed or not

Nonsense DNA

A mutation that changes an amino acid codon to one of the three stop codons, resulting in a shorter and usually nonfunctional protein

Satellite DNA

Short, highly repeated eukaryotic DNA sequences, usually clustered in heterochromatin and generally not transcribed

Nonsense and satellite DNA

Both the same thing. Non-coding regions of DNA.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions and try again


Reload the page to try again!


Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

Voice Recording