Prokaryotic vs. Eukaryotic DNA quiz

How is DNA stored inside of prokaryotes?

• Housed inside the nucleus and in the form of chromatin

• Free flowing in the cytoplasm, in the nucleoid, looped chromosome

• Free flowing in the cytoplasm, in the form of chromatin

• Housed inside the nucleus and in the form of a plasmid, looped

How is DNA stored inside of eukaryotes?

• Housed inside the nucleus and in the form of chromatin

• Free flowing in the cytoplasm, in the nucleoid, looped chromosome

• Free flowing in the cytoplasm, in the form of chromatin

• Housed inside the nucleus and in the form of a plasmid, looped

What is a plasmid?

• A large DNA structure found in the nucleus of eukaryotes

• A small, looped DNA structure found in the nucleus of prokaryotes

• A large DNA structure found in the cytoplasm of prokaryotes

• A small, looped DNA structure found in the cytoplasm of prokaryotes

Which of the following is a form of gene regulation found almost exclusively in prokaryotes?

• Operons

• Introns/exons

• Chromatin packaging

• Transcription factors

In the lac operon model the genes within the operon will be expressed if:

• lactose is absent in the cell
• glucose is present in the cell
• lactose is present in the cell

The lac operon is an example of an inducible operon. Which of the following describes the process that occurs when lactose is present?

• The lactose binds to the repressor which inactivates it and the repressor binds to the operator to turn translation on

• The lactose binds to the repressor which activates it and the repressor releases from the operator to turn translation on.

• The lactose binds to the repressor which inactivates it and the repressor releases from the operator to turn translation on.

• The lactose binds to the repressor which activates it and the repressor binds to the operator to turn translation on

The trp operon is an example of an repressible operon. Which of the following describes the process that occurs when tryptophan is present?

• The tryptophan binds to the repressor which inactivates it and the repressor binds to the operator to turn translation off.

• The tryptophan binds to the repressor which activates it and the repressor releases from the operator to turn translation off.

• The tryptophan binds to the repressor which inactivates it and the repressor releases from the operator to turn translation off.

• The tryptophan binds to the repressor which activates it and the repressor binds to the operator to turn translation off.

How is DNA in eukaryotic organisms packaged?

• Loosely, freely flowing

• Loosely, but kept stable through histones

• Tightly packaged using histones

• Looped around itself