Cell Biology Quiz

Which of the following is a characteristic of prokaryotic cells?

• They have a nucleus.

• They contain 80S ribosomes.

• They are usually unicellular.

• Their DNA is linear.

What type of DNA do eukaryotic cells possess?

• Circular and naked

• Linear and packaged with histone proteins

• Circular and contains introns

• Linear and lacks introns

Which domain includes most extremophiles?

• Bacteria

• Eukarya

• Archaea

• Protista

What is the size range of prokaryotic cells?

• ~10–100μm

• ~1–5μm

• ~5–10μm

• ~100–200μm

Which bacterial shape is described as spherical?

• Bacillus

• Spirillus

• Coccus

• Vibrio

What is the function of pili in prokaryotic cells?

• They contain motor proteins for movement.

• They enable surface attachments or facilitate plasmid exchange.

• They contain the genophore.

• They are made of peptidoglycan.

What is the primary component of the cell wall in bacteria?

• Cellulose

• Chitin

• Peptidoglycan

• Glycocalyx

Which structure in prokaryotic cells contains the genophore?

• Plasmid

• Nucleoid

• Ribosome

• Flagella

What is the role of flagella in prokaryotic cells?

• They store genetic information.

• They facilitate movement.

• They synthesize proteins.

• They protect the cell from the environment.

According to the theory of endosymbiosis, what happened to the engulfed cell?

• It was digested and used for energy.

• It remained undigested and contributed new functionality.

• It was expelled from the host cell.

• It became a virus.