Cell Biology Quiz

Which of the following is a characteristic of prokaryotic cells?

• They have a nucleus.

• They are usually multicellular.

• They contain 70S ribosomes.

• Their DNA is linear.

What is a key difference between prokaryotic and eukaryotic cells?

• Prokaryotic cells have membrane-bound organelles.

• Eukaryotic cells lack a nucleus.

• Prokaryotic cells have circular DNA.

• Eukaryotic cells are usually unicellular.

Which domain includes most extremophiles?

• Bacteria

• Eukarya

• Archaea

• Protista

What is the typical size range for eukaryotic cells?

• ~1–5μm

• ~10–100μm

• ~0.1–1μm

• ~100–1000μm

Which of the following is a common bacterial shape?

• Cuboidal

• Coccus

• Triangular

• Hexagonal

What is the function of pili in prokaryotic cells?

• They contain genetic material.

• They enable surface attachments or facilitate plasmid exchange.

• They help in photosynthesis.

• They store nutrients.

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

• Cellulose

• Chitin

• Peptidoglycan

• Lignin

Where is the genophore located in a prokaryotic cell?

• Cytoplasm

• Nucleus

• Nucleoid

• Ribosome

What is the role of flagella in prokaryotic cells?

• They store energy.

• They contain enzymes for digestion.

• They allow for bacterial movement.

• They synthesize proteins.

According to the theory of endosymbiosis, what did the engulfed cell contribute to the host cell?

• Energy storage

• New functionality

• Genetic material

• Structural support