Comparing Prokaryotes, Eukaryotes, and Viruses

Which of the following structures is present in all prokaryotic cells but absent in most viruses?

• Cell wall

• Plasma membrane

• Nucleus

• Capsid

Which of the following statements best describes eukaryotic cells?

• They lack a true nucleus.

• Their genetic material is not enclosed within a membrane.

• They contain membrane-bound organelles.

• They are always unicellular.

What is the main genetic material found in most viruses?

• Double-stranded DNA only

• Single-stranded RNA only

• Either DNA or RNA

• Both DNA and RNA at the same time

Which of the following is NOT a characteristic of prokaryotes?

• Lack of membrane-bound organelles

• Presence of a nucleus

• Circular DNA

• Cell division by binary fission

Which of the following statements is true about viruses?

• They can reproduce independently.

• They are considered living organisms.

• They require a host cell to replicate.

• They have a cell wall and cytoplasm.

Which of the following is found in both prokaryotic and eukaryotic cells, but not in viruses?

• Ribosomes

• Mitochondria

• Nucleus

• Capsid

Which of the following best describes the genetic material in prokaryotes?

• Linear DNA in a nucleus

• Circular DNA in the cytoplasm

• RNA only

• DNA and RNA in a capsid

Which of the following is a feature unique to viruses?

• Presence of a protein coat called a capsid

• Presence of ribosomes

• Ability to perform cellular respiration

• Presence of a plasma membrane

Which of the following statements is correct regarding the size of prokaryotes, eukaryotes, and viruses?

• Viruses are generally larger than prokaryotes.

• Eukaryotes are generally the smallest.

• Prokaryotes are larger than eukaryotes.

• Viruses are generally the smallest.

Why are viruses considered to be nonliving organisms?

• They do not have genetic information.
• They are not able to move on their own.
• They do not interact with their environment.
• They are not able to reproduce without a host cell.