[Campbell Biology P.146] Which of the following statements correctly describe structures fou... | Practice Question

Which of the following statements correctly describe structures found in a typical prokaryotic cell, as depicted or described in the provided text and Figure 6.5? Select all that apply.

  • A: Fimbriae are attachment structures on the cell surface that are often not visible under a Transmission Electron Microscope (TEM).
  • B: The nucleoid is a membrane-enclosed region where the cell's DNA is located.
  • C: Ribosomes are tiny complexes responsible for synthesizing proteins according to instructions from the genes.
  • D: The glycocalyx is an inner coating of prokaryotes, crucial for regulating nutrient intake.
  • E: Flagella are locomotion organelles found in some prokaryotes.

Explanation

A: Figure 6.5 explicitly states "Fimbriae: attachment structures on the surface of some prokaryotes not visible on TEM ". B: Figure 6.5 states "Nucleoid: region where the cell's DNA is located not enclosed by a membrane ". The option incorrectly states "membrane-enclosed". C: The text says, "And all cells have ribosomes, tiny complexes that make proteins according to instructions from the genes." Figure 6.5 also labels "Ribosomes: complexes that synthesize proteins". D: Figure 6.5 states "Glycocalyx: outer coating of many prokaryotes, consisting of a capsule or a slime layer". The option incorrectly states "inner coating". E: Figure 6.5 labels "Flagella: locomotion organelles of some prokaryotes".