12 Questions
What is the internal structural feature of a prokaryotic cell that comprises a closed loop of double stranded DNA?
Nucleoid
What surrounds the cytoplasm in a prokaryotic cell?
Cell wall
What does the genetic material of prokaryotes lack?
True nucleus
What are small, self-replicating extrachromosomal elements called in some bacteria?
Plasmids
What is the function of ribosomes in a cell?
Site of protein synthesis
Which type of cells contain a nucleus and many organelles?
Eukaryotic cells
What is the main component of eukaryotic cell membranes that enhances their rigidity?
Lipids called sterols
What role does the cell wall play in eukaryotic cells?
Provides structural support and protection
What is the composition of the shaft of a eukaryotic flagellum?
Molecules of a globular protein called tubulin arranged in chains to form hollow microtubules
What is the function of cilia in single-celled eukaryotes?
To propel the cell through its environment
What is the genetic status of eukaryotes in terms of chromosomes compared to prokaryotes?
Eukaryotes have one or more pairs of chromosomes, while prokaryotes are haploid
What gives the rough endoplasmic reticulum its granular appearance under the electron microscope?
The presence of numerous ribosomes on its surface
Test your knowledge of the internal structural features of motile spiral forms of bacteria, including their genetic material, ribosomes, and nutrient storage inclusions.
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