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Bacterial Cells: Inclusions and Endospores

14 Questions

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Bacterial Cells: Inclusions and Endospores

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Questions and Answers

What is the most common lipid in which diverse prokaryotes store carbon?

Poly-β-hydroxyvaleric acid (PHV)

Poly-β-hydroxyacrylic acid (PHA)

Poly-β-hydroxypropionic acid (PHP)

Poly-β-hydroxybutyric acid (PHB) (correct)

What is the primary function of inclusions found within bacterial cells?

Storage of a substance (correct)

Energy production

DNA replication

Protein synthesis

What do select microbes produce to store inorganic phosphate?

Sulfur granules

Nitrogen granules

Polyphosphate granules (correct)

Carbon granules

What do bacteria and archaea oxidize to produce sulfur storage granules for energy?

Reduced sulfur compounds Signup and view all the answers

What are gas vesicles?

Protein structures that keep water/solutes out, but allow gas in Signup and view all the answers

Which structure is unique to endospores?

Dipicolinic acid (DPA) complexed with Ca2+ Signup and view all the answers

What do small acid soluble proteins (SASPs) do during sporulation?

Bind DNA and help make it more compact, protecting it from damage Signup and view all the answers

What is the function of carboxysomes?

Concentrate enzymes involved in carbon fixation to increase efficiency and reduce unwanted side reactions Signup and view all the answers

What is the main purpose of microcompartments produced by some bacteria?

To encase specific enzymes/metabolites/cofactors to make metabolism more efficient Signup and view all the answers

What happens when the environment becomes more favorable for endospores?

The spore can be activated, germinate and return to the vegetative state Signup and view all the answers

What is the unique feature of the core of endospores that increases resistance to desiccation, heat, and chemicals?

Dipicolinic acid (DPA) complexed with Ca2+ Signup and view all the answers

What is the function of exosporium in some spores?

Protective protein layer that provides resistance/stability Signup and view all the answers

What makes endospores much more resistant than other kinds of bacterial spores?

Unique dipicolinic acid (DPA) complexed with Ca2+ and small acid soluble proteins (SASPs) Signup and view all the answers

What do gas vesicles confer to certain microbes?

Buoyancy – bring these microbes to a favourable environment Signup and view all the answers