Quiz #3 - cell structure

pleomorphic

Pertaining to a variety of shapes or cell types

endospore

a resistant asexual spore that develops inside some bacteria cells.

The bacterial flagellum moves via?

by rotation that is powered by the proton motive force

Bacteria that do not have a fixed shape are said to be __________.

pleomorphic

Inclusions containing carbon are most commonly in the form of ____________ and can be commercially used to create biodegradable plastics.

poly-beta-hydroxybutyrate

lophotrichous

*Which of the following describe a cluster of flagella emerging from the same site?

Examine the accompanying figure of two lipid molecules arranged in a bilayer. Choose each statement that is correct regarding this structure.

1. The hydrocarbon chains in this lipid are attached to glycerol by an ether linkage (indicated by the letter A). 2. The hydrocarbon chain (indicated by the letter B) is best described as branched. 3. This structure most likely derives from a bacterium.

plasmid

A small ring of DNA that carries accessory genes separate from those of the bacterial chromosome

chromosome

A threadlike, gene-carrying structure found in the nucleus. Each chromosome consists of one very long DNA molecule and associated proteins.

Considering the variations in ribosomes found in bacterial and archaeal cells, which of the following statements are correct about ribosomes in both domains?

A. Ribosomes are composed of two subunits, a large 50S subunit and a small 30S subunit B. Ribosomal proteins from bacteria and archaea are also found in eukaryotes.

storage granules

Accumulations of high-molecular-weight polymers synthesized from a nutrient that a cell has in relative excess

amphitricous

Flagella located on both sides on the bacteria

ribosome

Makes proteins

archaea morphology

appear indistinguishable from bacteria, but the cell wall is non-peptdoglycan which is how we tell them apart

Archaea with a plasma membrane composed of a tetraether monolayer would most likely be found ______.

at a temperature of 90oC

gas vesicle

buoyancy

Another type of inclusion, which photosynthetic microbes often use to store carbon dioxide and the enzyme RuBisCO, is the?

carboxysome

peritrichous

flagella all over

Finally, bouyancy in aquatic bacteria is mediated by ____________ , while certain bacteria accumulate magnetite in ____________ that can detect natural magnetic fields.

gas vacuoles, magnetosomes

Nucleic acids are synthesized from inorganic inclusions called ____________, while specialized photosynthetic bacteria can store energy as ______________.

polyphosphate granules, sulfur globules

archaea morphology

square