18) Bundles of fibrils which arise from the end and spiral around some prokaryot
ID: 149804 • Letter: 1
Question
18) Bundles of fibrils which arise from the end and spiral around some prokaryotic providing motility for spirochetes are termed a) slime layers b) plasmids cflagellurm d) axial filaments e) pseudopods C cells 19) A wellorganized, Jirmly attached, polysaccharidel/polypeptide layer found surrounding cell wall of some bacteria is known as a(n): a) slime layer b) capsule c) plasmid d) pili e) capsomere 20) Highly durable, dehydrated cells with thick plasma membranes/cell walls containing bacterial DNA which tolerate Gram positive bacteria are known as: a) plasmids b) ribosomes c) mitochondria d) axial filaments e) endospores high temperatures, toxins, radiation, etc., produced primarily by 21) The plasmid of a prokaryotic cell may best be defined as(a): a) extrachromosomal, 5-100 genetic elements, replicate independently, transferred b) filamentous, rotates, provides motility c) site for protein synthesis d) highly durable dehydrated cells e) protein structure in the plasma membrane which mediates movement in/out of cell 22) The genetic information of bacterial cells is located in: a) a single, looped, folded and circular, double strand of DNA with no nuclear membrane b) a single, looped & folded single strand of DNA with a solid nuclear membrane c) various proteins scattered throughout the cell d) ribosomes in the rough endoplasmic reticulum e) specialized areas on the plasma membrane 23) A classification of bacteria known as the gliding bacteria produce a poorly organized layer that is loosely attached to their cell wall, often used to move in a wave is known as (a): a) capsule b) mycolic acid c) slime layer d) b actosterols e) pseudomureinExplanation / Answer
18. Answer is c) Axial filaments
Because axial filaments providing motility for spirochetes which arise from the end and spiral around some prokaryotic cell.
19. Answer is b) Capsule
Because If the glycocalyx is well organized and is firmly attached it is called a capsule.
20. Answer is e) Endospores
Endospores are resistant to heat and ratiation and is highly stable.
21. Answer is a) extrachromosomal, 5-100 genetic element, replicate independently, transferred.
Plasmid, in microbiology, an extrachromosomal genetic element that occurs in many bacterial strains that replicate independently of the bacterial chromosome.
22. Answer is a) a single, looped, folded and circular, double strand of DNA with no nuclear membrane.
Because bacteria has no nucleus and nuclear membrane and it has circular and folded DNA without nuclear membrane.
23. Answer is c) slime layer
A slime layer in bacteria is an easily removable, unorganized layer of extracellular material that surrounds bacteria cells.
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