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microbio;ogy

lecture quiz 3

QuestionAnswer
Mycobacterium Some bacterial groups lack typical cell wall structure – Gram-positive cell wall structure with lipid mycolic acid (cord factor) • Pathogenicity and high degree of resistance to certain chemicals and dyes • Basis for acid-fast stain
Mycoplasma bacteria with no cell wall – Membrane is stabilized by sterols (absorbed from the media-limiting factor) – Pleomorphic
fluid mosaic model Phospholipid bilayer with embedded proteins –
fluid mosaic model uses Site for energy reactions, nutrient processing, and synthesis – Passage of nutrients into the cell and discharge of wastes – Selectively permeable
CYTOPLASM – Dense gelatinous solution of sugars, amino acids, and salts – 70-80% water • Serves as solvent for materials used in all cell functions
NUCLEOID REGION chromosome – Single, circular, double-stranded DNA molecule that contains all the genetic information required by a cell
NUCLEOID REGION Plasmids – Free small circular, doublestranded DNA – Not essential to bacterial growth and metabolism – Used in genetic engineering – Readily manipulated and transferred from cell to cell
PROKARYOTIC RIBOSOMES
Created by: Virajasaur
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