18 Questions
Which shape is not included in the three shapes mentioned for bacteria morphology?
Rods
Which mechanism is not listed as a major mechanism to generate metabolic energy in bacteria?
Oxidation
What is the source of carbon for Autotrophs in bacteria?
Carbon Dioxide
Which phase of bacterial growth involves equal death and creation of bacteria?
Stationary Phase
What determines the direct plate count method to determine cell number in bacteria?
Counting Colonies (CFU/mL)
Which pH range is classified as alkaliphiles according to the text?
>8.0-10.5
What is the main function of the cytoplasmic/cell membrane in bacterial cells?
Transport solutes
Which component of the bacterial cell envelope primarily serves as a barrier to hydrophobic compounds?
Outer membrane
What is the function of porins in the outer membrane of gram-negative bacteria?
Control passage of solutes and nutrients
Which layer forms the innermost part of the bacterial cell envelope?
Lipid bilayer
In bacterial cells, how is chemical energy (ATP) generated in the absence of mitochondria?
By the cytoplasmic/cell membrane
What is the main role of the outer membrane in gram-negative bacteria with regard to antibiotics?
Provide high antibiotic resistance
Which component of a bacterial cell is responsible for holding the nucleus and ribosomes?
Cytoplasmic membrane
What is the primary function of the outer membrane in a bacterial cell?
Regulating the passage of molecules into the cell
Which part of a bacterial cell is involved in the process of protein synthesis?
Inner membrane
What role does the cell envelope play in bacterial metabolism?
Providing structural support
In terms of metabolism, what is the main function of the cytoplasmic membrane in bacteria?
Synthesizing ATP
Which component of a bacterial cell contributes most to its resistance profile against antibiotics and chemicals?
Outer membrane
Test your knowledge on bacterial morphology and metabolism with this quiz covering shapes such as cocci, bacilli, and spirals, as well as metabolic mechanisms like fermentation, respiration, and photosynthesis. Explore the sources of carbon for bacterial cellular constituents and the classification of bacteria based on their metabolic processes.
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