Chapter 3, Problem 9MIC

Some groups of bacteria can go dormant during periods of environmental stress through the formation of _______. A) magnetosomes B) peptidoglycan C) endospores D) pili

13) What is the purpose of a bacterium's cell wall? A) It provides direct protection from antibiotics. B) It prevents sunlight from destroying the cell's DNA. C) It prevents water from diffusing into the cell. D) Bacteria do not have a cell wall.

You perform a Gram staining technique on two bacterial species and observe that one is stained purple while the other is stained pink. Which of the following is consistent with this observation? a) The purple one is likely more resistant to penicillin b) Both bacteria have a cell wall made of mycolic acid c) Their peptidoglycan layers have the same thickness d) They differ in the number of phospholipid membranes e) One has a monolayer of phospholipids while the other has a bilayer of phospholipids

Prokaryotes are classified by their shape and their cell arrangement. Identify the bacteria in the picture below. * Bacillus O Coccus Spirochete O Vibrio The absence of which organelle separates bacteria from being classified as eukaryotes?

Mycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which statement concerning mycoplasmas should be true? They are gram-negative. They are subject to lysis in hypotonic conditions. They lack a cell membrane as well. They should contain less cellulose than do bacteria that possess cell walls. They possess typical prokaryotic flagella.

Which statement best compares the terms "coccus" and "bacillus" as applied to bacteria? Coccus refers to a round cell; bacillus refers to an elongated one Coccus refers to a gram-positive cell; bacillus refers to a gram-negative cell Coccus refers to a gram-negative cell; bacillus refers to a gram-positive cell Coccus refers to an elongated cell; bacillus refers to a round one

I am doing my microbiology homework and I need help with these questions:  1) List the structures ALL bacteria possess. 2) Identify three structures SOME but not all bacteria possess. 5) Describe the structure and function of three different structures found outside of the bacterial cytoplasmic membrane. 6) Differentiate between the two main types of bacterial envelope structures. 7) Why are Gram-positive cell walls stronger than Gram-negative cell walls? 8) Name a substance in the envelope of SOME bacteria that can cause severe symptoms in humans. 9) Describe the causes of sporogenesis and germination 10) Compare and contrast the major features of archaea, bacteria and eukaryotes by completing the table below.   Characteristic Bacteria Archaea Eukarya Chromosome       Type of Ribosomes       Protein Synthesis Similar to Eukarya       Sterols In Membrane       Membrane-bound Organelles       Peptidoglycan in Cell wall

Prokaryotes are classified by their shape and their cell arrangement. Identify the bacteria in the picture below. * Bacillus Coccus Spirochete Vibrio

Gram-negative bacteria are surrounded by two membrane bilayers separated by a space termed the periplasm. The periplasm is a multipurpose compartment separate from the cytoplasm. The periplasm has a distinct oxidizing environment that allow certain key protein structural features to be formed. Can you identify an amino acid(s) that would be affected by this oxidizing environment? How would it be affected, and what structural features would be sensitive to this environment? Can you discuss the implications of this from a standpoint of recombinant protein expression?