13) Which of the following statements about the cell wall diversity in prokaryot
ID: 86282 • Letter: 1
Question
13) Which of the following statements about the cell wall diversity in prokaryotes is NOT correct.
A) Although there is some diversity in bacterial cell wall structure, most bacterial cell walls possess peptidoglycan.
B) Archaeal cell wall structure is much more diverse than bacterial cell wall structure.
C) Although some Archaea make a molecule very similar to PG, like membrane phospholipid structure, the absence of PG in Archaea is another example of a molecular difference that distinguishes the Bacteria and Archaea.
D) While all Bacteria and Archaea with cell walls will stain Gramnegative or Grampositive, the staining reaction is only diagnostic of cell wall structure in certain Bacteria. E) The Slayers of Bacteria and Archaea are very similar in terms of both structure and function.
14) A researcher wants to study the effect of a hypotonic environment on a bacterium that has had its cell wall physically removed. Which of the following statements best describes what a hypotonic environment (a small beaker) is relative to the cell’s cytoplasm?
A) The [solute] concentration of the environment is greater than the [solute] concentration of the cell's cytoplasm.
B) The [solute] concentration of the environment is less than the [solute] concentration of the cell's cytoplasm.
C) The [solute] concentration of the environment is the same as the [solute] concentration of the cell's cytoplasm.
D) The amount of solute in the environment is greater than the amount of solute in the cell's cytoplasm.
E) The amount of solute in the environment is about the same as the amount of solute in the cell's cytoplasm.
Explanation / Answer
Answers:
13) Which of the following statements about the cell wall diversity in prokaryotes is NOT correct:
B) Archaeal cell wall structure is much more diverse than bacterial cell wall structure.
E) The Slayers of Bacteria and Archaea are very similar in terms of both structure and function.
14) A researcher wants to study the effect of a hypotonic environment on a bacterium that has had its cell wall physically removed. Which of the following statements best describes what a hypotonic environment (a small beaker) is relative to the cell’s cytoplasm?
B) The [solute] concentration of the environment is less than the [solute] concentration of the cell's cytoplasm.
Explanation:
In a hypotonic solution, there is more solute inside the cell than in the solution surrounding the cell. As a result, there is more water molecules (solvent) surrounding the cell than water molecules inside the cell.
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