1. True false correction questions. Mark as T if true and F if false. If a state
ID: 191772 • Letter: 1
Question
1. True false correction questions. Mark as T if true and F if false. If a statement is false, you will need to correct it in order to receive credit for your answer. There could be more than one error in a statement. Your corrections must be substantial, meaning that it is not ok to remove or add a "not", or to mark something out but not replace it unless it is unavoidable. Make sure you replace the incorrect portion to get credit. If something is underlined, it cannot be changed. Bacillus and Staphylococcus will hold the primary stain during the iodine step, whereas Escherichia coli will not; this allows gram +bacteria to be distinguished from gram-bacteria. S. aureus and other gram + bacteria do not have any membranes as part of the cell walls; their cell walls contain teichoic acid, which has a full positive charge from the phosphorus present in the molecule negahiveExplanation / Answer
The first statement is true because Staphylococcus aureus is a Gram positive bacteria: which hold the primary stain during the iodine step, whereas E. coli will not which is a Gram negative bacteria. On the basis of this quality, we can differentiate between the two major categories of bacteria: Gram positive and Gram negative. It also explains that how the Gram stain reaction affects Gram positive and Gram negative bacteria based on the biochemical and structural differences of their cell walls.
The second statement is wrong because S. aureus and other gram + bacteria have only one underlying plasma membrane as part of the cell walls; Their cell walls contains teichoic acid, which has a negatively charged because of presence of phosphorus in the teichoic molecule.
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