Answer to Question 1
C
Staining procedures differentiate organisms by using dyes that have been found to stain some bacteria in specific ways. An example of this would be a Gram stain, in which bacteria are first stained with crystal violet, then treated with a strong iodine solution, decolorized with ethanol or ethanol acetone, and then counterstained with contrasting dye. Those retaining the initial stain are considered gram positive; those losing the stain but accepting the counterstain are considered gram negative.
Answer to Question 2
A, B, C, D
Daily exercise and intake of adequate bulk and water are contributions to bowel health. Heeding the need to defecate and defecating at the same time daily will help to keep the gastrocolic reflex healthy. Taking daily laxatives is not conducive to good bowel health.
Cell-wall structure of Gram-positive and Gram-negative bacteria.
Stained section of cerebral cortex from autopsy of a patient with Creutzfeldt-Jakob disease
Amyloid plaques (stained blue) in the brain of a deceased patient who had Alzheimer’s disease.
Crystal structures of SecY complex in “closed” and “open” conformations
The “inside positive” rule
A company spends $117 500 today and has positive cash inflows of $34 000 for each of the next 6 ...