Answer:
D
Explanation:
Key points:
- Cells have a variety of mechanisms to prevent mutations, or permanent changes in DNA sequence.
- During DNA synthesis, most DNA polymerases "check their work," fixing the majority of mispaired bases in a process called proofreading.
- Immediately after DNA synthesis, any remaining mispaired bases can be detected and replaced in a process called mismatch repair.
- If DNA gets damaged, it can be repaired by various mechanisms, including chemical reversal, excision repair, and double-stranded break repair.
that's from khan academy^
B. The lysosome membrane helps to keep its internal compartment acidic and separates the digestive enzymes from the rest of the cell.
Answer:
In acid-fast staining, carbon fuchsin is used as a primary stain which dissolves the mycolic acid present in the cell wall of <em>Mycobacterium smegmatis </em>and penetrates through it which results in staining <em>Mycobacterium</em> red.
Staphylococcus aureus cell wall does not contain mycolic acid so carbon fuchsin does not penetrate its cell wall, therefore, it becomes colorless after destaining with acid alcohol.
After destaining step methylene blue is added to stain non-acid-fast bacteria blue. So if I mistakenly forgot to use methylene blue during the procedure <em>Mycobacterium smegmatis</em> will appear red due to carbon fuchsin present in their cell wall and S<em>taphylococcus aureus</em> will appear colorless because it is destained.
The emergency department nurse should be aware that the patient is having anaphylaxis due to a<span> massive release of histamine. </span>The emergency department nurse should be aware that an apparent anaphylaxis presents as difficulty breathing, decreased SpO2, decreased blood pressure, increased heart rate, and other signs and symptoms attributed to shock. The nurse should recognize that peanuts are one of the most common allergens in triggering anaphylactic reaction.
can you please post the chart?
