Actinomycin is used only in research applications or cancer treatment because it is active against both prokaryotic and eukaryotic cells.
<h3>How does actinomycin work?</h3>
- Actinomycin D inhibits RNA synthesis in both prokaryotic and eukaryotic cells thus blocking transcription.
- Actinomycin was first isolated from <em>Streptomyces antibioticus</em>.
- These bind to the DNA at the site of transcription initiation complex and prevent the activity of DNA dependent RNA polymerase.
- By blocking the metabolic machinery of cells (RNA synthesis), actinomycin prevents the growth of cells. Therefore used in cancer treatment to prevent uncontrolled proliferation of cells.
- As it can also act on eukaryotic cells so it is not used as an antimicrobial drug as it can harm the cells of our body.
- However it can be used in research to prevent microbial growth in petri plates.
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The answer is probably B but C is also technically correct however that function is less important than to give the body oxygen.
AIds or HIV is acquired through direct contact with certain body fluids from someone already been infected. One has aids when the immune system is badly damaged and one become more vulnerable to infections. When the number of CD4 cells falls below 200 cells per cubic millimeter blood, it is considered to have progressed to aids. Some symptoms include fever, chills, rash, fatigue and other flu-like symptoms.
Not going outside for vitamin D to grow healthy.
I would go with B. A friend needs to empathize and show that they care about your feelings.
As for A, a friend does not need to always agree withe every single thing you say. Everyone has their different opinions and feelings about certain things. Let's say you like a certain food. Maybe your friend doesn't agree and actually dislikes that food, but both of you are still friends despite the fact that you do not agree about the food.
For C, a friend should always be honest. Of course, they should not be so blunt as to hurt your feelings very badly, but they should tell you what they truly think, but in a polite and civil way, of course.
For D, they are not reliable if they are only like that when they are in a good mood. Even if they are upset with you, that does not give them the right to give out any secrets or any private information that you have shared with them.
So, in conclusion, B: Empathizes by showing care and sensitivity to your feelings, is the best option.
I hope I helped! :D
