Answer:
Examples of paradigm shifts are the movement of scientific theory from the Ptolemaic system (the earth at the centre of the universe) to the Copernican system (the sun at the centre of the universe), and the movement from Newtonian physics to the theory of relativity and to quantum physics.
Explanation:
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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As you sweat during exercise, ions and water come out of your skin and you can replenish them by taking a shower after the workout.
1. compact or dense
The hard, outside part of a bone is called compact or dense tissue.
2. Bone marrow
The inner cavities of bones are filled with Bone marrow.
3. muscle
The bones are operated by muscles to produce body movements
4. cancellous
The spongy, inner tissue of a bone is called cancellous tissue.
5. bone
Red blood corpuscles are formed in the bone marrow of bones.
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Answered by: ms115
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