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mixas84 [53]
3 years ago
6

The factor that affects the outcome of an experiment is called the what

Biology
1 answer:
Solnce55 [7]3 years ago
3 0
It would have to be the variable
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Populations change naturally over time. Which mechanism is a method of artifical selection rather than natural selection?
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The true statement is: The Sun's energy passes through the atmosphere without warming it significantly.

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7. A type of cell division that results in diploid cells: [meiosis / mitosis
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Which blood vessels supply deoxygenated systemic blood to the alveoli?
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Suppose an assassin uses abrin, a translation inhibitor, to poison her victim. Place the events in chronological order, starting
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Answer:

The events in chronological order are:

  1. Abrin is absorbed into the blood and enters the body's cells
  2. Abrin binds to ribosomes in the cytoplasm
  3. Abrin inactivates the 28S rRNA in the large subunit of the ribosome.
  4. Ribosomes are unable to add new amino acids to polypeptides
  5. Protein synthesis halts in many tissues
  6. Multiple organ systems fail
  7. Victim dies

Explanation:

Abrin is a toxic protein obtained from the seeds of Abrus precatorius, it is highly toxic, with an estimated human fatal dose of 0.1-1 microgram/kg, and causes death after accidental and intentional poisoning.

When ingested the abrin would enter the victim's body and travel through the blood and eventually enter a cell's cytoplasm (abrin is absorbed into the blood and enters the body's cells). Once there it would interact with the ribosomes and reacts with them on a molecular level (peptide bond catalytic enzyme) (abrin binds to ribosomes in the cytoplasm), which results in the ribosome exhibiting its toxic response to abrin (abrin inactivates the 28S rRNA in the large subunit of the ribosome). As a result of the ribosome reacting to abrin (ribosomes are unable to add new amino acids to polypeptides), protein synthesis within that cell is affected (protein synthesis halts in many tissues). Once multiple cells are affected by abrin the organ will exhibit its toxic response (multiple organ systems fail), and the victim would die.

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