3 years ago

human space exploration is expensive and dangerous. explain why NASA should or should not continue doing it

1 answer:

7 0

Answer: It is lethal without an appropriate explanation. The lack of oxygen and high pressures are a huge risk, also the temperature and radiation.

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What are zymogens? Give an examples

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Answer:

An example of zymogen is pepsinogen. Pepsinogen is the precursor of pepsin. Pepsinogen is inactive until it is released by chief cells into HCl. The latter partially activates pepsinogen. Pepsinogen will be fully converted into pepsin when an inhibiting peptide unit is removed.

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Which statement describes the movement of objects in the Sun-Earth-Moon system?

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4 years ago

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Similarity: Both exocytosis and endocytosis are in the process of transporting huge molecules, a makeup of different atoms, across the membrane using a vesicle and needs energy.

Difference: Endocytosis brings materials into the cell, while exocytosis takes materials out.

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