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nordsb [41]
3 years ago
5

When seeds germinate, roots grow downward and stems grow upward in response to gravity. This response to gravity is called _____

__.
Chemistry
1 answer:
spayn [35]3 years ago
5 0

Answer:

geotropism/gravitropism

Explanation:

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A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.

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Explanation:

Given that:

A protein has four subunits whose molecular masses are 140, 80, and 60 kDa.

A disulfide bond links the two 80 kDa subunits (possibly identical).

As a result of SDS and dithiothreitol analysis treatment, the molecular masses can not be 360 in total. They are 280, which implies that they are in short of 80 kDa. This means that there are possibilities that two groups with a molecular mass of 80 kDa which are joined by a disulfide bond.

The presence of SDS and dithiothreitol acts as a reducing agent, and they can break disulfide bonds whose pH is greater than 7, i.e. those in basic condition.

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3 years ago
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Scientific explanations
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