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Law Incorporation [45]
2 years ago
10

According to the acid-growth hypothesis, auxin causes increased acidity in cell walls, which then activates ____ that disrupt(s)

bonds between cellulose microfibrils, allowing cell expansion
Biology
1 answer:
nalin [4]2 years ago
7 0

Answer:

proteins called expansins

Explanation:

The complete question is :

<em>According to the acid-growth hypothesis, auxin causes increased acidity in cell walls, which then activates ____ that disrupt(s) bonds between cellulose microfibrils, allowing cell expansion.</em>

<em>a. a membrane potential </em>

<em>b. an mRNA </em>

<em>c. AUX1 transporters </em>

<em>d. K+ ions </em>

<em>e. proteins called expansins</em>

<em></em>

  • The acid growth hypothesis explains the growth of cells and organs in the plants.
  • According to this hypothesis, the plant hormone auxin causes induction of the H+ proton extrusion into the apoplast which leads to the activation of expansin which a pH-sensitive protein.
  • Expansin is responsible for wall stretching and relaxation and causes hydrolysis of hydrogen bonds and thus helps in cell expansion.
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