Question

Auxin enhances cell elongation in all of these waysexcept

(A) increased uptake of solutes.

(B) gene activation.

(C) acid-induced denaturation of cell wall proteins.

(D) cell wall loosening.

Short answer

1. The statement "increased uptake of solutes" isfalse.

2. The statement "gene activation" isfalse.

3. The statement "acid-induced denaturation of cell wall proteins" is true.

4. The statement "cell wall loosening" is false.

Step-by-step solution

Plant

The living organism made up of several cells that belong to the kingdom Plantae is called plant. The two distinct categories of plant hormones are plant growth promoters and inhibitors. Examples of plant hormones include auxin, cytokinin, ethylene, brassinosteroids, and gibberellins.

Explanation of option '(A)'

During cell elongation, cell wall extensibility increases by facilitating the uptake of solutes like potassium ions.

Thus, auxin (plant hormone) promotes cell elongation by moving nutrients in plant tissue by uptake of solutes.

Therefore, option a is true, and hence it is the incorrect option.

Explanation of option '(B)'

Auxin causes cell elongation by activating gene expression to induce cell wall loosening and promotes proton extrusion.

Thus, gene activation helps in cleaving bonds through the activity ofproton for cell wall loosening and results in causing cell elongation.

Therefore, option b is true, and hence it is the incorrect option.

Explanation of option '(C)'

Cell elongation is not encouraged through protein denaturation.

Thus, protein promotes cell elongation; instead, denatured protein does not enhance cell elongation.

Therefore, option c is false, and hence it is the correct option.

Explanation of option '(D)'

Auxin contributes to cell wall loosening when a cell grows to promote cell elongation.

Thus, cell elongation occurs via wall loosening.

Therefore, option d is true, and hence it is the incorrect option.