Question

Identify a, b, c and d in the given sentences.
$1.$ Spraying sugarcane crop with $... \, .a....$ increases in the length of the stem, thus increasing the yield by as much as $.. \, ..b....$ tonnes per acre.
$2.$ $\ldots . \, c....$ does not occur naturally in plants.
$3.$ Search for natural substances with cytokinins like activities led to the isolation of $...d...$ from corn kernels and coconut milk.

• A. a-auxins, b-10, c-NAA, d-zeatin
• B. a-gibberellins, b-20, c-zeatin, d-kinetin
• C. a-gibberellins, b-l0, c-zeatin, d-kinetin
• D. a-gibberellins, b-20, c-kinetin, d-zeatin

Answer 1

Answer: (D)

Gibberellins is a type of promotory hormones. One of the effects of this hormone is the increase in the axis of the stem. Commercially, sugarcane is crop is sprayed with it that helps in increasing the yield nearly by 20 acres. Cytokinin is a group of plant growth regulator that promotes cell division. Kinetin is a type of cytokinin which is a modified purine discovered in autoclaved herring sperm DNA. Zeatin is another type of cytokinin which was found in corn kernels and coconut milk. It is a naturally occurring plant hormone.