Question

Cytokinins are known to
A) Inhibit cytoplasmic movement
B) Help in retention of chlorophyll
C) Influence water movement
D) Promote abscission layer formation

Answer 1

Hint: Cytokinins are plant-specific hormones or chemical messengers that play a major role in the regulation of the plant cell cycle and numerous developmental processes. These hormones are present in all plant tissues.

Complete answer:
Cytokinins are types of plant hormones that mainly promote cell division. These hormones are abundant in the shoot apex, root tip, and immature seeds. Typically, different types of cytokinins and their modified forms are present in a given tissue. These are also produced by some plant pathogenic bacteria and cyanobacteria. Cytokinins are purine adenine derivative that, in tissue culture, along with auxin it helps to induce cell division. Cytokinins have many important functions in morphogenesis and plant development. They are involved in the regulation of cell division. Cytokinins interact with auxins in the control of lateral branching and apical dominance and the root-shoot ratio in intact plants and in tissue culture. Cytokinins promote the light-independent de etiolation response, including greening of dark-grown seedlings and retard the senescence of leaves. Many cytokinins occur naturally in plants. Cytokinins have an effect on the retention of chlorophyll from higher plants. Chlorophyll content is an important parameter in estimating the plant production level. Farmers use cytokinins to encourage plant growth.
Thus, the right option is B.

Note: Green plants have the ability to make food by themselves. This is done through a process called photosynthesis. Chlorophyll is the main component in photosynthesis. It is located in a plant’s chloroplasts. Chloroplasts are tiny structures in a plant’s cells where the photosynthesis takes place.