Q8
1 markMCQSection A

The plant hormone present in greater concentration in the areas of rapidly dividing cells is:

Control and Coordination
Plant Hormones

Options

(A)Auxin
(B)Cytokinins
(C)Gibberellins
(D)Abscisic acid
Official Answer

B) Cytokinins

cytokininscell divisionfruits and seedsplant hormone

Hint

This hormone 'promotes cell division' according to the chapter, so it would be concentrated wherever cells are dividing fast, such as in growing fruits and seeds.

Quick Oral Answer

Cytokinins promote cell division and are present in greater concentration in regions of rapid cell division, such as fruits and seeds.

Analysis & Explanation

The chapter states: "Cytokinins promote cell division, and it is natural then that they are present in greater concentration in areas of rapid cell division, such as in fruits and seeds." Hence cytokinins are found in greater concentration in areas of rapidly dividing cells, making option (B) correct.


Why the other options are wrong:

(A) Auxin is synthesised at the shoot tip and promotes cell elongation (e.g., helping shoots bend towards light); it is not specifically associated with rapidly dividing cell regions.

(C) Gibberellins, like auxins, help in the growth of the stem (cell elongation), not specifically cell division.

(D) Abscisic acid is a growth-inhibiting hormone that causes wilting of leaves; it slows down growth rather than being concentrated where cells divide rapidly.

Common Mistakes

  1. 1Confusing cytokinins (cell division) with auxins or gibberellins (cell elongation/stem growth).
  2. 2Mistaking abscisic acid, a growth inhibitor, for a growth-promoting hormone.

Interesting Facts

Cytokinins were first discovered in coconut milk, which is rich in dividing endosperm cells — a fact that led scientists to identify their cell-division-promoting role.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2025?

This question carries 1 mark in the CBSE Class 10 Science 2025 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Control and Coordination" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Plant Hormones" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2025 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.