Chapter Exam

Chapter 16: Plant and Animal Hormones — Online MCQ Test

Q: Which plant hormone is primarily responsible for cell division?

Answer: C. Cytokinin — Cytokinins promote cell division (cytokinesis) in plant roots and shoots.

Q: Which endocrine gland is known as the 'Master Gland'?

Answer: B. Pituitary — The pituitary gland is called the master gland because it controls the functions of many other endocrine glands.

Q: Deficiency of iodine in the diet leads to which condition?

Answer: B. Goitre — Iodine is essential for the synthesis of thyroxine; its deficiency causes the enlargement of the thyroid gland, known as goitre.

Q: Consider the relationship between hormones and glands. Which pair is INCORRECT?

Answer: C. Thyroxine - Adrenal gland — Thyroxine is secreted by the thyroid gland, not the adrenal gland.

SCIENCE · CLASS 10th · Tamil Nadu State Board

Practice Chapter 16: Plant and Animal Hormones with a free chapter-wise online MCQ test for Tamil Nadu State Board CLASS 10th SCIENCE. This chapter covers: Focusing on chemical coordination this chapter covers plant growth regulators like auxins gibberellins cytokinins and human endocrine glands. Students examine hormone functions met.... AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 16: Plant and Animal Hormones — Important Questions & Answers (FAQ)

Frequently asked questions from Tamil Nadu State Board CLASS 10th SCIENCE — Chapter 16: Plant and Animal Hormones, with answers and explanations. These are sample questions; the exam has its own separate question set.

Which plant hormone is primarily responsible for cell division?

A. Auxin
B. Gibberellin
C. Cytokinin ✓
D. Abscisic acid

Answer: C. Cytokinin
Cytokinins promote cell division (cytokinesis) in plant roots and shoots.

Which endocrine gland is known as the 'Master Gland'?

A. Thyroid
B. Pituitary ✓
C. Adrenal
D. Pancreas

Answer: B. Pituitary
The pituitary gland is called the master gland because it controls the functions of many other endocrine glands.

Deficiency of iodine in the diet leads to which condition?

A. Diabetes mellitus
B. Goitre ✓
C. Dwarfism
D. Acromegaly

Answer: B. Goitre
Iodine is essential for the synthesis of thyroxine; its deficiency causes the enlargement of the thyroid gland, known as goitre.

Consider the relationship between hormones and glands. Which pair is INCORRECT?

A. Testosterone - Testes
B. Progesterone - Ovary
C. Thyroxine - Adrenal gland ✓
D. Insulin - Pancreas

Answer: C. Thyroxine - Adrenal gland
Thyroxine is secreted by the thyroid gland, not the adrenal gland.

Which unique feature differentiates animal hormones from plant hormones?

A. Animal hormones act only at the site of production
B. Animal hormones are secreted by specific ductless glands into the blood ✓
C. Plant hormones do not have specific transport mechanisms
D. Animal hormones are strictly growth inhibitors

Answer: B. Animal hormones are secreted by specific ductless glands into the blood
Animal hormones are transported via the bloodstream from ductless glands to distant target organs, a distinct endocrine system feature.

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Chapter 17: Reproduction in Plants and Animals