Chapter 16: Plant and Animal Hormones — Online MCQ Test
SCIENCE · CLASS 10th · Tamil Nadu State Board
Practice Chapter 16: Plant and Animal Hormones with a free chapter-wise online MCQ test.
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....
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Chapter 16: Plant and Animal Hormones — Important Questions & Answers
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.
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.
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.
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.
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.
Animal hormones are transported via the bloodstream from ductless glands to distant target organs, a distinct endocrine system feature.