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Zoology MCQs for NEET — Practice Questions with Answers

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Which of the following is true about melatonin?

A. It influences metabolism B. It influences pigmentation C. It influences menstrual cycle D. All of these

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Explanation

Refer NCERT, Heading 22.2.3 Para 1 page 334

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The thyroid gland is composed of

A. Follicles B. Stromal tissues C. Follicular cells enclosing a cavity D. All of these

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 334

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Which of the following is true about thyroid gland?

A. It has 2 lobes B. It is present on either side of trachea C. both lobes are connected by a thin flap, Isthmus D. All of these

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 334

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Which of the following is present in most abundant amount in thyroxine

A. T₃ B. T₄ C. T₂ D. T₁

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 334

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A child, with stunted growth, mental retardation, low IQ, and deaf- mutism, is having these conditions because of

A. hyperthyroidism B. hypothyroidism C. Cancer of thyroid gland D. all of these

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 335

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A man is having tumor in thyroid gland which adversely affects the body physiology, this is because of

A. hyperthyroidism B. hypothyroidism C. Both 1. and 2. D. None of these

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 335

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A person who has enlarged thyroid gland, protruded eye balls, increased BMR and weight loss is suffering from

A. Exopthalmic goitre B. Graves’ disease C. Both 1. and 2. D. Addison disease

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 335 Exopthalmic goitre is also called Graves’ disease.

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Which of the following hormone regulates BMR of the body?

A. Thyroxine B. Thyrocalcitonin C. Adrenaline D. Both 2. and 3.

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 335

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Thyroxine controls the metabolism of the following Macromolecules except

A. Carbohydrates B. Fats C. Proteins D. Nucleic acids

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 335

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Which of the following is incorrect about Thyroid hormones?

A. It supports erythropoiesis B. It maintains water and electrolyte balance C. It controls blood phosphate level D. It regulates BMR

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Explanation

Refer NCERT, Heading 22.2.4 Para 1 page 335

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