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There is a hormone which… (Class 10 Science 2024, Q23B)

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ScienceCBSE Class 10 · Board exam 2024, set 31/1/1 · 2 marks · Very short answer

CBSE Class 10 Science 2024: question 23(B)

Set in the CBSE Class 10 board exam of 2024, paper 31/1/1, section B, question 23(B), for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q23(B) · 2 marks · Very short answerControl and Coordination

There is a hormone which regulates carbohydrate, protein and fat metabolism in our body. Name the hormone and the gland which secretes it. Why is it important for us to have iodised salt in our diet?

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/1/1.

Hints

Open one hint at a time and try again before the next.

Hint 1

The hormone that controls metabolism is made by a gland in the neck.

Hint 2

Which element in iodised salt is used to make this hormone, and which disease results from its lack?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Hormone: Thyroxine.

    ½ mark

  2. Gland: Thyroid gland.

    ½ mark

  3. Iodised salt is needed because the thyroid gland requires iodine to make thyroxine. Lack of iodine in the diet causes goitre, a swollen neck.

    1 mark

Answer: Thyroxine; thyroid gland; iodine is needed to make thyroxine and its deficiency causes goitre

Where the marks are

  • Names thyroxine (½ mark)
  • Names thyroid gland (½ mark)
  • Iodine is needed for thyroxine synthesis; deficiency causes goitre (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Control and Coordination, one at a time, marked against the answer key and marking points.Back to the full paper2024 board paper, set 31/1/1: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.