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During urine formation… (Class 10 Science SQP 2026-27, Q3)

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ScienceCBSE Class 10 · Sample paper, session 2026-27 · 1 mark · MCQ

CBSE Class 10 Science sample paper 2026-27: question 3

From the official CBSE sample question paper for 2026-27, section A, question 3, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q3 · 1 mark · MCQLife Processes

During urine formation, tubular reabsorption and secretion take place in the kidneys. Which of the following sets correctly indicates both the substances that are reabsorbed in the kidneys?

  1. (A)Glucose and salts
  2. (B)Glucose and starch
  3. (C)Glycogen and salts
  4. (D)Glycogen and starch

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2026-27.

Hints

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

Hint 1

Think about which useful small molecules the body must not lose in urine.

Hint 2

Can a polysaccharide such as starch be present in the blood filtrate?

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. As the filtrate passes along the tubule, useful substances are taken back into the blood. These include glucose, amino acids, salts and much of the water.

  2. Starch and glycogen are large polysaccharides. They are not present in the blood plasma, so they are never filtered or reabsorbed.

  3. Therefore the correct pair is glucose and salts, option (A).

    1 mark

Answer: Option (A): Glucose and salts

Where the marks are

  • Chooses glucose and salts as the reabsorbed substances (1 mark)

Revise the chapter

  • Chapter: Life Processes (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Life Processes, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2026-27: 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.