Skip to content

Question No. 8 & 9 consists of… (Class 10 Science 2026, Q9)

questionbuddy.in/q/cbse-10-science-2026-31-5-1-q9-consists-selecting-appropriate-peristaltic-movements

ScienceCBSE Class 10 · Board exam 2026, set 31/5/1 · 1 mark · Assertion-reason

CBSE Class 10 Science 2026: question 9

Set in the CBSE Class 10 board exam of 2026, paper 31/5/1, section A, question 9, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q9 · 1 mark · Assertion-reasonCompetency-basedLife Processes

Question No. 8 & 9 consists of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option from (A), (B), (C) and (D) given below.

Assertion (A): The peristaltic movements occur all along the gut.

Reason (R): The lining of the gut has muscles that contract rhythmically to push the food in regulated manner.

  1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
  2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
  3. (C)Assertion (A) is true, but Reason (R) is false.
  4. (D)Assertion (A) is false, but Reason (R) is true.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2026 board paper, set 31/5/1.

Hints

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

Hint 1

What produces peristaltic waves in the gut?

Hint 2

Check whether R describes the cause of A.

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. A is true: peristalsis occurs all along the gut, from the oesophagus to the intestines.

  2. R is true and is the cause of A: the rhythmic contraction of muscles in the gut lining is exactly what produces these peristaltic movements. Answer: (A).

    1 mark

Answer: (A)

Where the marks are

  • Both true, R explains A (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 paper2026 board paper, set 31/5/1: 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.