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Secretion of less saliva in… (Class 10 Science 2025, Q8)

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ScienceCBSE Class 10 · Board exam 2025, set 31/1/1 · 1 mark · MCQ

CBSE Class 10 Science 2025: question 8

Set in the CBSE Class 10 board exam of 2025, paper 31/1/1, section A, question 8, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q8 · 1 mark · MCQLife Processes

Secretion of less saliva in mouth will effect the conversion of:

  1. (A)proteins into amino acids
  2. (B)fats into fatty acids and glycerol
  3. (C)starch into simple sugars
  4. (D)sugars into alcohol

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/1/1.

Hints

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

Hint 1

Which enzyme is present in saliva?

Hint 2

What food does that enzyme act on?

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. Saliva contains the enzyme salivary amylase.

  2. Salivary amylase breaks down starch into simple sugars. Less saliva therefore affects this conversion, so the answer is option (C).

    1 mark

Answer: Starch into simple sugars, option (C)

Where the marks are

  • Chooses option (C) (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 paper2025 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.