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During cellular… (Class 10 Science SQP 2024-25, Q8)

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ScienceCBSE Class 10 · Sample paper, session 2024-25 · 1 mark · MCQ

CBSE Class 10 Science sample paper 2024-25: question 8

From the official CBSE sample question paper for 2024-25, 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

During cellular oxidation of Glucose, ATP is produced along with formation of other products in this reaction. Which of the following events is associated with production of maximum ATP molecules per molecule of Glucose during this process? Synthesis of

  1. (A)ethanol in yeast
  2. (B)lactic acid in muscle cells
  3. (C)carbon dioxide in yeast cells
  4. (D)carbon dioxide in human cells

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2024-25.

Hints

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

Hint 1

Does aerobic or anaerobic respiration release more energy?

Hint 2

Carbon dioxide in yeast comes from fermentation, which is anaerobic.

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. Ethanol formation in yeast and lactic acid formation in muscles are anaerobic. They release very little energy (2 ATP per glucose).

    ½ mark

  2. In human cells, aerobic respiration in the mitochondria breaks pyruvate completely into and water. This gives the maximum ATP. The answer is option (D).

    ½ mark

Answer: Carbon dioxide in human cells; option (D)

Where the marks are

  • Links maximum ATP to aerobic respiration in human cells and chooses (D) (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 2024-25: 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.