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Life Processes — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceLife Processes1 Mark
MCQ
For two statements are given $-$ one labelled Assertion $(A)$ and the other labelled Reason $(R)$. Select the correct answer to these questions from the codes $\ce{(a), (b), (c)}$ and $(d)$ as given below :
Assertion : Most of the living organisms carry out aerobic respiration.
Reason : Mitochondria is the site of aerobic respiration in the cell.
  • A
    Both $A$ and $R$ are true and $R$ is correct explanation of the assertion.
  • ✓
    Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
  • C
    $A$ is true but $R$ is false.
  • D
    $A$ is false but $R$ is true.
✓

Answer

Correct option: B.
Both $A$ and $R$ are true but $R$ is not the correct explanation of the assertion.
Most of the living organisms carry out aerobic respiration. For example human, dogs, cats, lions, deer, birds, lizards, grasshopper, etc. and most of the plants carry out aerobic respiration by using oxygen of air. The first step of breakdown of glucose into pyruvic acid occurs in cytoplasm. Aerobic breakdown of pyruvic acid takes place in mitochondria.

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