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Model Paper 1 — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceModel Paper 11 Mark
MCQ
Which of the following is correct for the given figure?
Image
  • A
    The parts labelled 'a', 'b' and 'c', all possess photosynthetic pigments such as chlorophyll.
  • ✓
    The part labelled 'a' is the site of dark reaction.
  • C
    The part labelled 'c' is called granum
  • D
    The part labelled 'b' is called intergranal thylakoid
✓

Answer

Correct option: B.
The part labelled 'a' is the site of dark reaction.
(b) The part labelled 'a' is the site of dark reaction.
Explanation: The given figure is of chloroplast. The part labelled ‘a’ is stroma. The part labelled ‘b’ is called grana where
light reaction of photosynthesis takes place. The part labelled ‘c’ is intergranal thylakoid. Photosynthetic pigments such as
chlorophyll are present only in thylakoid membranes (grana + intergranal thylakoids) and not in stroma or nongranal
thylakoids.

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