MCQ
Consider the following statements and choose the correct statement.

$(i)$ The endomembrane system includes mitochondria, chloroplast and peroxisomes.

$(ii)$ Smooth endoplasmic reticulum is the major site for synthesis of lipid.

$(iii)$ Rough endoplasmic reticulum is actively involved in protein synthesis.

$(iv)$ Mitochondrial matrix possesses single circular $DNA$, a few $RNA$ and $80\; s$ ribosomes.

Of the above statements.

  • A
    $(i)$ and $(iii)$
  • B
    $(ii)$ and $(iv)$
  • C
    $(iii)$ and $(iv)$
  • $(ii)$ and $(iii)$

Answer

Correct option: D.
$(ii)$ and $(iii)$
d
Statements $(ii)$ and $(iii)$ are correct. The endomembrane system include endoplasmic reticulum $(ER)$, golgi complex, lysosomes and vacuoles. Since the functions of the mitochondria, chloroplast and peroxisomes are not coordinated with the above components, these are not considered as

part of the endomembrane system. The mitochondrial matrix possesses single circular $DNA$ molecule, a few RNA molecule, ribosomes $(70\; S)$ and the components required for the synthesis of proteins.

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