What is the correct answer?


Consider the following statements and choose the correct statement.
  1. The endomembrane system includes mitochondria, chloroplast and peroxisomes.
  2. Smooth endoplasmic reticulum is the major site for synthesis of lipid.
  3. Rough endoplasmic reticulum is actively involved in protein synthesis.
  4. Mitochondrial matrix possesses single circular DNA, a few RNA and 80S ribosomes. Of the above statements.

A. (i) and (iii)

B. (ii) and (iv)

C. (iii) and (iv)

D. (ii) and (iii)

Correct Answer :

D. (ii) and (iii)

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 (70S) and the components required for the synthesis of proteins.

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