The inner membrane of mitochondria contains more than 151 different polypeptides, and has a very high protein-tophospholipid ratio.

Correct Option: B

The inner membrane of mitochondria contains more than 151 different polypeptides, and has a very high protein-tophospholipid ratio.

Except peroxisome the remaining three and ER are the parts of endomembrane system.

Correct Option: B

Except peroxisome the remaining three and ER are the parts of endomembrane system.

Plasmodesmata are the structures present between two adjacent cells that permits the transport and communication between them. They are the fine cytoplasmic strands that connect the protoplasts of adjacent plant cells by passing through the cell walls.

Correct Option: A

Plasmodesmata are the structures present between two adjacent cells that permits the transport and communication between them. They are the fine cytoplasmic strands that connect the protoplasts of adjacent plant cells by passing through the cell walls.

Under electron microscope the nucleosomes appear as beads on a string in chromosome, due to a short length of DNA wrapped around a core of histone proteins.

Correct Option: C

Under electron microscope the nucleosomes appear as beads on a string in chromosome, due to a short length of DNA wrapped around a core of histone proteins.

The main arena of various types of activities of a cell is cytoplasm. It forms the living protoplasm of a cell excluding the nucleus. It consists of proteins, fats, carbohydrates, nucleic acids, vitamins, waste metabolites and all organelles.

Correct Option: C

The main arena of various types of activities of a cell is cytoplasm. It forms the living protoplasm of a cell excluding the nucleus. It consists of proteins, fats, carbohydrates, nucleic acids, vitamins, waste metabolites and all organelles.