Question

The diagram of the ultra-structure of a plant cell is given below. Identify the function of the organelles labelled A, B, C, D, E, in the diagram.

• A. A-Site of photophosphorylation, B-Storage of cell sap, C-Intracellular transport, D-Site of oxidative phosphorylation, E-Principal director of macromolecular traffic
• B. A-Storage of cell sap, B-Site of oxidative phosphorylation, C-Principal director of macromolecular traffic, D-Site of photophosphorylation, E-Intracellular transport
• C. A-Intracellular transport, B-Site of oxidative phosphorylation, C-Principal director of macromolecular traffic, D-Site of photophosphorylation, E-Storage of cell sap
• D. A-Principal director of macromolecular traffic, B-Site of oxidative phosphorylation, C-Intracellular transport, D-Site of photophosphorylation, E-Storage of cell sap

Answer 1

Answer: (D)

A-Principal director of macromolecular traffic, B-Site of oxidative phosphorylation, C-Intracellular transport, D-Site of photophosphorylation, E-Storage of cell sap

Golgi body is said to be “the principal director of macromolecular traffic in cell”. It chemically modify and transport the materials received by it. Golgi apparatus contains phospholipid, proteins, enzymes and vitamin C.

Mitochondria is bound by 2 unit membrane outer membrane is permeable while inner membrane is impermeable and is folded into a number of finger like cristae. Cristae word coined by Palade. Inner membrane have electron acceptors arranged in a definite sequence and form electron transport system. Inner membrane is studded with pin head particles called oxysomes or elementary particles or F1 particles. Oxysomes composed of ATPase enzymes and concerned with Oxidative phosphorylation.

Intracellular transport is the movement of vesicles and substances within the cell.

Photophosphorylation occurs in chloroplasts.

The liquid inside the large central vacuole of a plant cell that serves as storage of materials and provides mechanical support, especially in non-woody plants. It has also a vital role in plant cell osmosis.