**Golgi Body Synthesis in the Cell Cycle**

The Golgi apparatus, also known as the Golgi body or Golgi complex, is an essential organelle involved in the processing, packaging, and sorting of proteins and lipids in eukaryotic cells. The Golgi body is composed of a series of flattened membranous sacs called cisternae.

The synthesis of the Golgi body occurs during a specific phase of the cell cycle known as the G1 phase. The G1 phase is the first phase of the cell cycle, which occurs after cell division (mitosis) and before DNA replication (S phase). During this phase, the cell grows in size, synthesizes proteins, and prepares for DNA replication.

**Reasons for Golgi Body Synthesis in G1 Phase**

1. **Protein Synthesis**: The Golgi body is responsible for modifying, sorting, and packaging proteins synthesized in the endoplasmic reticulum (ER). During the G1 phase, the cell actively synthesizes proteins required for growth and normal cellular functions. Therefore, the Golgi body needs to be synthesized to process and transport these newly synthesized proteins to their appropriate destinations.

2. **Membrane Biogenesis**: The Golgi body is involved in the synthesis of membranous structures, such as vesicles and lysosomes. These structures play crucial roles in cellular processes, including endocytosis, exocytosis, and intracellular transport. During the G1 phase, the cell prepares for DNA replication and subsequent cell division. The Golgi body needs to be synthesized to provide membranes for the formation of new organelles and to maintain cellular homeostasis.

3. **Cellular Signaling**: The Golgi body is also involved in the synthesis and modification of glycoproteins and glycolipids, which are crucial for cellular signaling and cell-cell interactions. During the G1 phase, the cell undergoes growth and prepares for DNA replication. The Golgi body needs to be synthesized to ensure proper glycosylation and processing of these signaling molecules, which are important for normal cellular functions and communication.

In summary, the synthesis of the Golgi body occurs during the G1 phase of the cell cycle. This phase is characterized by active protein synthesis, membrane biogenesis, and cellular signaling. The Golgi body is essential for these processes, as it is involved in protein processing, membrane formation, and glycosylation of signaling molecules. Therefore, the synthesis of the Golgi body during the G1 phase ensures proper cellular growth, function, and preparation for subsequent phases of the cell cycle.