Explain why some proteins are made by nearly all cells and give two examples

I put they are needed for basic cell life but I don't know what two examples to put

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Proteins are essential macromolecules that carry out a wide range of functions in living organisms. There are certain proteins that are made by nearly all cells regardless of their specific function or location in the body. These proteins are often referred to as "housekeeping proteins" or "constitutive proteins."

The reason why these proteins are universally produced by cells is because they play crucial roles in basic cellular functions that are necessary for the survival and proper functioning of all cells. These functions include maintaining structural integrity, facilitating energy production, regulating gene expression, and participating in cellular signaling pathways.

Here are two examples of proteins that are made by nearly all cells:

1. Actin: Actin is a protein that forms filaments and is a fundamental component of the cytoskeleton - the internal framework of a cell. It provides structural support and helps maintain the cell's shape. Additionally, actin is involved in important cellular processes such as cell division, cell migration, and muscle contraction.

2. Enzymes involved in glycolysis: Glycolysis is the metabolic pathway responsible for the breakdown of glucose to produce energy in the form of ATP. Several enzymes involved in this pathway, such as hexokinase, phosphofructokinase, and pyruvate kinase, are produced by almost all cells. These enzymes play a vital role in energy production and are necessary for the cells' survival.

To determine two examples of proteins made by nearly all cells, you can refer to commonly known proteins that fulfill essential cellular functions. Examples include proteins involved in cellular metabolism, structural proteins, proteins required for DNA replication, or proteins involved in basic cellular processes like transcription and translation.