Question

In which cell would you find the most rough ER?

a. pancreatic cell that secretes digestive enzymes
b. ovarian cell that produces estrogen (a steroid hormone)
c. muscle cell in the thigh of a long-distance runner
d. white blood cell that engulfs bacteria

Answer 1

The cell with the most rough ER is the pancreatic cell that secretes digestive enzymes due to its role in synthesizing and modifying proteins for secretion, which are processes closely associated with the rough ER.

Step-by-step explanation:

In which cell would you find the most rough ER? The answer is a pancreatic cell that secretes digestive enzymes. The rough endoplasmic reticulum (rough ER or RER) is studded with ribosomes and is involved in the synthesis and modification of proteins, including enzymes that are secreted from the cell. Pancreatic cells are known for their high level of protein secretion, particularly digestive enzymes, making them rich in rough ER.

This is supported by transmission electron micrographs that illustrate the abundance of rough ER in pancreatic cells. In contrast, ovarian cells produce steroid hormones (smooth ER function), muscle cells are not primarily focused on protein secretion, and white blood cells engulf bacteria rather than secrete proteins.

Answer 2

The cell with the most rough endoplasmic reticulum (RER) would be a pancreatic cell that secretes digestive enzymes because it is highly active in protein synthesis and secretion.

Step-by-step explanation:

In determining the type of cell that contains the most rough endoplasmic reticulum (RER), it's important to understand the function of this cellular structure. The RER is involved in the modification and packaging of proteins for secretion. Therefore, a cell type that is highly active in secreting proteins, such as enzymes, will have a more abundant RER. In this context, a pancreatic cell that secretes digestive enzymes will have a greater concentration of RER compared to an ovarian cell producing estrogen, a muscle cell in the thigh of a long-distance runner, or a white blood cell that engulfs bacteria. This is due to the high level of protein (enzyme) synthesis and secretion required by the pancreatic cell to aid in the digestive process.