Question 15

Lysosomes contribute to phagocytosis in white blood cells.

Lysosomes play a crucial role in phagocytosis by containing digestive enzymes that break down pathogens engulfed by white blood cells. This process is essential for the immune response, allowing the body to eliminate harmful microorganisms.

A) Endoplasmic Reticulum (ER)

The Endoplasmic Reticulum (ER) is primarily involved in protein and lipid synthesis, as well as the processing of these molecules. It does not have a direct role in phagocytosis, as it is not involved in the digestion or breakdown of engulfed materials.

B) Lysosomes

Lysosomes are specialized organelles that contain hydrolytic enzymes necessary for the degradation of macromolecules. They are essential in phagocytosis as they fuse with phagosomes to digest engulfed pathogens and debris, making this option the correct answer.

C) Vacuole

Vacuoles are involved in storage and transport within the cell, but they do not have the enzymatic capabilities necessary for digestion. While they may participate in the process of phagocytosis by containing ingested material, they do not directly contribute to the breakdown of these substances.

D) Golgi apparatus

The Golgi apparatus is responsible for modifying, sorting, and packaging proteins for secretion or delivery to other organelles. It does not engage in phagocytosis or the digestion of materials, making it unrelated to the process in question.

Conclusion

Lysosomes are clearly identified as the organelles that facilitate the digestion of engulfed substances during phagocytosis in white blood cells, making them essential for immune function. In contrast, the other options fail to directly contribute to this process, highlighting the unique role of lysosomes in cellular defense mechanisms.