Question

Amoeboid movement is a characteristic of Amoeba and human macrophages. It occurs when ectoplasm contracts to move endoplasm into a pseudopodium. This contraction of the ectoplasm appears to be caused by

• A. Sliding microtubules
• B. Contracting microfilaments
• C. Elongating cell walls
• D. Changes in turgor pressure

Answer 1

The correct option is B Contracting microfilaments

A pseudopodium is a temporary cytoplasmic projection from the cell. During ameoboid movements, the endoplasm moves in the direction of movement into one or more pseudopdia. At the tip of the pseudopodia, endoplasm is converted into ectoplasm and at the trailing edge ectoplasm is converted to endoplasm. Such contraction of the ectoplasm is caused by the contracting micro filaments and the proteins present in all the eukaryotic cells.