Final answer:
Cells treated with cytochalasin D are inhibited in actin polymerization but can still perform motor-driven activities such as muscle contraction and various metabolic processes not directly involving actin.
Step-by-step explanation:
Cytochalasin D is a drug known to prevent actin polymerization. Actin polymerization is a process vital for various cellular activities including cell motility, muscle contraction, and the formation of temporary structures like pseudopodia. However, even with the inhibition of actin filament formation, cells treated with cytochalasin D can still engage in motor-driven activities unrelated to actin dynamics.
These activities include processes powered by molecular motors such as myosin, which can still bind to existing actin filaments and perform functions like muscle contraction. Additionally, cellular functions that do not directly involve actin, such as DNA replication and certain metabolic processes, would also continue in the presence of cytochalasin D.