Final answer:
More start and stop transfer sequences may be needed if a protein passes the membrane more than once.
Step-by-step explanation:
True. More start and stop transfer sequences may be needed if a protein passes the membrane more than once. When a protein passes through the membrane multiple times, each pass requires a stop-transfer sequence to trap the protein in the fatty acid interior of the membrane. These sequences help anchor the protein in the membrane and prevent it from fully crossing the membrane.