Marzooq, an ex-MP and a senior figure in the main Al-Wefaq opposition formation who was arrested on September 17, appeared in court in the presence of his lawyers and observers from several foreign embassies.
On October 5, the general prosecutor charged Marzooq with "promoting acts that amount to terrorist crimes" and of using his position in Al-Wefaq, a legal association, to "call for crimes that are considered terror acts under the law."
A statement charged that Marzooq had raised the flag of the clandestine group at a public rally after it was handed to him by a masked man.
On September 29, a court sentenced 50 Shiites including a top Iraqi cleric, to up to 15 years in jail for forming the February 14 Coalition, which is blamed for most of the confrontations between security forces and members of Bahrain's Shiite majority.
At least 89 people have been killed in Bahrain since Arab Spring-inspired pro-democracy protests erupted in February 2011, according to the International Federation for Human Rights.
Bahrain, a strategic archipelago just across the Gulf from Iran, is the home base of the US Fifth Fleet and Washington is a long-standing ally of the ruling Al-Khalifa dynasty.
