Final answer:
BAX, BID, BAD, and BAK are all pro-apoptotic factors that are part of the Bcl-2 family and regulate programmed cell death.
Step-by-step explanation:
The proteins mentioned in the question, BAX and BAK, are both part of the Bcl-2 family and are known as pro-apoptotic factors. When they are signaled, they form outer mitochondrial membrane channels that allow the release of cytochrome c into the cytoplasm. This release is a crucial step in apoptosis, which is a form of programmed cell death. In contrast, BID is a pro-apoptotic BH3-only member, which can be cleaved into a truncated form (tBID) initiating the apoptotic process. BAD is also a member of the Bcl-2 family, functioning as a pro-apoptotic protein when it is not phosphorylated. Together, these proteins help to regulate the cell cycle and induce apoptosis in response to certain signals, ensuring the removal of damaged or unneeded cells.
Therefore, the answer to the question "BAX, BID, BAD, BAK are anti or pro-apoptotic?" would be b. Pro-apoptotic.