Signal sequences that direct proteins to the correct compartment are a. always removed once a protein is at the correct destination b. added to proteins through post-translational modification c. added to a protein by a protein translocator. d. encoded in the amino acid sequence and sufficient for targeting a protein to its correct dest

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.