A collection of genes or operons controlled by a common regulatory protein is called a(n) ________.
Fill in the blank(s) with the appropriate word(s).
regulon
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Vertebrate skeletons are composed exclusively of rigid elements
A. true B. false
Which of the following statements regarding Fas-mediated programmed cell death is false?
A) Fas ligand binding with Fas receptor stimulates a specific G protein. B) Fas ligand and receptor interaction results in the recruitment of adaptor proteins in the target cell. C) Capases are activated in the process. D) The caspase cascade results in the cleavage of the proteins within the target cell. E) It ultimately results in death of the cell.
The definitive host of a parasite is
A) the host for immature stages of the parasite. B) where the mature form of the parasite occurs. C) also the vector for the parasite. D) the host that the parasite name is based on. E) the host for the dormant stage of the parasite.
Of the three types of muscle tissue, which has multinucleated fibers?
A. both smooth and skeletal muscles B. both cardiac and smooth muscles C. smooth muscle D. skeletal muscle E. cardiac muscle