You have isolated the gene for a protein, nuculin (a protein that some people believe resides in the nuculus) that is normally localized to the nucleus. You locate in the gene the portion of the coding sequence that codes for the nuclear localization signal (NLS) and engineer it so that a positively charged amino acid in the signal is replaced by a nonpolar amino acid) You then insert the gene into some cells and observe where nuculin goes after its synthesis. What is the effect, if any?
a) Nuculin is not moved to the nucleus.
b) Nuculin is not made by the cell at all.
c) There is no effect.
d) Nuculin moves to the nucleus as it usually does.
Ans: a) Nuculin is not moved to the nucleus.
You might also like to view...
Which of the following statements about the botulism toxin is NOT true?
a. It is an exotoxin. b. It is produced by the bacterium Clostridium. c. It may be found as a contaminant in poorly prepared food. d. Its brand name is Botox. e. It causes muscles to contract.
Salmonella are
What will be an ideal response?
From what environment were Archaea first isolated?
a. from salt lakes b. from Mars c. from freshwater lakes d. from a human patient
Which nervous system is associated with rest and arousal?
-the Central Nervous System -the Autonomic Nervous System -the Somatic Nervous System -the Automatic Nervous System