Which of the following is a way that protein function can be modified AFTER translation?
A) protein cleavage
B) transcription regulation
C) gene duplication
D) exon shuffling
E) gene rearrangement
A) protein cleavage
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Which of these is the best description of a virus?
A. chemical complexes of RNA or DNA protected by a protein shell B. a member of the kingdom Virusae C. the smallest bacteria known D. a noncellular living organism E. an invasive cell that cannot stop reproducing
The primary function of the endosperm is
a. protection. b. reproduction. c. growth. d. food storage. e. water absorption.
The Montreal Protocol:a
has not yet resulted in measurable decreases in the quantity of global warming chemicals. b. has not yet been ratified by the U.S. Senate. c. banned global use of CFCs by 1998. d. was signed by all 50 states.
e. limited production of CFCs.Stem cell research is important because __________.
A. it is aimed at treating the whole person—body and mind. B. stem cells can be used to generate virtually any type of specialized cell in the human body. C. it is essential to various types of preventive medical approaches. D. it is the only area of research that does not involve controversies.