Which of the following is not true of RNA processing?
A. RNA splicing can be catalyzed by spliceosomes.
B. Nucleotides may be added at both ends of the RNA.
C. Exons are cut out before mRNA leaves the nucleus.
D. A primary transcript is often much longer than the final RNA molecule that leaves the nucleus.
E. Ribozymes may function in RNA splicing.
Ans: C. Exons are cut out before mRNA leaves the nucleus.
You might also like to view...
If a virus enters the lytic phase in a host's cell, it will cause the host cell to
A. reject the virus. B. shrink because of the loss of cytoplasm that has been used in the synthesis of viral DNA. C. lysis due to the action of enzymes D. replicate itself at a higher than normal frequency. E. initiate an attack on the virus.
To which zoogeographical realm does the North American continent belong?
a. Palearctic b. Oceanian c. Neotropical d. Panamanian e. Nearctic
The conversion of solar energy into chemical
energy occurs during
a. glycolysis. b. photosynthesis. c. respiration. d. fermentation. e. chemosynthesis
Many European ecologists use a complex taxonomy of communities, based on a rigidly defined method of sampling plant species composition, which places each community in a hierarchy of types organized by their similarity. After whom is this system named?
A) R. H. Whittaker B) H. A. Gleason C) F. E. Clements D) J. Braun-Blanquet