A mechanism of gene regulation that controls the amount of mRNA available for translation is called ____________________
Fill in the blank(s) with correct word
RNA interference
RNAi
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Which of the following statements about meristems is false?
A. Meristems contain a mixture of differentiated and undifferentiated cells. B. Meristems consist of cells that repeatedly undergo mitosis. C. Meristems are found at the tips of stems. D. Meristems are found at the tips of roots. E. Growth only occurs at meristems and not in other regions of the plant body.
Bilateral symmetry is characteristic of:
a. cnidarians b. sponges c. jellyfish d. flatworms e. coral polyps
Spliceosomes are composed of _____.
a. small RNAs and proteins b. polymerases and ligases c. introns and exons d. the RNA transcript and protein
When the ribosome reaches a stop codon on the mRNA, no corresponding tRNA enters the A site. If the translation reaction were to be experimentally stopped at this point, which of the following would you be able to isolate?
A. an assembled ribosome with a separated polypeptide B. separated ribosomal subunits, a polypeptide, and free tRNA C. an assembled ribosome with a polypeptide attached to the tRNA in the P site D. a cell with fewer ribosomes E. separated ribosomal subunits with a polypeptide attached to the tRNA