Which of the following statements about mRNAs and microRNAs is false?
A. Both are transcribed by RNA Pol II.
B. Both are capped and polyadenylated.
C. Both undergo nucleolytic cleavage in the nucleus and the cytoplasm.
D. Both are processed via interaction with snoRNPs.
D
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What is production efficiency?
A. The rate of photosynthetic fixation as a function of temperature. B. The percentage of energy assimilated by an organism that becomes new biomass. C. The amount of energy used by organisms at every node of a food web. D. Consumption of primary production by the second and third levels of a food web. E. The net gain to an ecosystem based on photosynthetic production.
Oligotrophic waters are usually hypoxic
Indicate whether this statement is TRUE or FALSE.
What is the main role of kidneys?
A. To filter blood and remove toxins from it B. To secrete hormones that help in osmoregulation C. To secrete enzymes that help in digestion D. To replenish oxygen in the bloodstream
Which type of microscopy enhances and amplifies slight changes in the phase of transmitted light?
A) differential interference contrast microscopy B) digital video microscopy C) fluorescence microscopy D) phase-contrast microscopy E) both differential interference contrast microscopy and phase-contrast microscopy