Most species of Gram-positive bacteria are
a. photoautotrophic.
b. photoheterotrophic.
c. chemoautotrophic.
d. chemoheterotrophic.
e. photochemoautotrophic.
Answer: d
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The activity of adenyl cyclase is influenced by
A. the presence of lactose in the environment. B. the phosphotransferase system. C. homoserine lactones. D. None of the choices are correct.
Differential RNA processing may result in:
A. a shift in the ratio of mRNA produced from two adjacent genes. B. inversion of certain exons in the mature mRNA. C. the production of the same protein from two different genes. D. the production of two proteins with different activities from a single gene.
Both strands of the short, double-stranded regulatory RNA molecules are required by the Slicer protein in order to target the complementary RNA for degradation
Indicate whether the statement is true or false
If the Earth were standing still (not rotating) and was a solid, uniform ball, wind directions would
A. run north and south. B. run east and west. C. cease. D. remain the same since the Earth's rotation does not affect wind directions.