. Which of the following statements is false? a) If two genes are to be expressed in a cell, these two genes can be transcribed with different efficiencies. b) RNA polymerase is responsible for both unwinding the DNA helix and for catalyzing the formation of the phosphodiester bonds between nucleotides. c) RNA has a uracil base and a ribose sugar. d) Some types of RNA have modified bases such as pseudouracil (Y), 5-methylcytosine, etc