Solution a: 45 solute particles and 90 solvent particles. solution b: 90 solute particles and 180 solvent particles. calculate the solute concentration and solvent concentration for each solution. show your work.

Solution A:

             No. of solute particles: 45

             No. of solvent particles:90

 Solute concentration = Amount of solute/total volume of solution X 100

                                                   = 45/135 x100

                                                    =33.3 %

solvent concentration=Amount of solute/total volume of solution X 100

                                                     =90/135 x100

                                                      = 66.6%

Solution B:

             No. of solute particles: 90

             No. of solvent particles:180

solute concentration = Amount of solute/total volume of solution X 100

                                                   = 90/270 x100

                                                    =33.3 %

solvent concentration=Amount of solute/total volume of solution X 100

                                                     =180/270x100

                                                      = 66.6%

Hope it helps!

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.