Which of the following is true of objects falling with air resistance?
O
A. When air resistance is considered, the acceleration of a falling
object depends on the object's shape and mass.
B. When air resistance is considered, all objects falling near Earth's
surface accelerate at the same rate.
C. When air resistance is considered, lighter objects always
accelerate faster than heavier objects as they fall.
O
D. When air resistance is considered, heavier objects always
accelerate faster than lighter objects as they fall.

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.