The human body has natural steroids, a type of lipid. what is the function of steroids in the human body? a. they store extra energy in the body. b. they build cell membranes. c. they carry chemical messages throughout the body. d. they prevent water loss from the body.

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.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

its temperature is increasing. this causes molecular vibrations to increase.