The other object is a small charged sphere that is free to move (we neglect the force of. gravity on this sphere). According to Coulombâs law, these two like charges repel each. another. That is, the small sphere experiences a repulsive force away from the van de. Graaff sphere. Figure 2.2.2 (a) Two charges of the same sign that repel one another because of the. âstressesâ transmitted by electric fields.
Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (mRNA) by the enzyme RNA polymerase.
1 Transcribing DNA to MRNA Transcription refers to the synthesis of RNA (mRNA or tRNA) from a one strand of DNA. 2  Messenger RNA (mRNA) carries the genetic information from DNA to the ribosomes to syntheâ¦. 3  Transcription Termination Transcription termination is the last step in gene expression.