A component of a circuit changes, as shown below.

At left a short horizontal line then a small circle with a line pointing up at about 45 degrees then a short gap then a small circle then a short horizontal line. In the middle an arrow pointing right. At right a short horizontal line then a small circle then a shorter horizontal line then a small circle then a short horizontal line.

How would this change affect the electric circuit?

A switch is closed, so the circuit would be incomplete and broken and the lights in the circuit would not shine.
A switch is closed, so the circuit would be complete and unbroken and the lights in the circuit would shine.
A switch is opened, so the circuit would be incomplete and broken and the lights in the circuit would not shine.
A switch is opened, so the circuit would be complete and unbroken and the lights in the circuit would shine.

The basic repeating unit of nucleic acids are known as nucleotides. a nucleotide consists of three distinct chemical groups.

Where are the phrases

Proteins are the workhorses of the cell, controlling virtually every reaction within as well as providing structure and serving as signals to other cells. proteins are long chains of  amino acids  , and the exact sequence of the amino acids determines the final structure and function of the protein. instructions for that sequence are encoded in  genes  . to make a particular protein, a messenger ribonucleic acid (mrna) copy is made from the gene (in the process called  transcription  ), and the mrna is transported to the  ribosome  . protein synthesis, also called  translation  , begins when the two ribosomal subunits link onto the mrna. this step, called initiation, is followed by elongation, in which successive amino acids are added to the growing chain, brought in by transfer rnas (trnas). in this step, the ribosome reads the  nucleotides  of mrna three by three, in units called  codons  , and matches each to three nucleotides on the trna, called the anticodon. finally, during termination, the ribosome unbinds from the mrna, and the  amino acid  chain goes on to be processed and folded to make the final, functional protein