Place the following steps in order for motor control.
1. upper motor neurons stimulate lower motor neurons.
2. sensory information is relayed back to the cerebellum so movement can be modified if needed.
3. upper motor neurons in the premotor cortex select a motor program.
4. lower motor neurons stimulate a skeletal muscle to contract.
5. the basal nuclei enable the thalamus to stimulate upper motor neurons of the primary cortex.
a) 3, 5, 1, 2, 4
b) 2, 5, 3, 1, 4
c) 3, 5, 1, 4, 2
d) 5, 3, 1, 4, 2

The casefor proofs

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