On which part of a "classic neuron" is the action potential initiated?

The classic neuron is referred to a nerve cell. It is divided into three regions, cell body axon and axon terminal. The cell body is a disc like structure having many projections, known as dendrites. The cell body is attached to a long thin extension called axon. Axon's one side is connected to cell body and on the other side it has axon tail, which also possess dendrites. The axon is covered with an insulating covering called myelin sheath.

At the junction of cell body and the axon, a pointed unmyelinated axon hillock is present. It is cone shaped, it is the spike initiation zone and the action potential is generated here.  

So, the correct answer is axon hillock.

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'