Endorphins
Endorphins
are known to be body natural painkiller; they are produced by the central nervous
system and the pituitary gland. Endorphins interact with receptors (opiate) in
the brain to other to reduce the perception of pain and they act similarly to
drug s such as codeine and morphine.
Answer:
Because tornadoes form in Cumulonimbus clouds, the same clouds that produce thunderstorms.
The best answer is C - DNA is heated to separate the strands.
PCR proceeds in three steps.
1. Denaturation - The DNA strands, which are bound together in the double helix, must be separated to allow replication to take place so the first step of PCR is to separate them. This is done by heating up the sample, breaking the hydrogen bonds between the strands.
2. Annealing - sample is cooled just enough to allow primers to bind to the ends of each of the two template strands.
3. Extension - DNA polymerase attaches to the primers and makes a copy of each template strand.