When performing cpr on an adult, you should push the chest at least inches deep?

The correct answer is 2 inches.

Explanation:

Cardio-Pulmonary Resuscitation or CPR is a simple procedure performed on the person who suddenly goes into a cardiac arrest. This cardiac arrest stops the heart thus pumping of the blood due to which oxygen does not reach the brain and other parts of the body.

So, CPR is given ensuring two main steps :

1. Chest compression- Chest of the patient is compressed by placing the twisted hands between nipples and pushed to about 2 inches or 5 cm because deeper then this depth may damage the internal organs.

2. Rescue breathing.

Thus, 2 inches is the correct answer.

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."