Because the nucleus of every cell in the human body contains the same genetic information.

Because the cheek cells are located near the cells of the eye and so they are able to exchange DNA.

Because all genes in the human body are expressed at all times so it is easy to study them. 

All of the above are possible explanations.

True

False

Step 2 = Denature; Step 4 = Anneal; Step 6 = Extend

Step 2 = Denature; Step 3 = Anneal; Step 4 = Extend

Step 3 = Denature; Step 4 = Anneal; Step 6 = Extend

Step 4 = Denature; Step 6 = Anneal; Step 7 = Extend

Template = Double stranded DNA

Primer = short fragment of RNA

Synthesis of the new DNA = template strand read in the 3' to 5' direction

It is used to denature proteins that were released from the cell.

It is used as the main buffer in the PCR reaction.

The swab containing cheek cells is swirled around in this buffer to collect the cells.

It is used to breakdown the cell membrane to release the DNA.

Milliliters 

Nanoliters

Liters

The plunger of the micropipette cannot be pushed down unless a disposable tip is attached.

The disposable tip prevents the formation of air bubbles, which can interfere with your measurements.

The disposable tip contains the volume markings and so without it measurements would be inaccurate.