Understanding PCR and Its Application in Crime Scene Investigation

What is the main purpose of using PCR in crime scene investigations?

• To destroy DNA evidence

• To amplify small amounts of DNA

• To change the DNA sequence

• To create synthetic DNA

Which of the following is NOT a component required for PCR?

• DNA sample

• RNA polymerase

• Primers

• Nucleotides

What is the role of Taq polymerase in PCR?

• It acts as a primer

• It synthesizes new DNA strands

• It cools down the reaction

• It breaks down DNA strands

During PCR, what happens when the temperature is raised?

• Nucleotides are removed

• Primers are attached

• DNA strands are synthesized

• Hydrogen bonds between DNA strands break

How many copies of DNA can be produced after 30 cycles of PCR?

• A few million

• A few hundred

• A few thousand

• Over a billion