Forensic DNA #1

DNA is a molecule composed of repeating units called:

• Nucleic Acids

• Nucleotides

• Deoxyribose Sugars

• Phosphates

What are the three parts of a nucleotide?

• Salt, Phosphide, Magnesium Base

• Sugar, Phosphide, Nitrogen Base

• Sugar, Phosphate, Neon Base

• Sugar, Phosphate, Nitrogen Base

What is the shape of a DNA molecule called?

• A helix

• A double helix

• Nitrogenous

• Helical

What is the purpose of DNA?

• To transfer genetic information from parents to offspring

• Controls an organism's development of characteristics

• Provides instructions for making proteins

• All of the above

Which is true?

• Humans have 36 chromosomes

• Each gene comes in pairs of two

• Each chromosome contains hundreds of genes

• An allele is an identical form of a gene

Where is DNA located within the cell?

• Within the cell membrane

• Floating freely in the cytoplasm

• Inside of the nucleus

• Inside the ribosome

What is the purpose of PCR?

• To copy small amounts of DNA into larger molecules for analysis

• To break open the nucleus and release DNA

• To match suspect DNA samples to a crime scene

• To compare samples from multiple suspects

What is denaturation?

• Copying small pieces of DNA into larger sections

• The separation of DNA strands through decreased temperatures

• The separation of DNA strands through increased temperatures

• Breaking down of the nucleus for DNA removal

What is annealing?

• The separation of the two strands of DNA

• The binding of DNA sequences

• Creating new strands of DNA

• Releasing DNA from a cell for analysis

What is extension?

• The creation of new strands of DNA using Taq polymerase

• Making DNA longer

• Breaking down a DNA strand using Taq polymerase

• Making DNA shorter