DNA Typing Quiz

The technology of DNA typing had its beginnings in 1985 with the work of:

• Henry Lee

• Francis Crick

• James Watson

• Alec Jeffreys

Which nitrogenous base is NOT found in DNA?

• Thymine

• Cytosine

• Uracil

• Adenine

Which of the following depicts correct base-pairing in DNA?

• A-U

• G-A

• T-A

• C-T

The building blocks of the DNA molecule are known as:

• Amino acids

• Nucleotides

• Polysaccharides

• Hydrocarbons

PCR is a technique that:

• Provides a statistical analysis of the nitrogenous-base pairings.

• Can produce many exact copies of segments of DNA.

• Produces information regarding the sequence of nitrogenous bases.

• Virtually eliminates operator error from DNA analysis.

In the PCR process, the first step is to heat the DNA strands. This is to permit the:

• DNA to coil very tightly in the helical shape.

• Process to take place without DNA degradation.

• Hybridization to take place.

• Double-stranded molecules to separate completely.

Which is an advantage of working with short DNA fragments?

• They are more stable and less likely to break apart.

• Their quantity can be greatly amplified by PCR technology.

• They are less subject to degradation due to adverse environmental conditions.

• All of the above

STR analysis has replaced other DNA typing techniques because it:

• Is less subject to sample degradation.

• Requires a smaller sample size.

• Can be implemented using the PCR.

• All of the above

Which statement is FALSE? Few forensic labs do analysis of mtDNA because:

• Little mtDNA is present in a cell.

• The analysis procedure is very rigorous.

• It costs much more than nuclear DNA profiling.

• Such study takes a long time.

CODIS is a national system of:

• Computers to track the movement of sex offenders released from prison.

• Shared databases of DNA typing information from convicted felons and crime scene evidence.

• Vastly enhanced 911 emergency systems.

• Crime laboratory directors.