Unit 1.1 Test - PBS

1. When processing a crime scene, which is false?

• An accurate sketch is drawn, which includes a legend, scale and key
• Close up high quality diagrams are taken
• Physical evidence is not collected since we have good photos
• Interviews are performed to help establish theories

2. True or False: All living cells have DNA.

• True
• False

3. How do restriction enzymes cut DNA?

• Restriction enzymes separate fragments of DNA by size
• Restriction enzymes are from different bacteria.
• Restriction enzymes look for specific sequences in DNA to cut.
• Restriction enzymes do not cut DNA

4. Choose the phrase below that BEST describes the structure of DNA.

• DNA is a double-strand of bases that are held together by oxygen bonds.
• DNA is composed of nucleotides that rotate on it axis to form a helix
• DNA is made up of a single-strand of proteins twisted into a ladder
• DNA is a strand of nucleosides with sugar on the outside.

5. What does A represent for the following diagram?

• Keratin
• Cortex
• Cuticle
• Medulla

6. What does B represent for the following diagram?

• Keratin
• Cortex
• Cuticle
• Medulla

7. What does C represent for the following diagram?

• Keratin
• Cortex
• Cuticle
• Medulla

8. True or False: In the nucleus, the strands of DNA wind around proteins and condense into structures called histones.

• True
• False

9. Match the fingerprint

• Whorl
• Loop
• Arch

10. To determine if a substance at a crime scenes is blood or another substance, a test is performed to compare against a negative and positive control. This is an example of what type of test?

• ABO Test
• Confirmatory Test
• Presumptive Test
• Blood Test