EDEXCEL A-Level Biology Topic 6: Forensics and Profiling Basics

What is the role of forensic entomology?

• Determining time of death based on body mass
• Determining time of death based on insect succession
• Determining time of death based on ambient temperature
• Determining time of death based on core temperature

What is the last step in gel electrophoresis?

• Cooling the DNA sample to 60 degrees
• Adding primers and DNA polymerase to the DNA sample
• Heating the DNA sample to 90 degrees
• Applying an electrical current to the gel

What causes rigor mortis?

• The breakdown of body cells
• The process of carbon recycling
• The production of lactic acid
• A decrease in core body temperature

Tags

NGSS.HS-LS1-7

What is the first step in PCR?

• Cooling the DNA sample to 60 degrees
• Adding primers and DNA polymerase to the DNA sample
• Heating the DNA sample to 75 degrees
• Heating the DNA sample to 90 degrees

What factors affect time of death analysis?

• Clothing and water submersion
• Cold temperatures and wind speed
• Warm temperatures and body fat
• All of the above

What is the purpose of PCR?

• To add free nucleotides to DNA strands
• To make fragments of DNA
• To produce multiple copies of DNA
• To separate DNA fragments based on size

What is the purpose of gel electrophoresis?

• To make fragments of DNA
• To produce multiple copies of DNA
• To separate DNA fragments based on size
• To add free nucleotides to DNA strands

What occurs during decomposition?

• The breakdown of body cells
• The decrease in core body temperature
• The production of lactic acid
• The stiffening of muscles and joints

Tags

NGSS.HS-LS2-6

What is algor mortis?

• The breakdown of body cells
• The stiffening of muscles and joints
• The process of carbon recycling
• The decrease in core body temperature

What do microorganisms do in the decomposition process?

• Absorb glucose and amino acids
• Break down organic matter into small soluble components
• Release carbon dioxide into the atmosphere
• All of the above

Tags

NGSS.MS-LS2-3