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Course: Edexcel A Level Biology A (SNAB) 9BI0
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Edexcel A Level Biology A (SNAB) 9BI0

Topic 1 · Lifestyle, Health and Risk

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Topic 2 · Genes and Health

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Topic 3 · Voice of the Genome

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Topic 4 · Biodiversity and Natural Resources

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Topic 5 · On the Wild Side

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Topic 6 · Immunity, Infection and Forensics

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Topic 7 · Run for your Life

0/55

Topic 8 · Grey Matter

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Quiz

6.2 Forensics – Check yourself

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Forensics Edexcel A Level Biology SNAB check yourself quiz: free practice for Edexcel A Level Biology A (snab) 9BI0. Work through this Forensics Edexcel A Level Biology SNAB check yourself quiz and get instant feedback on every answer. If you get stuck, review the 6.2 Forensics — 9BI0 Notes lesson. More practice: Edexcel A Level Biology A (snab) 9BI0 — all units. Syllabus: Pearson Edexcel A Levels.

  • Questions count: 10
  • Passing grade: B
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1.

Time of death can be estimated from

hair colour
blood group
height
body temperature, degree of muscle contraction, extent of decomposition and forensic entomology
2.

Rigor mortis occurs because

muscles relax
the body warms
ATP runs out, so muscle fibres remain contracted
blood clots
3.

Forensic entomology uses

pollen in the hair
tree rings
the stages of insect life cycles on the body
fingerprints
4.

The role of microorganisms in decomposition is to

preserve the body
prevent decay
break down organic matter, recycling carbon
produce oxygen
5.

PCR is used in forensics to

cut DNA
separate DNA fragments
stain DNA
amplify small samples of DNA
6.

In DNA profiling, fragments are separated by

PCR
centrifugation
chromatography of proteins
gel electrophoresis according to size
7.

DNA profiles differ between individuals because

everyone has different genes
the number of repeats in short tandem repeats (STRs) varies
DNA is random
proteins differ
8.

DNA profiling can be used to

measure body temperature
identify individuals and determine genetic relationships
estimate time of death
identify blood group only
9.

After death, body temperature

rises steadily
falls following a sigmoid curve until it reaches the ambient temperature
stays constant
falls instantly
10.

Identical twins have

different DNA profiles
no STRs
different numbers of chromosomes
identical DNA profiles
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Part of Topic 6 · Immunity, Infection and Forensics — see every lesson and quiz in this unit.
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