Forensic Analysis of Diatoms Quiz Crafted By-
Ankit Tripathi
Introduction to Forensic Analysis of Diatoms
Diatoms have been used in forensic science in a variety of ways, the most frequent being the diagnosis of death by drowning. When a person drowns, water will enter the lungs and then enter the bloodstream through ruptures in the peripheral alveoli before being carried to the other organs such as the liver and heart. Naturally, the microscopic contents of the water, which will include diatoms, will pass into the blood as well. The detection of diatoms in the organs can contribute to a diagnosis of death by drowning, a process referred to as the ‘diatom test’.
Let's look at the questions and their answers.
Ques 1. Which of the following statements is not correct regarding diatoms?
a) Diatoms are aquatic unicellular plant
b) Diatoms have an extracellular coat composed of magnesium
c) Acid digestion technique is used to extract diatoms
d) Presence of diatoms in the femoral bone marrow is an indication of antemortem inhalation of water
Answer- b) Diatoms have an extracellular coat composed of magnesium
Ques 2. For diatoms, the best site for taking the sample is
a) Bone Marrow
b) Kidney
c) Muscles
d) Lungs
Answer- a) Bone Marrow
Ques 3. What is the main form of nutrition for diatoms?
a) Branching
b) Plant Material
c) Symmetry
d) Photosynthesis
Answer- d) Photosynthesis
Ques 4. Diatom’s skeleton called as:
a) Cover
b) Shell
c) Frustule
d) Exoscutum
Answer- c) Frustule
Ques 5. Centric discoid form of diatoms is__________?
a) Coscinodiscus
b) Stephanodis
c) Diplaneis
d) Camphyloneiscus
Answer- a) Coscinodiscus
Ques 6. Diatoms belong to
a) Bacillariophyceae
b) Xanthophyceae
c) Chrysophyta
d) Both a & c
Answer- d) Both a & c
Ques 7. Cell wall in diatoms is made of
a) Silica
b) Pectin
c) Cellulose
d) Chitin
Answer- a) Silica
Ques 8. Diatoms are major producers and form aquatic
a) Oxygen
b) Nitrogen
c) Food Chain
d) Food
Answer- c) Food Chain
Ques 9. How would you be most likely to see diatoms with the naked eye?
a) Swimming in schools
b) Never see with naked eye
c) Colonies on the seabed
d) Coating a rock or hard surface
Answer- d) Coating a rock or hard surface
Ques 10. Diatoms store food is
a) Oil
b) carbohydrate
c) Fructose
d) Glucose
Answer- a) Oil