Biological Evidence

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Biological Evidence

Back (Answer)

Blood Seminal fluid Vaginal secretion saliva urine touch DNA (skin cells)

Front (Question)

You will find biological evidence:

Back (Answer)

homicide sexual assault weapons assault (stabbing, shooting, fight)

Front (Question)

Forensic biology

Back (Answer)

preliminary examination of biological evidence in blood transfer and sexual assault cases Precursor for DNA analysis may also refer to forensic botany

Front (Question)

Forensic serology

Back (Answer)

preliminary examination and genetic typing of biological evidence in blood transfer and sexual assault cases before DNA analysis was available

Front (Question)

DNA typing developed in the

Back (Answer)

1980s

Front (Question)

blood typing

Back (Answer)

possible linkage, not individualization

Front (Question)

What is blood?

Back (Answer)

tissue liquid made up of water, cells, enzymes, proteins, glucose… circulates throughout the body

Front (Question)

Purpose of blood

Back (Answer)

supplies nutrients and oxygen in the body carries hormones and other ingested substances throughout the body removes waste

Front (Question)

Blood cells contained within blood:

Back (Answer)

red and white blood cells (they are very different)

#10

Front (Question)

Serum

Back (Answer)

straw colored liquid portion of blood that remains after whole blood has been allowed to clot contains dissolved proteins and antibodies

#11

Front (Question)

Plasma

Back (Answer)

straw colored liquid portion of blood that remains after blood cells have settled (NOT clotted) Contains clotting proteins

#12

Front (Question)

Red blood cells

Back (Answer)

have no nucleus not useful for DNA analysis

#13

Front (Question)

White blood cells

Back (Answer)

WBC have a nucleus Useful for DNA analysis

#14

Front (Question)

Platelets

Back (Answer)

Irregularly shaped colorless bodies Produced in the bone marrow Sticky surface lets them help form clots to stop bleeding active only when damage occurs to circulatory system walls

#15

Front (Question)

Amount of blood at a crime scene depends on:

Back (Answer)

active flow and passive flow

#16

Front (Question)

Active flow

Back (Answer)

the heart is still pumping example: injury to jugular - arterial spurting

#17

Front (Question)

Passive flow

Back (Answer)

no blood pressure Blood flow following death Example: gunshot to heart - blood pool near body

#18

Front (Question)

Hemoglobin

Back (Answer)

Found in RBC Peroxidase like activity Used as a basis for reactions with presumptive reagents

#19

Front (Question)

Blood Group Antigen

Back (Answer)

Found in RBC Bound to RBC membrane

#20

Front (Question)

DNA

Back (Answer)

Found in WBC Found in cells with nucleus

#21

Front (Question)

Proteins

Back (Answer)

Found in PLASMA Serum used in species testing

#22

Front (Question)

The first step in crime scene and evidence processing is:

Back (Answer)

recognition

#23

Front (Question)

Biological stains can be found:

Back (Answer)

literally anywhere

#24

Front (Question)

Biological stains can be:

Back (Answer)

wet dry singular evidence on other items of evidence