biomed quiz

Question 1

Physiological responses

Answer 1

Change in any biological activities that may indicate that an individual may be lying

Question 2

Physiological responses examples

Answer 2

Heart rate, skin conductivity, respiratory rate, blood pressure.

Question 3

Forensics

Answer 3

Scientific tests or techniques used in connection with the detection of crime

Question 4

Polygraph testing

Answer 4

Use Sensors and computer software to record and display physiological changes as data - lie detector

Question 5

Trace evidence

Answer 5

Tiny fragments of physical evidence such as hairs, fibers from clothing, etc.

Question 6

Parts of hair

Answer 6

Cuticle- end part, cortex-near the middle, medulla- middle.

Question 7

Cortex

Answer 7

Cellular texture of cortex is identifying marker

Question 8

Medulla

Answer 8

Useful markers for identification, fragmented, continuous, opaque

Question 9

Cuticle

Answer 9

Lighter part of hair, thickness is useful identifying marker

Question 10

4 major fingerprint patterns

Answer 10

Arch, tented arch, loop, whorl

Question 11

What important evidence does a digital forensic specialist need

Answer 11

Phone, computer to get Texts, emails, gps locations, etc.

Question 12

Erythrocytes and function

Answer 12

Red blood cells, carry oxygen from lungs and deliver throughout body

Question 13

Leukocytes and function

Answer 13

White blood cells, fight infections and other diseases in body

Question 14

Thrombocytes and function

Answer 14

Platelets, small colorless cell fragments in blood that form clots and stop or prevent bleeding

Question 15

Plasma and function

Answer 15

Liquid base for blood, takes nutrients, horomones, and proteins to parts of body that need it

Question 16

Presumptive testing and example

Answer 16

Initial testing that suggests a sample may be blood by identifying it based on the properties of hemoglobin example kastle meyer, luminol, LCV

Question 17

Confirmatory test and example

Answer 17

Relies on unique properties of blood like structures on surface of red blood cells called antigens, confirm presence of blood at a scene. Ex. Blood typing agglutination

Question 18

Negative control kastle Meyer

Answer 18

Compare presumptive sample test to control to see if negative

Question 19

Positive control kastle Meyer

Answer 19

Compare presumptive sample test to positive control to see if positive

Question 20

Agglutination results

Answer 20

If antigen a is mixed with type AB or A, they will clump, if antigen b is mixed with type AB or B it will clump, any antigens mixed with type O will not clump

Question 21

Independent variable

Answer 21

Variable you change but it’s also controlled by you

Question 22

Dependent variable

Answer 22

What you observe changing

Question 23

Nucleotide

Answer 23

Building blocks of dna, made up of phosphate group, 1 sugar and 1 of 4 nitrogenous bases

Question 24

4 nitrogenous bases

Answer 24

Adenine, Thymine, Guanine, and Cytosine

Question 25

What bases always pair together

Answer 25

Adenine with thymine, guanine with cytosine

Question 26

Shape of DNA

Answer 26

Double helix

Question 27

Sources for DNA

Answer 27

Cells with a nucleus. Example, white blood cell, bone cell. Follicle of hair, etc. not red blood cell - no nucleus

Question 28

What does PCR do

Answer 28

Lab technique to make more copies of the same piece of DNA

Question 29

PCR process

Answer 29

Denaturation, annealing, extension, then repeat until desired amount, (don’t have to know words mean)

Question 30

DNA has two strands. if sequence of nucleotides of one stand is known, is it possible to know sequence of second strand

Answer 30

Yes, top strand is bottom strand but reversed, vice versa. Example: GGCC and bottom is CCGG

Question 31

Can you be framed by your own DNA

Answer 31

Yes, DNA could be taken from somewhere like a cup or napkin, hair, saliva etc. and someone can put it someone

Question 32

Gel electrophoresis

Answer 32

A gel made of agarose filled with dna in a tank with dna on negative side, tank turned on and as dna is negatively charged, dna goes to positive side and big dna molecules get stopped, sorting it.