umuc-biol320-final-exam-latest-2015-winters-code

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BIOL 320 Final
Exam

The written take home final examination represents the
final assessment for this class. This
exam is worth 26 points. Failure to submit this timed final exam document to your assignment
folder within the time period will result in your exam not being accepted.Use of your, notes, or other resources is
strongly discouraged.

1.
Place the parts of the
scientific method in the best order (0.5 pt).

2.
A validation procedure must be .
(1.5 pts)

3.
In a Punnett square, the
letters that line the outside of the box represent (0.5 pt):

a.
Offspring genotypes

b.
Parental genotypes

c.
Gametes

d.
Offspring phenotypes

4.
Fill in the following Punnett
square (0.5 pt):

A

b

A

AA

Ab

b

Ab

bb

Using the
Punnett square above, if AA=brown eyes, Ab= hazel eyes, and bb= green eyes, there
is a 50% chance the offspring of these parents will have what color eyes (0.5
pt)?

a.
Brown

b.
Hazel

c.
Green

5.
True/False: Fingerprints are developed during the early
stages of fetal development. (0.5 pt)

6.
Latent fingerprints are
composed of the sweat and oils of the body that are transferred from the ridge
pattern to some substrate where they persist for some time until found by one
of numerous visualizing techniques. (0.5

7.
How many permanent teeth are
typically found in a human mouth (0.5 pt)?

a.
18

b.
32

c.
30

d.
36

8.
Which of the following is a use
of forensic entomology? (0.5 pt)

a.
Obtaining human DNA from the
victim’s flesh digested by the insect.

b.
Determining the cause of death.

c.
Calculating the PMI.

d.
Determining the quantity of
ingested toxins and drugs from the analysis of insect body parts.

e.
All of the above.

f.
None of the above.

9.
Which of the following is not a
characteristic of rigor mortis? (0.5 pt)

a.
Upon death, the membranes of
muscle cells become more permeable to calcium ions.

b.
Rigor mortis first starts with
small muscles in the face and these muscles are the last to relax after several
days.

c.
The rate of rigor mortis is
independent upon the victim’s activity and the victim’s age.

d.
Rigor mortis in and of itself
cannot always be a reliable predictor of time since death.

10.
Unless the manner of death can
not be determined, a forensic pathologist will usually declare one of the
following as the manner of death.
(2 pts)

11.
Briefly describe how the phenolphthalein
reaction works. (0.5 pt)

12.
True/False: Amy2 is the “Salivary
Locus” responsible for amylase detected in saliva, sweat, nasal secretions,
breast milk, and Amy1 is the “Pancreatic Locus” responsible for amylase
detected in semen, blood, urine, feces, and vaginal fluid. (0.5 pt)

13.
True/False: Beta amylase is the type of amylase that is
found in plants. (0.5 pt)

14.
__________________ cells
contain a nucleus. (0.5 pt)

a.
Prokaryotic

b.
Red blood

c.
Eukaryotic

d.
Mitochondrial

15.
The two most important
organelles in forensic DNA analysis are and
the (1 pt).

16.
Describe DNA for a jury (In
other words keep it SHORT and SIMPLE! It’s 11:30 am and they just put you on
the stand. I’m a bored juror with a high
school education and I’m hungry! 1 pt).

17.
Humans have ___23___ pairs of
chromosomes. (0.5 pt)

a.
23

b.
28

c.
46

d.
21

18.
Match the type of DNA with the
mode of inheritance (2 pts, mode of inheritance can be used more than once).

19.
DNA is a (0.5 pt):

a.
Lipid

b.
Protein

c.
Carbohydrate

d.
Polymer

20.
Which of the following base
pairs is incorrect (0.5 pt)?

a.
G-C

b.
C-A

c.
A-T

d.
T-A

21.
True/False: DNA is single stranded
and RNA is double stranded. (0.5 pt)

22.
Transcribe the following DNA
sequence into mRNA (0.5 pt):

5’-TACGATTGCTATGCCATC-3’

3’-AUGCUAACGAUACGGUAG-5’

______________________________________

umuc biol320 final exam latest 2015 winters code.jpg”>Which of the
following is the resulting polypeptide following translation of the mRNA into
amino acids (1 pt)?

a.
Arg-Met-Leu-Ile-Met-STOP

b.
Met-Leu-Thr-Ile-Arg-STOP

c.
Leu-Thr-Met-Arg-Ile-STOP

d.
Met-Leu-Ile-Thr-Arg-STOP

.

23.
The diagram below shows a Quantifiler
RT-PCR reaction with the cycle number going across the x-axis. The green line represents an arbitrary
threshold and each curved line represents the amplification of a sample. Which sample has more DNA (0.5 pt)?

a.
Sample A

b.
Sample B

c.
Sample C

umuc biol320 final exam latest 2015 winters code.jpg” alt=”Final exam qf question”>

24.
List and describe the 3 main
steps of PCR for a jury (1.5 pts). You are in the same situation as question
16.

25.
PCR is a technique that (0.5
pt):

a.
Molecularly copies DNA

b.
Requires primers and enzymes to
amplify DNA

c.
Can amplify many different DNA
sequences all at the same time

d.
A and B

e.
A and C

f.
A, B, and C

26.
What does CODIS stand for? What is its purpose? (1 pt)

.

27.
An investigator has submitted a
condom to your laboratory for testing following an alleged rape. After being caught in the act, the suspect
reportedly tried to swallow the condom as he fled the scene. The suspect’s attempt to swallow the condom
was unsuccessful and he spit it out. The
condom was immediately collected and submitted to you. What type of serology tests would you
perform? (1 pt)

28.
List and describe the three
main steps of STR testing (DNA analysis). (3 pts)

29.
Save file with your name in the
extension and submit to assignments folder. (1 pt)

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