Project #39317 - Assignment 1

 

Homework Assignment 1

Instructions:  The homework consists of a variety of question types, modeled after the final exam and quizzes.  The homework is worth 40 points. Answer the multiple choice questions by highlighting the correct answer; fill in the boxes for table and matching questions; and answer essays after the question.   YOU MUST save the file as Last NameHW1.doc or docx.

 

Multiple Choice:  Each correct answer is worth one points

1)     1.     The pH of a solution is the measure of the number of protons (H+) in a solution made up of water.

a)     True 

b)     False

2)     If a buffer is prepared to maintain the pH of a solution around 5.  Which of the following answers are correct. (pick all that apply).

a)     adding a large amount of acid will decrease the pH slightly.

b)     adding a large amount of base will increase the pH slightly.

c)     adding a small  amount of acid will increase the pH slightly.

d)     adding a small amount of base will increase the pH greatly.

3)     Which of the following is an incorrect statement concerning bonding?

a)     covalent bonds involve the sharing of electrons between atoms.

b)     ionic bonds involve interactions between negatively and positively charged ions.

c)     in water, hydrogen bonds are formed between hydrogen having a slightly negative charge and oxygen having a slightly positive charge in water.

d)     All the statements are correct.

4)     Nucleotides contain what kind of sugars?

a)     three-carbon

b)     four-carbon

c)     five-carbon

d)     six-carbon

5)     The cell membrane is composed of ___________ arranged as a           _______________.

a)     phospholipids; lipid bilayer

b)     triglycerides; micelle

c)     phospholipids; fat globule

d)     phospholipids; micelle

6)     Which organelles are important in human identification (Pick all that apply)?

a)     nucleus

b)     golgi apparatus

c)     mitochondria

d)     endoplasmic reticulum

7)     If the atomic number of an element is 10, then a singly negative charge ion of this element will have ____  ?

a)     11 neutron

b)     9 protons

c)     9 electrons

d)     11 electrons

8)     Which of the following is not potentially part of a eukaryotic chromosome?

a)     histone

b)     sister chromatid

c)     centromere

d)     none of the above

9)     DNA contains all of the following nitrogen-containing bases EXCEPT…

a)     adenine

b)     thymine

c)     guanine

d)     uracil

10)  DNA polymerase assembles new strands…

a)     in a 5’ to 3’ direction only.

b)     in a 5’ to 3’ direction building one strand and a 3’ to 5’ direction  building in the other strand.

c)     in a 3’ to 5’ direction building the first half of a strand and a 5’ to 3’ direction building the second half of a strand.

d)     in a 3’ to 5’ direction only.

11)  Which of the following is not true of mutations?

a)     They may eventually cause cancer.

b)     They can occur as DNA replication errors.

c)     They always lead to a lethal event.

d)     If in eggs or sperm they pass to the next generation.

12)  A stretch of DNA that can specify a sequence (more than one) of amino acids is called a(n):

a)     codon

b)     intron

c)     exon

d)     photon

13)  The form of RNA that carries the code from DNA to the site of protein assembly is called:

a)     nuclear RNA.

b)     transfer RNA.

c)     messenger RNA.

d)     ribosomal RNA.

14)  A gene mutation:

a)     may arise spontaneously

b)     may be caused by environmental agents.

c)     is a change in the nucleotide sequence of DNA

d)     is described by all of these.

15)  Which of the following is NOT an example of the result of mitosis:

a)     gamete formation

b)     a group of rooted plant cuttings from a single plant.

c)     identical twins

d)     healing of a wound.

16)  In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have how many chromosomes?

a)     64

b)     16

c)     32

d)     8

Fill in the blank and Matching

17)  In the following list, match the following words:

a)      +NH3—CHR—COO-                             

 

 

carbohydrate

b)     (glycine)20

 

 

fatty acid

c)     C6H12O6

 

 

amino acid

d)     CH3(CH2)16COOH

 

 

polypeptide


18)  Match each cell component with its function.

Cell component

 

 

Function

a)     Mitochondrion

 

 

Associates with the ribosome

b)     Smooth Endoplasmic Reticulum

 

 

ATP by sugar breakdown

c)     Ribosome

 

 

Sorts and ships

d)     Golgi body

 

 

Assembles lipids; other tasks

e)     Rough ER

 

 

Protein synthesis

19)  The following is a table of techniques or instruments used in presumptive and confirmatory testing of evidence. In the column Presumptive or Confirmatory, type P for presumptive and C for confirmatory for human based evidence.

Test/Technique/Instrument

Presumptive or Confirmatory

a)     Mass spectrometry

 

b)     Luminol

 

c)     ABA hematrace card

 

d)     EMIT

 

e)     Amylase test

 

f)      Acid Phosphatase

 

g)     Alternate Light Sources

 

h)     Phenolphthalein

 

20)  Complete the following table regarding red blood cells:

Observation when Anti-A Serum is mixed with whole blood of unknown type

Observation when Anti-B Serum is mixed with Whole Blood of unknown type

What antigen is present

What is the blood type of the whole blood being tested

Red cell Agglutination

No reaction

A

A

No reaction

Red cell Agglutination

 

 

Red cell Agglutination

Red cell Agglutination

 

 

No reaction

No reaction

 

 

21)  Continue completing the table below, determining donation and acceptance of blood transfusions.

Blood Type

Antigen Present

Antibodies Present in Serum

Can donate blood to individuals with this blood type

Can accept blood from individuals with this blood type

A

 

Anti-B

 

 

B

 

 

 

B, AB

AB

None

 

 

 

O

 

 

 

 

a)     Who is the Universal Donor? Why?

b)     Who is the Universal Acceptor? Why?

Essays

22)  Describe the features fingerprint patterns and how are these are used in identification?

 


23)  Distinguish between the words toxin and poison.  In your answer, briefly describe a toxin and a non-toxin poison.

 

24)  Suppose an individual was murdered through bludgeoning. The body was then dropped over a bridge into water. How would you determine that this person was not drowned?

 

25)  Each hour after death, for the first 12 hours, the body temperature falls 0.78°C per hour.  After the first 12 hours, the body loses about 0.39°C per hour until it reaches ambient temperature. Assume a body was dumped outdoors, in had a starting temperature of 20*C, at approximately 0430. When the body was found, it had a temperature of 4.9*C. At approximately what time, using the information provided, was the victim killed?

 

Subject Science
Due By (Pacific Time) 09/07/2014 09:00 am
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