BIOLOGY 100                   SPRING EXAM 7

BIOLOGY 100                   SPRING EXAM 7
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  1. You have a solution in a beaker, and suspended in that solution is a sealed dialysis bag that is semi-permeable. In the bag there are .0025g of K3PO4 dissolved in 25 mL of water.  In the beaker there is 220g of K3PO4 dissolved in 1200 mL of water.  What is the percent concentration of the two solutions?  Will the K3PO4 move out of the bag, or into the bag?  Will the water move out of the bag or into the bag?  Explain why.  ALL movement is via passive transport. (10)
  2. You have a piece of DNA that you see below. What would the piece of mRNA look like that is produced from this piece of DNA.  What would the polypeptide look like that is produced from the mRNA? (8)
  3. In the piece of DNA above, you change the first codon from TAC to TAG. What would this mutation do to the process of Translation?  (6)
  4. We can use carbohydrates, lipids and proteins as an energy source. If we have a meal with all starch, protein and saturated fats in it, how do these different molecules have to be changed before they can be used, and where do they enter the metabolic pathways? (12)
  5. You have been exercising to burn off nervous energy related to this exam. The next morning you have very sore muscles.  Explain what occurred in your cells to produce the sore muscles and what happened for the muscles to lose their soreness and return to normal. (6)
  6. You are lactose intolerant.  Your friend (their baaaaaack) knows this and tells you that you should take some of the sucrase that he has because it will fix the problem.  Since you have studied this kind of problem, explain to your friend the chemical DETAILS as to why sucrase will not help your lactose intolerance. (8)

Bonus Question: The discovery of the structure of the DNA won James Watson and Francis Crick a Nobel Prize.  Who was the 3rd person that won the Nobel Prize along with Watson and Crick?

 

  • This exam is due by noon on Tuesday May 3rd
  • All parts of the exam must be typed with the exception of calculations or drawings
  • Plagiarism on any part of the exam will result in a zero on the entire exam.
  • Make sure that the work is organized, and easy to find
  • The exam is limited to 5 pages with standard fonts and margins.
  • The exam must be submitted via the assignment section of blackboard

mRNA codon chart

 

  

U

 

C

 

A

 

G

 
 

U

Phe

Phe

Leu

Leu

Ser

Ser

Ser

Ser

Tyr

Tyr

Stop

Stop

Cys

Cys

Stop

Trp

U

C

A

G

 

C

Leu

Leu

Leu

Leu

Pro

Pro

Pro

Pro

His

His

Gln

Gln

Arg

Arg

Arg

Arg

U

C

A

G

 

A

Ile

Ile

Ile

Met

Thr

Thr

Thr

Thr

Asn

Asn

Lys

Lys

Ser

Ser

Arg

Arg

U

C

A

G

 

G

Val

Val

Val

Val

Ala

Ala

Ala

Ala

Asp

Asp

Glu

Glu

Gly

Gly

Gly

Gly

U

C

A

G

 

 

(A) ALA – Alanine(P) PRO – Proline(Y) TYR – Tyrosine
(R) ARG – Arginine(M) MET – Methionine(N) ASN – Asparagine
(D) ASP – Aspartic Acid(F) PHE – Phenylanine(Q) GLN – Glutamine
(C) CYS – Cysteine(W) TRP – Tryptophan(K) LYS – Lysine
(V) VAL – Valine(G) GLY – Glycine(H) HIS – Histidine
(L) LEU – Leucine(S) SER – Serine(E)GLU – Glutamic Acid
(I) ILE – Isoleucine(T) THR – Threonine 

 

 

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