Okay
FR?!
Now that's doing too much
That's crazy
100

When the change in free energy in a reaction decreases (negative), the reaction will be ______?

  1. Endergonic 

  2. Exergonic 

Exergonic

100

In a reaction ΔG is greater than zero, so this means that the reaction will be _____ and _______?

  1. Spontaneous and Exergonic 

  2. Spontaneous and Endergonic

  3. Non-spontaneous and Exergonic 

  4. Non-spontaneous and Endergonic 

Non-spontaneous and Endergonic

100

True or False: Enzymes are catalysts that inhibit reactions?

  1. True 

  2. False 

False

Correct answer: Enzymes are catalysts that speed up a reaction.

100

True or False: Ribosomes are the sight of protein synthesis?

  1. True 

  2. False

True

200

Which of the following structures below is an example of an amphipathic molecule?

  1. Cholesterol 

  2. Miscele 

  3. Proteins

  4. None of the above

Miscele

200

What is the pH of a solution with the concentration of 1x10^-4 M HCl?

  1. 3

  2. 6

  3. 4

  4. 10

4

200

What is the pH of a solution with the concentration of 1x10^-9 M NaOH?

  1. 11

  2. 12

  3. 8 

  4. 9

9

200

What is the pH of a buffer solution of acetic acid and acetate ion with a pKa = 4.86, when 10 mol of acetic acid is titrated with 6 mol of sodium hydroxide?

  1. 5.04

  2. 5.06

  3. 5.01

  4. 5.07

5.04

300

  1. Order the following types of bonds or interactions from most strength (1) to least strength (5):

  2. ______ Ionic interactions 

  3. ______ Van der Waals interactions 

  4. ______ Hydrogen bonds 

  5. ______ Covalent bonds between carbon and hydrogen 

   6. ______ Covalent bonds between oxygen and hydrogen

  1. Order the following types of bonds or interactions from most strength (1) to least strength (5):

  2. ___3___ Ionic interactions

  3. ___5___ Van der Waals interactions 

  4. ___4___ Hydrogen bonds 

  5. ___2___ Covalent bonds between carbon and hydrogen 

   6. ___1___ Covalent bonds between oxygen and hydrogen

300

  1. Consider a solution of sodium phosphate and disodium phosphate, in which the concentrations are [HPO4^2-] = 0.067 M and [H2PO^4-] = 0.17 M, with pKa of 7.42. If 1.0 mL of 0.10 M HCl is added to 99.0 mL of buffer, what is the resulting pH of the buffer solution?

HPO4^2- +H^+ ⇋ H2PO4^-

  1. 7.03

  2. 7.05

  3. 7.01

  4. 7.07

7.01

300

Categorize the following amino acids into their respective groups:

  1. Alanine

  2. Valine 

  3. Leucine 

  4. Isoleucine

  5. Proline

  6. Methionine

  7. Phenylalanine 

  8. Tryptophan 

  9. Serine 

  10. Threonine

  11. Tyrosine 

  12. Cysteine 

  13. Asparagine 

  14. Glutamine 

  15. Aspartic acid 

  16. Glutamic acid 

  17. Histidine 

  18. Lysine 

  19. Arginine 

  • Nonpolar:

  • Polar-neutral:

  • Acidic: 

  • Basic:

 

Categorize the following amino acids into their respective groups:

  1. Alanine

  2. Valine 

  3. Leucine 

  4. Isoleucine

  5. Proline

  6. Methionine

  7. Phenylalanine 

  8. Tryptophan 

  9. Serine 

  10. Threonine

  11. Tyrosine 

  12. Cysteine 

  13. Asparagine 

  14. Glutamine 

  15. Aspartic acid 

  16. Glutamic acid 

  17. Histidine 

  18. Lysine 

  19. Arginine 

  • Nonpolar: (1-8)

  • Polar-neutral: (9-14)

  • Acidic: (15, 16) 

  • Basic: (17-19)

 

300

A triprotic acid has _____ pKas associated with it.

  1. One 

  2. Two 

  3. Three

  4. Wait, come again?

Three

400

Utilizing the chart below, what is the pI of Glutamine?

  1. 5.45

  2. 5.70

  3. 5.65

  4. 5.67

5.65

400

Which group does each of the primary amino acids fall into?

  1. Nonpolar 

  2. Polar 

  3. Acidic 

  4. Basic 

Nonpolar

400

True or false: The isoelectric point describes the pH at which one proton has been lost?

  1. True 

  2. False 

False

Correct answer: The isoelectric point describes the pH at which the protein is electrically neutral.

400

A sample of an unknown protein was divided into two aliquots. One aliquot was treated with trypsin; the other was treated with cyanogen bromide. Given the following sequences (N-terminal to C-terminal) of the resulting fragments, deduce the sequence of the original peptide.

Trypsin treatment

NMCAWNR

QT

NEAMYFK

ESAK

Cyanogen Bromide

CAWNRNEAM

ESAKNM

YFKQT

ESAKNMCAWNRNEAMYFKQT

500

What is the isoelectric point of Histidine?

  1. 7.55

  2. 7.50

  3. 7.59

  4. 7.65




7.59

M
e
n
u