Problems/Homework 01- MOLB 3610

C12H24O12

Which of the following is most likely to be a carbohydrate?

Tertiary

_________ structures of a protein can be held together by BOTH electrostatic AND hydrophobic interactions.

10^4

Aspirin (acetylsalicyclic acid) has a pKa of 3.4. What is the ratio of [A-] to [HA] at pH of 7.4 (the pH of blood)?

R-groups of the Phe and Val

Hydrogen-bonding is an attractive force between all of the following EXCEPT_____________

Tertiary

Interactions between amino acid R-groups determine___________

a five carbon (pentose) sugar, one or more phosphate groups, a nitrogen containing base.

A nucleotide consists of... (Choose ALL that apply.)

Ammonia (NH3)

Choose the substance below that will have the strongest intermolecular interaction with (i.e. be most soluble in) water.

Tertiary, Primary

Covalent bonds are or can be an interaction in protein___________structures

Oxygen of first amino acid and hydrogen of second amino acid, Carbon of first amino acid and nitrogen of second amino acid.

Peptide bonds form between two amino acids (aa) when the

Electrostatic interactions, Hydrophobic interactions, Dispersion forces

Phospholipids interact with each other via _________ to make a lipid bilayer (part of the membrane).

dehydration

Polymers are made by____________ reactions

Ionic interaction>dipole-dipole interaction>van der Waals force

Select the answer below that correctly lists from strongest to weakest.

Glu

Which of the following amino acids are considered polar charged at physiological pH? (You may use the structures below, which will be provided on the exam and are under the modules section for your reference, to answer this question.)

Choice C above

Which of the following best represents the structure of an amino acid

phosphoric acid (pKa=2.1)

Which of the following would be the most ionized (under standard physiological conditions)?