Biochem Exam 1

Phosphoric Acid

H3PO4

Intermolecular forces that helps DNA double helices stick together

Hydrogen bonds and Van der Waals

Metal ion that is found in carbonic anhydrase

Zn2+

Average weight of Amino Acid

110 Da (g/mol)

Protonated

gained H+

Deprotonated

lost h+

The mitochondrion is the location of many reductive reactions, generally. True or false

False

pKa greater than pH

protonated

pKa less than pH

deprotonated

Henderson Hasselbach equation

pH = pKa + log [A-]/[HA]

Buffer consists of both a proton donor and a proton acceptor in solution. True or false

True

Name a protein that copper is found in

Cytochrome C oxidase

Superoxide Dismutase

Ceruloplasmin

Protein primary structure is the linear sequence of amino acids. true or false

True

Which eukaryotic organelle has ribosomes attached?

rough endoplasmic reticulum

What is the one letter code for tryptophan?

W

Benzene...

Has a higher boiling point than methane

Van der Waals interactions

Are weaker than covalent bonds

Are weaker than hydrogen bonds

Occur at distances of 3-4 angstroms

Hydrophobic effect is an important driving force for protein folding. True or false

True

Disulfide bonds

contain a bond between two sulfur atoms

are more oxidized than free thiols

Valine

Is considered a hydrophobic amino acid

Has two pKa values for the free amino acid

In a titration curve for a weak acid when the pH corresponding to half of the first equivalence point is reached,

The acid concentration is equal to that of the conjugate base

There are two species present in solution

The lower the pKa value the weaker the acid. True or false

False

Ferritin does not have any beta sheets. true or false

True

Beta sheets have hydrogen bonds between the i and the i+4 residues. true or false

false

The amino acid glycine must be supplied as a dietary additive. true or false

false

PKU is caused by the inability to metabolize tyrosine. True or false

false

The peptide bond

Give rise ultimately to protein secondary structure

Forms from the condensation reaction of a carboxylate group and an amine group

Glycogen

Polymer of glucose molecules