Biochemistry Answers

. Which of the following are the interactions between substrate and active site of an enzyme?
1. Hydrogen bonding. 2. Van der Waals forces. 3. Hydrophobic interactions. 4. All of the above

Selective qualities of an enzyme are collectively recognized as its_______.
1. rate of reaction 2. active site 3. specificity 4. inhibition

While creating a permanent on a student, a hairdresser accidentally spills some ammonium thioglycolate (also known as perm salt) onto the student’s skin. Ammonium thioglycolate reduces disulphide bonds, which are formed by which amino acid?
1. Methionine. 2. Threonine. 3. Cysteine. 4. Serine.

The α-carbon of an amino acid (except for glycine) is chiral because_____.

1. it is bonded to four different chemical groups in a tetrahedral arrangement 2. it has no net charge 3. it contains a carboxylic acid group 4. it is symmetrical

Which of the following methods is typically used to determine the size of a protein?

1. Isoelectric focusing 2. Agarose gel electrophoresis 3. Affinity chromatography 4. Polyacrylamide gel electrophoresis

Ion-exchange chromatography is a method that can be used to purify proteins on the basis of _____.
1. size 2. hydrophobicity 3. charge 4. primary structure

The lone pair of electrons on the oxygen atom of a H2O molecule______.

1. makes water a good solvent for nonpolar molecules 2. gives the oxygen atom a partial positive charge 3. gives water a low dielectric constant 4. allows water to form hydrogen bonds

Strawberry cells are octoploid(each cell contains eight sets of chromosomes),banana cells are triploid(each cell contains three sets of chromosomes). Which do you think will have more DNA- 5g of strawberry or 5g of banana I just cant figure it out

Which is a qualitative measurement?

write an Adair equation of a protein with four identical, equivalent and independent sites