Lecture 1 - 1/3

Question 1

Unity of biochemistry

Answer 1

Similarity in chemistry between all living organisms (e.g. bacteria and elephant)

Question 2

Periplasmic space

Answer 2

gel-like matrix in the space between the cystoplasmic membrane and outer cell wall of prokaryotes

Question 3

Permeability of lipid bilayer

Answer 3

Hydrophobic molecules can pass through

Question 4

Ionic bond

Answer 4

between full positive charge and full negative charge. Not necessarily stronger than all covalent bonds (e.g. NaCl).

Question 5

Polar bonds

Answer 5

between partial positive and partial negative charges (e.g. water)

Question 6

van der Waals forces

Answer 6

found in nonpolar and uncharged molecules, the forces themselves are weak, but are additive

Question 7

hydrophobic interactions

Answer 7

powers protein folding. small non-polar molecules are more likely to be found in between polar-molecules, so the hydrophobic effect would be weaker.

Question 8

isoelectric point

Answer 8

pH at which a particular molecule carries no charge

Question 9

Function of ribonuclease

Answer 9

Degrade/cleaning of RNA that is not longer needed