chapter 1

Question 1

NADH and FADH₂ are the reduced forms of the electron carriers and that NAD⁺ and FAD are the?

Glucose and fatty acid alkane units are also reduced biomolecules

Answer 1

• oxidized forms

Question 2

most protein-protein and protein-ligand interactions are noncovalent, meaning that they are generally driven by a combination of?

Answer 2

• steric interactions and charge-driven interactions

Question 3

what is acetylation of lysine?

Answer 3

• the addition of an acetyl group to the basic N of lysine’s side group removes its positive charge and by doing so, it weakens the interaction between a histone and the DNA that it organizes. when repeated over seceral lysine units, the cumulative effect of acetylation is to loosen the DNA, creating more space for transcription factors to actively transcribe the DNA
  
  • associated with upregulated gene expression