BIOCHEM ACS EXAMPREP 2026 REAL
EXAM QUESTIONS AND COMPLETE
ANSWER KEY GRADED A+
⩥ which amino acids are chiral. Answer: all but glycine
⩥ catabolism characteristics. Answer: oxidative, degradative, produces
atp and reduced coenzymes
⩥ anabolism characteristics. Answer: reductive, synthetics, uses atp and
reduced coenzymes
⩥ what do catalysts do. Answer: lower activation energy barrier by
stabilizing the transition state
⩥ what bonds in ATP are energy stored in. Answer: Phosphoanhydride
bonds
⩥ what reaction releases energy from atp. Answer: hydrolysis
⩥ RNA World hypothesis. Answer: RNA can act as both the information
carrier and biocatalyst
,⩥ properties of water. Answer: hydrogen bonding, net dipole moment,
high melting and boiling point
⩥ importance of directionality in H bonding:. Answer: linear are
stronger
⩥ which are longer: h bonds or covalent bonds. Answer: h bonds
⩥ water is a good solvent for:. Answer: amino acids and peptides, small
alcohols, carbohydrates
⩥ water is a poor solvent for:. Answer: non polar gases, aromatic
moieties, aliphatic chains
⩥ hydrophobic effect. Answer: the ordering of water molecules around
nonpolar substances
⩥ Force between ionic interactions. Answer: F=Q1Q2/er^2
⩥ what does the hydrophobic effect contribute to. Answer: protein
folding, protein-protein association, formation of lipid micelles, and the
binding of steroid hormones to their receptors
⩥ functions of proteins. Answer: catalysis, transport, structure, motion
, ⩥ amino acids with non polar, aliphatic R groups. Answer: glycine,
alanine, proline, valine, leucine, isoleucine, methionine.
⩥ amino acids with aromatic R groups. Answer: phenylalanine, tyrosine,
tryptophan
⩥ amino acids with polar, uncharged R groups. Answer: serine,
threonine cysteine, asparagine, glutamine
⩥ positively charged R groups. Answer: lysine, arginine, histidine
⩥ negatively charged r groups. Answer: aspartate and glutamate
⩥ aspartate pKa. Answer: 3.65 (~4)
⩥ Glutamate pKa. Answer: 4.25 (~4)
⩥ histidine pKa. Answer: 6
⩥ lysine pKa. Answer: 10.53 (~10)
⩥ arginine pKa. Answer: 12.48 (~12)
EXAM QUESTIONS AND COMPLETE
ANSWER KEY GRADED A+
⩥ which amino acids are chiral. Answer: all but glycine
⩥ catabolism characteristics. Answer: oxidative, degradative, produces
atp and reduced coenzymes
⩥ anabolism characteristics. Answer: reductive, synthetics, uses atp and
reduced coenzymes
⩥ what do catalysts do. Answer: lower activation energy barrier by
stabilizing the transition state
⩥ what bonds in ATP are energy stored in. Answer: Phosphoanhydride
bonds
⩥ what reaction releases energy from atp. Answer: hydrolysis
⩥ RNA World hypothesis. Answer: RNA can act as both the information
carrier and biocatalyst
,⩥ properties of water. Answer: hydrogen bonding, net dipole moment,
high melting and boiling point
⩥ importance of directionality in H bonding:. Answer: linear are
stronger
⩥ which are longer: h bonds or covalent bonds. Answer: h bonds
⩥ water is a good solvent for:. Answer: amino acids and peptides, small
alcohols, carbohydrates
⩥ water is a poor solvent for:. Answer: non polar gases, aromatic
moieties, aliphatic chains
⩥ hydrophobic effect. Answer: the ordering of water molecules around
nonpolar substances
⩥ Force between ionic interactions. Answer: F=Q1Q2/er^2
⩥ what does the hydrophobic effect contribute to. Answer: protein
folding, protein-protein association, formation of lipid micelles, and the
binding of steroid hormones to their receptors
⩥ functions of proteins. Answer: catalysis, transport, structure, motion
, ⩥ amino acids with non polar, aliphatic R groups. Answer: glycine,
alanine, proline, valine, leucine, isoleucine, methionine.
⩥ amino acids with aromatic R groups. Answer: phenylalanine, tyrosine,
tryptophan
⩥ amino acids with polar, uncharged R groups. Answer: serine,
threonine cysteine, asparagine, glutamine
⩥ positively charged R groups. Answer: lysine, arginine, histidine
⩥ negatively charged r groups. Answer: aspartate and glutamate
⩥ aspartate pKa. Answer: 3.65 (~4)
⩥ Glutamate pKa. Answer: 4.25 (~4)
⩥ histidine pKa. Answer: 6
⩥ lysine pKa. Answer: 10.53 (~10)
⩥ arginine pKa. Answer: 12.48 (~12)
