BMB Exam 1 – Study Guide, Practice Questions & Revision Notes
Select the true statement.
- The total energy of a system and its surroundings must increase for a reaction to be favorable.
- Beta-sheets are non-repetitive structural elements
- Most alpha helices in proteins are right-handed.
- None of these is true - ANS ✔✔Most alpha helices in proteins are right-handed.
The entropy of a system and its surroundings is constant.
True or False - ANS ✔✔False
In water, two Ca2+ ions will have a higher positive E than two Na+ at the same distance.
True or False - ANS ✔✔True
The third amino acid in this chain can participate in disulfide bonds at physiologic pH and
oxidizing conditions. CH2-CH2-S-CH3
True or False - ANS ✔✔False
Which of these is true regarding events during transcription?
- The alpha and beta phosphates are released as pyrophosphate during this reaction.
- Pyrophosphate that is released during this reaction is immediately hydrolyzed to form two
molecules of inorganic phosphate.
- Polymerization occurs by nucleophilic attack by the 2' hydroxyl of the previous nucleotide on
the incoming nucleotide
- All of these are true. - ANS ✔✔Pyrophosphate that is released during this reaction is
immediately hydrolyzed to form two molecules of inorganic phosphate.
, Select the true statement.
- Chimp hemoglobin and chimp myoglobin are orthologs
- None of these is true.
- Two proteins with similar functions are always considered to be homologs.
- Chimp hemoglobin and human hemoglobin are homologs. - ANS ✔✔Chimp hemoglobin and
human hemoglobin are homologs.
Select the true statement.
- The pH of an aqueous solution is directly proportional to the [H3O+] in that solution - the
more H3O+ present, the higher the pH of the solution will be.
- The dissociation of a weak acid in aqueous solution depends on the pH of the solution, and the
acid's pKa.
- When ∆G for a reaction is zero, the reaction will tend to proceed exclusively in the forward
direction.
- When ∆G for a reaction is negative, the reaction will tend to proceed in the reverse direction. -
ANS ✔✔The dissociation of a weak acid in aqueous solution depends on the pH of the solution,
and the acid's pKa.
In capillaries surrounding your lungs, which of the following is true?
- All of these are true.
- Chloride ion would predominantly enter red blood cells.
- Carbonic anhydrase would be producing carbonic acid in red blood cells.
- HCO3- would predominantly enter red blood cells, become protonated, and eventually
become H2O and CO2. - ANS ✔✔? HCO3- would predominantly enter red blood cells, become
protonated, and eventually become H2O and CO2
The four macromolecules in biologic systems, are lipids, proteins, carbohydrates, and nucleic
acids.
True or False - ANS ✔✔True
Select the true statement.
- The total energy of a system and its surroundings must increase for a reaction to be favorable.
- Beta-sheets are non-repetitive structural elements
- Most alpha helices in proteins are right-handed.
- None of these is true - ANS ✔✔Most alpha helices in proteins are right-handed.
The entropy of a system and its surroundings is constant.
True or False - ANS ✔✔False
In water, two Ca2+ ions will have a higher positive E than two Na+ at the same distance.
True or False - ANS ✔✔True
The third amino acid in this chain can participate in disulfide bonds at physiologic pH and
oxidizing conditions. CH2-CH2-S-CH3
True or False - ANS ✔✔False
Which of these is true regarding events during transcription?
- The alpha and beta phosphates are released as pyrophosphate during this reaction.
- Pyrophosphate that is released during this reaction is immediately hydrolyzed to form two
molecules of inorganic phosphate.
- Polymerization occurs by nucleophilic attack by the 2' hydroxyl of the previous nucleotide on
the incoming nucleotide
- All of these are true. - ANS ✔✔Pyrophosphate that is released during this reaction is
immediately hydrolyzed to form two molecules of inorganic phosphate.
, Select the true statement.
- Chimp hemoglobin and chimp myoglobin are orthologs
- None of these is true.
- Two proteins with similar functions are always considered to be homologs.
- Chimp hemoglobin and human hemoglobin are homologs. - ANS ✔✔Chimp hemoglobin and
human hemoglobin are homologs.
Select the true statement.
- The pH of an aqueous solution is directly proportional to the [H3O+] in that solution - the
more H3O+ present, the higher the pH of the solution will be.
- The dissociation of a weak acid in aqueous solution depends on the pH of the solution, and the
acid's pKa.
- When ∆G for a reaction is zero, the reaction will tend to proceed exclusively in the forward
direction.
- When ∆G for a reaction is negative, the reaction will tend to proceed in the reverse direction. -
ANS ✔✔The dissociation of a weak acid in aqueous solution depends on the pH of the solution,
and the acid's pKa.
In capillaries surrounding your lungs, which of the following is true?
- All of these are true.
- Chloride ion would predominantly enter red blood cells.
- Carbonic anhydrase would be producing carbonic acid in red blood cells.
- HCO3- would predominantly enter red blood cells, become protonated, and eventually
become H2O and CO2. - ANS ✔✔? HCO3- would predominantly enter red blood cells, become
protonated, and eventually become H2O and CO2
The four macromolecules in biologic systems, are lipids, proteins, carbohydrates, and nucleic
acids.
True or False - ANS ✔✔True
