BIO 305 NEW EXAM QUESTIONS AND ACCURATE ANSWERS
100% VERIFIED
Phosphodiester bonds are present in - ANSWER DNA & RNA
Triose phosphate isomerase enzyme has - ANSWER 8 right handed alpha helices and 8
parallel beta sheets.
Which of the following polysaccharides contain (β 1-->4) linkages? Select all that applies
(negative points for wrong answer). - ANSWER Chitin & Cellulose
The active form of insulin contains - ANSWER Both inter- and intra-chain disulfide
bonds.
In amino acids, D- or L- system is applied to or determined from - ANSWER Backbone
chiral carbon
If the rate constant for the forward reaction is kf, and the rate constant for the reverse
reaction is kr, then for a reaction
A<-----> B, the rate of appearance of B can be given by (Select all that apply, negative
points for wrong answer). - ANSWER -dA/dT
kf[A] - kr[B]
dB/dT
Which of the following is the most oxidized? -. ANSWER Acetaldehyde
Insulin signaling ultimately causes the activation of ____ in liver cells resulting in ____. -.
ANSWER Protein Phosphatase-1; glycogen synthesis
,Which of the following molecules is homopolymer of glucose with beta 1-->4 linkages? -.
ANSWER None of the above. out of options glycogen,chitin, and starch
For a reaction A+B <---> C+D; if at any point if the sign of ΔGactual is positive, the
reaction would proceed - ANSWER to the Left
The shape for curve of oxygen binding to Myoglobin is ___________ and the shape for
curve of oxygen binding to Hemoglobin is _________________ - ANSWER Hyperbolic,
Sigmoidal
Which of the following molecules has the highest solubility? - ANSWER CH3COO-
During Krebs Cycle, the converison of isocitrate to alpha-ketoglutarate is a/an ______
reaction, and involves the coenzyme ____ as a reacant. - ANSWER Oxidative
decarboxylation; NAD+
Which of the following compounds is the most oxidized? - ANSWER Pyruvate
Amino Acid (s) that can intercalate with DNA is/are - ANSWER Phenylalanine
Chargaff rule applies to - ANSWER dsDNA
For every glucose molecule produced, gluconeogenesis consumes: - ANSWER 6 ATP
and 2 NADH
Carbon monoxide has a _____ affinity for HB as compared to oxygen. Binding of CO to
HB ___ its (HB's) affinity for oxygen. - ANSWER higher; increases
Which of the following does NOT act as a substrate for the PDH cycle? - ANSWER
NADH
,If both ∆H < 0 and ∆S < 0 for a reaction A --> B, the reaction is: - ANSWER not enough
info
If the Ka of an acid is really high, and the pKa is really low, it implies that - ANSWER
The acid has a strong tendency to dissociate and give up its H+ ion.
Glycolysis is - ANSWER anaerobic breakdown of glucose, occurring in both bacteria
and eukaryotes.
A protein at the quaternary level of folding - containing intra and inter-chain disulfide
linkages - is treated with a high concentration of BME followed by a prolonged exposure
to oxygen and catalytic amount of BME. From your theoretical knowledge of these
reagents you should be able to predict that - ANSWER The protein would regain its
quaternary folding at the end of such experiment.
Which of the following amino acids is least likely to occur in a beta sheet? - ANSWER
Lysine
A catalyst has no effect on - ANSWER Equilibrium concentrations of reactants and
products
Two of the bypass reactions of gluconeogenesis involve: - ANSWER dephosphorylation
of the metabolite without using it to make ATP.
Liver Cells respond to the hormonal signals from hormones - ANSWER epinephrine,
insulin and glucagon
A pyrimidine with a hydrogen bond acceptor at the middle position is - ANSWER
Cytosine
In an aldopentose, you will determine the D/L form of the sugar from carbon number
_____. - ANSWER 4
, Which of these reactions occurs during glycolysis? (Note that only the major
metabolites are shown) - ANSWER Fructose-6-P -> Fructose-1,6-BP
Fatty acids comprise of - ANSWER A long hydrocarbon chain and a carboxylic acid
A reaction with positive ΔH is - ANSWER Endothermic
Which of the following reactions occurs during glycolysis? (Note that only the major
metabolites are shown) - ANSWER Glucose + ATP → Glucose-6-P + ADP
Conversion of 3-phosphoglycerate to 2-phosphoglycerate is catalyzed by a/an: -
ANSWER Isomerase
A ketopentose has ___ biological forms. - ANSWER 2
Monosaccharides are connected by _________ in polysaccharides. - ANSWER
glycosidic linkages
Two monosaccharide isomers with 4 chiral carbons in which the configuration of all of
chiral carbon are inverted with respect to each other are called as - ANSWER
Enantiomers
Which of the following polysaccharide(s) contain(s) (α 1-->6) linkage? Select all that
applies. - ANSWER Starch & Glycogen
A sulfur-containing amino acid(s) that do not form disulfide bonds is/are: (Note: single
letter codes are given) - ANSWER M only
Chymotrypsin has ____ amino acids in its binding pocket, thereby facilitating the
breakdown of polypeptide chain next to _____. - ANSWER no specific; large/non-polar
100% VERIFIED
Phosphodiester bonds are present in - ANSWER DNA & RNA
Triose phosphate isomerase enzyme has - ANSWER 8 right handed alpha helices and 8
parallel beta sheets.
Which of the following polysaccharides contain (β 1-->4) linkages? Select all that applies
(negative points for wrong answer). - ANSWER Chitin & Cellulose
The active form of insulin contains - ANSWER Both inter- and intra-chain disulfide
bonds.
In amino acids, D- or L- system is applied to or determined from - ANSWER Backbone
chiral carbon
If the rate constant for the forward reaction is kf, and the rate constant for the reverse
reaction is kr, then for a reaction
A<-----> B, the rate of appearance of B can be given by (Select all that apply, negative
points for wrong answer). - ANSWER -dA/dT
kf[A] - kr[B]
dB/dT
Which of the following is the most oxidized? -. ANSWER Acetaldehyde
Insulin signaling ultimately causes the activation of ____ in liver cells resulting in ____. -.
ANSWER Protein Phosphatase-1; glycogen synthesis
,Which of the following molecules is homopolymer of glucose with beta 1-->4 linkages? -.
ANSWER None of the above. out of options glycogen,chitin, and starch
For a reaction A+B <---> C+D; if at any point if the sign of ΔGactual is positive, the
reaction would proceed - ANSWER to the Left
The shape for curve of oxygen binding to Myoglobin is ___________ and the shape for
curve of oxygen binding to Hemoglobin is _________________ - ANSWER Hyperbolic,
Sigmoidal
Which of the following molecules has the highest solubility? - ANSWER CH3COO-
During Krebs Cycle, the converison of isocitrate to alpha-ketoglutarate is a/an ______
reaction, and involves the coenzyme ____ as a reacant. - ANSWER Oxidative
decarboxylation; NAD+
Which of the following compounds is the most oxidized? - ANSWER Pyruvate
Amino Acid (s) that can intercalate with DNA is/are - ANSWER Phenylalanine
Chargaff rule applies to - ANSWER dsDNA
For every glucose molecule produced, gluconeogenesis consumes: - ANSWER 6 ATP
and 2 NADH
Carbon monoxide has a _____ affinity for HB as compared to oxygen. Binding of CO to
HB ___ its (HB's) affinity for oxygen. - ANSWER higher; increases
Which of the following does NOT act as a substrate for the PDH cycle? - ANSWER
NADH
,If both ∆H < 0 and ∆S < 0 for a reaction A --> B, the reaction is: - ANSWER not enough
info
If the Ka of an acid is really high, and the pKa is really low, it implies that - ANSWER
The acid has a strong tendency to dissociate and give up its H+ ion.
Glycolysis is - ANSWER anaerobic breakdown of glucose, occurring in both bacteria
and eukaryotes.
A protein at the quaternary level of folding - containing intra and inter-chain disulfide
linkages - is treated with a high concentration of BME followed by a prolonged exposure
to oxygen and catalytic amount of BME. From your theoretical knowledge of these
reagents you should be able to predict that - ANSWER The protein would regain its
quaternary folding at the end of such experiment.
Which of the following amino acids is least likely to occur in a beta sheet? - ANSWER
Lysine
A catalyst has no effect on - ANSWER Equilibrium concentrations of reactants and
products
Two of the bypass reactions of gluconeogenesis involve: - ANSWER dephosphorylation
of the metabolite without using it to make ATP.
Liver Cells respond to the hormonal signals from hormones - ANSWER epinephrine,
insulin and glucagon
A pyrimidine with a hydrogen bond acceptor at the middle position is - ANSWER
Cytosine
In an aldopentose, you will determine the D/L form of the sugar from carbon number
_____. - ANSWER 4
, Which of these reactions occurs during glycolysis? (Note that only the major
metabolites are shown) - ANSWER Fructose-6-P -> Fructose-1,6-BP
Fatty acids comprise of - ANSWER A long hydrocarbon chain and a carboxylic acid
A reaction with positive ΔH is - ANSWER Endothermic
Which of the following reactions occurs during glycolysis? (Note that only the major
metabolites are shown) - ANSWER Glucose + ATP → Glucose-6-P + ADP
Conversion of 3-phosphoglycerate to 2-phosphoglycerate is catalyzed by a/an: -
ANSWER Isomerase
A ketopentose has ___ biological forms. - ANSWER 2
Monosaccharides are connected by _________ in polysaccharides. - ANSWER
glycosidic linkages
Two monosaccharide isomers with 4 chiral carbons in which the configuration of all of
chiral carbon are inverted with respect to each other are called as - ANSWER
Enantiomers
Which of the following polysaccharide(s) contain(s) (α 1-->6) linkage? Select all that
applies. - ANSWER Starch & Glycogen
A sulfur-containing amino acid(s) that do not form disulfide bonds is/are: (Note: single
letter codes are given) - ANSWER M only
Chymotrypsin has ____ amino acids in its binding pocket, thereby facilitating the
breakdown of polypeptide chain next to _____. - ANSWER no specific; large/non-polar
