Question 1

Which of the following pyruvate dehydrogenase enzymes is correctly paired with the coenzyme that is associated with it?

Accepted Answer

A)  E1: coenzyme A 
B)  E2: thiamine pyrophosphate 
C)  E3: FAD 
D)  E2: NAD+ 
E)  E3: lipoamide 
A)  E1: coenzyme A 
B)  E2: thiamine pyrophosphate 
C)  E3: FAD 
D)  E2: NAD+ 
E)  E3: lipoamide C

Question 2

Any sugar that has a free aldehyde group is called a(n) _____.

Accepted Answer

A)  reducing sugar 
B)  nonreducing sugar 
C)  ketose 
D)  aldohexose 
E)  alditol 
A)  reducing sugar 
B)  nonreducing sugar 
C)  ketose 
D)  aldohexose 
E)  alditol A

Question 3

The process of _____ converts glucose into _____.

Accepted Answer

A)  electron transport; CO2 
B)  glycolysis; pyruvate 
C)  glycogenolysis; glycogen 
D)  gluconeogenesis; glycogen 
E)  glycogen synthesis; pyruvate 
A)  electron transport; CO2 
B)  glycolysis; pyruvate 
C)  glycogenolysis; glycogen 
D)  gluconeogenesis; glycogen 
E)  glycogen synthesis; pyruvate B

Question 4

What is the name for the process that produces ATP from ADP in glycolysis?

Accepted Answer

A)  substrate-level phosphorylation 
B)  oxidative phosphorylation 
C)  autophosphorylation 
D)  glycolytic phosphorylation 
E)  cytosolic phosphorylation 
A)  substrate-level phosphorylation 
B)  oxidative phosphorylation 
C)  autophosphorylation 
D)  glycolytic phosphorylation 
E)  cytosolic phosphorylation

Question 5

What regulatory enzyme of glycolysis is skipped during fructose metabolism?

Accepted Answer

A)  hexokinase 
B)  phosphoglucose isomerase 
C)  phosphofructokinase 
D)  pyruvate kinase 
E)  fructose metabolism does not skip any steps of glycolysis 
A)  hexokinase 
B)  phosphoglucose isomerase 
C)  phosphofructokinase 
D)  pyruvate kinase 
E)  fructose metabolism does not skip any steps of glycolysis

Question 6

Glycolysis forms _____ under either aerobic or anaerobic conditions.

Accepted Answer

The answer of Glycolysis forms _____ under either aerobic or...

Question 7

In the reaction catalyzed by aldolase, the bond broken is between C-3 and C-4 of the substrate. Which functional groups are present on these two carbons (C-3 and C-4) in the products?

Accepted Answer

A)  C-3 becomes an alcohol; C-4 becomes a carboxylic acid. 
B)  C-3 becomes an aldehyde; C-4 becomes a ketone. 
C)  C-3 becomes an aldehyde; C-4 becomes an alcohol. 
D)  C-3 becomes an alcohol; C-4 becomes an aldehyde. 
E)  C-3 becomes a ketone; C-4 becomes an alcohol. 
A)  C-3 becomes an alcohol; C-4 becomes a carboxylic acid. 
B)  C-3 becomes an aldehyde; C-4 becomes a ketone. 
C)  C-3 becomes an aldehyde; C-4 becomes an alcohol. 
D)  C-3 becomes an alcohol; C-4 becomes an aldehyde. 
E)  C-3 becomes a ketone; C-4 becomes an alcohol.

Question 8

Which of the monosaccharides seen below are L sugars?

Accepted Answer

A)  A and B 
B)  A and C 
C)  B and C 
D)  C and D 
E)  A, B and C 
A)  A and B 
B)  A and C 
C)  B and C 
D)  C and D 
E)  A, B and C

Question 9

Triose phosphate isomerase catalyzes a reaction that is most like that of _____.

Accepted Answer

A)  phosphoglycerate mutase 
B)  phosphoglucose isomerase 
C)  hexokinase 
D)  aldolase 
E)  enolase 
A)  phosphoglycerate mutase 
B)  phosphoglucose isomerase 
C)  hexokinase 
D)  aldolase 
E)  enolase

Question 10

The structure below shows a Fischer projection of D-Idose.
  Which of the structures below represents $\beta$-D-Idopyranose?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 11

Why is phosphoglycerate kinase still considered a kinase even though ADP is converted to ATP?

Accepted Answer

A)  The enzyme is freely reversible. 
B)  ATP is the ultimate source of the phosphate that is transferred to ADP. 
C)  The phosphate is transferred in conjunction with an oxidation reaction. 
D)  The reaction is metabolically irreversible. 
E)  None of the above 
A)  The enzyme is freely reversible. 
B)  ATP is the ultimate source of the phosphate that is transferred to ADP. 
C)  The phosphate is transferred in conjunction with an oxidation reaction. 
D)  The reaction is metabolically irreversible. 
E)  None of the above

Question 12

Which of the following is a potent activator of phosphofructokinase in mammals?

Accepted Answer

A)  fructose-6-phosphate 
B)  glucose-6-phosphate 
C)  fructose-2,6-bisphosphate 
D)  fructose-1,6-bisphosphate 
E)  glyceraldehyde-3-phosphate 
A)  fructose-6-phosphate 
B)  glucose-6-phosphate 
C)  fructose-2,6-bisphosphate 
D)  fructose-1,6-bisphosphate 
E)  glyceraldehyde-3-phosphate

Question 13

The _____ sugars are monosaccharides in which a hydroxyl group is replaced with a hydrogen atom.

Accepted Answer

The answer of The _____ sugars are monosaccharides in which...

Question 14

The active site of aldolase contains a Lys residue that forms a(n) _____ and a(n) Asp residue that participates in _____ reactions.

Accepted Answer

A)  amide; acid-base 
B)  Schiff base; acid-base 
C)  secondary amine; acid-base 
D)  amide; isomerization 
E)  Schiff base; isomerization 
A)  amide; acid-base 
B)  Schiff base; acid-base 
C)  secondary amine; acid-base 
D)  amide; isomerization 
E)  Schiff base; isomerization

Question 15

The molecular formula for a monosaccharide is _____.

Accepted Answer

A)  CnH2n+2On 
B)  CnH2nOn. 
C)  CnH2nOn 
D)  CnH2n+2On. 
E)  none of the above 
A)  CnH2n+2On 
B)  CnH2nOn. 
C)  CnH2nOn 
D)  CnH2n+2On. 
E)  none of the above

Question 16

Energy is generated during _____, the breakdown of larger molecules into smaller ones, whereas energy is consumed during _____, the building of larger molecules from smaller ones.

Accepted Answer

A)  reduction reactions; oxidation reactions 
B)  autotrophic reactions; heterotrophic reactions 
C)  catabolic reactions; anabolic reactions 
D)  hydrolysis reactions; condensation reactions 
E)  none of the above 
A)  reduction reactions; oxidation reactions 
B)  autotrophic reactions; heterotrophic reactions 
C)  catabolic reactions; anabolic reactions 
D)  hydrolysis reactions; condensation reactions 
E)  none of the above

Question 17

Which of the following coenzymes is directly responsible for the oxidation of the hydroxyethyl group to the acetyl group?

Accepted Answer

A)  coenzyme A 
B)  thiamine pyrophosphate 
C)  FAD 
D)  NAD+ 
E)  lipoamide 
A)  coenzyme A 
B)  thiamine pyrophosphate 
C)  FAD 
D)  NAD+ 
E)  lipoamide

Question 18

In the following structure, which carbon is the anomeric carbon?

Accepted Answer

A)  A 
B)  B 
C)  C 
D)  D 
E)  E 
A)  A 
B)  B 
C)  C 
D)  D 
E)  E

Question 19

Glucose can be synthesized from noncarbohydrate precursors by______.

Accepted Answer

The answer of Glucose can be synthesized from noncarbohydrate precursors...

Question 20

Amylopectin contains primarily _____ glycosidic bonds with _____ glycosidic bonds as branch points.

Accepted Answer

A) $\alpha$(1$\rightarrow$4); $\alpha$(1$\rightarrow$2) 
B)  $\alpha$(1$\rightarrow$4); $\alpha$(1$\rightarrow$6) 
C)  $\alpha$(1$\rightarrow$4); $\beta$(1$\rightarrow$6) 
D) $\beta$(1$\rightarrow$4); $\alpha$(1$\rightarrow$4) 
E) $\beta$(1$\rightarrow$4); $\alpha$(1$\rightarrow$6) 
A) $\alpha$(1$\rightarrow$4); $\alpha$(1$\rightarrow$2) 
B)  $\alpha$(1$\rightarrow$4); $\alpha$(1$\rightarrow$6) 
C)  $\alpha$(1$\rightarrow$4); $\beta$(1$\rightarrow$6) 
D) $\beta$(1$\rightarrow$4); $\alpha$(1$\rightarrow$4) 
E) $\beta$(1$\rightarrow$4); $\alpha$(1$\rightarrow$6)

Exam 6: Carbohydrates I

Which of the following pyruvate dehydrogenase enzymes is correctly paired with the coenzyme that is associated with it?

Any sugar that has a free aldehyde group is called a(n) _____.

The process of _____ converts glucose into _____.

What is the name for the process that produces ATP from ADP in glycolysis?

What regulatory enzyme of glycolysis is skipped during fructose metabolism?

Glycolysis forms _____ under either aerobic or anaerobic conditions.

In the reaction catalyzed by aldolase, the bond broken is between C-3 and C-4 of the substrate. Which functional groups are present on these two carbons (C-3 and C-4) in the products?

Which of the monosaccharides seen below are L sugars?

Triose phosphate isomerase catalyzes a reaction that is most like that of _____.

The structure below shows a Fischer projection of D-Idose. Which of the structures below represents β\betaβ -D-Idopyranose?

Why is phosphoglycerate kinase still considered a kinase even though ADP is converted to ATP?

Which of the following is a potent activator of phosphofructokinase in mammals?

The _____ sugars are monosaccharides in which a hydroxyl group is replaced with a hydrogen atom.

The active site of aldolase contains a Lys residue that forms a(n) _____ and a(n) Asp residue that participates in _____ reactions.

The molecular formula for a monosaccharide is _____.

Energy is generated during _____, the breakdown of larger molecules into smaller ones, whereas energy is consumed during _____, the building of larger molecules from smaller ones.

Which of the following coenzymes is directly responsible for the oxidation of the hydroxyethyl group to the acetyl group?

In the following structure, which carbon is the anomeric carbon?

Glucose can be synthesized from noncarbohydrate precursors by______.

Amylopectin contains primarily _____ glycosidic bonds with _____ glycosidic bonds as branch points.

The Chemical Foundations of Biochemistry

Nucleic Acids

Proteins I

Proteins Iienzymes

Membranes and an Introduction to Signal Transduction

The Common Catabolic Pathway

Carbohydrates II

Lipids I

Lipids II

Amine Metabolism

Metabolism Integration

Nucleotide Deoxynucleotide Metabolism

Dna Replication, Damage and Repair

Rna Synthesis

Protein

Control of Gene

Determination of Macromolecular Structure

Allosterism and Receptor-Ligand

Designer Proteins and Protein Folding

Biomolecule Purification

Bioinformatics and Omics

Signal

Protein Trafficking

Photosynthesis Nitrogen

Filters

The process of _ converts glucose into _.

The structure below shows a Fischer projection of D-Idose. $The structure below shows a Fischer projection of D-Idose. Which of the structures below represents \beta -D-Idopyranose?$ Which of the structures below represents $\beta$ -D-Idopyranose?

The active site of aldolase contains a Lys residue that forms a(n) _ and a(n) Asp residue that participates in _ reactions.

Energy is generated during _, the breakdown of larger molecules into smaller ones, whereas energy is consumed during _, the building of larger molecules from smaller ones.

Amylopectin contains primarily _ glycosidic bonds with _ glycosidic bonds as branch points.