Question 1

Which of the following is considered to be a waste product of photosynthesis?

Accepted Answer

A)  H2O 
B)  CO2 
C)  O2 
D)  none of these 
A)  H2O 
B)  CO2 
C)  O2 
D)  none of these

Question 2

How many of the fatty acids which the body needs is it unable to synthesize?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 3

Which of the following are the precursors of phosphatidylcholines?

Accepted Answer

A)  cholinates 
B)  cholinesterates 
C)  phosphatidates 
D)  triphosphates 
A)  cholinates 
B)  cholinesterates 
C)  phosphatidates 
D)  triphosphates

Question 4

The dark reactions of photosynthesis consume which of the following?

Accepted Answer

A)  carbon dioxide 
B)  water 
C)  both a and b 
D)  neither a nor b 
A)  carbon dioxide 
B)  water 
C)  both a and b 
D)  neither a nor b

Question 5

Which of the following is the starting material for the Cori cycle?

Accepted Answer

A)  lactate 
B)  malate 
C)  oxaloacetate 
D)  pyruvate 
A)  lactate 
B)  malate 
C)  oxaloacetate 
D)  pyruvate

Question 6

Which of the following is the reducing agent in the synthesis of glutamate from α-ketoglutarate?

Accepted Answer

A)  FAD 
B)  FADH2 
C)  NADH 
D)  NAD+ 
A)  FAD 
B)  FADH2 
C)  NADH 
D)  NAD+

Question 7

Consider the following reaction sequence.  
-Examine the following reactants.   Which of the following characterizes this reaction?

Accepted Answer

A)  Alanine is a product. 
B)  The reaction is classified as a deamination. 
C)  It produces an essential amino acid. 
D)  All of the above are correct. 
A)  Alanine is a product. 
B)  The reaction is classified as a deamination. 
C)  It produces an essential amino acid. 
D)  All of the above are correct.

Question 8

Prenylation of a protein results in which of the following?

Accepted Answer

A)  the protein becomes more hydrophilic 
B)  the protein becomes more hydrophobic 
C)  protein synthesis is accelerated 
D)  protein synthesis ceases 
A)  the protein becomes more hydrophilic 
B)  the protein becomes more hydrophobic 
C)  protein synthesis is accelerated 
D)  protein synthesis ceases

Question 9

Which of the following amino acids can be synthesized from glutamate?

Accepted Answer

A)  asparagine 
B)  cysteine 
C)  tyrosine 
D)  valine 
A)  asparagine 
B)  cysteine 
C)  tyrosine 
D)  valine

Question 10

Examine the following structure.  
-Which of the following is true when a normal biosynthetic pathway is blocked?

Accepted Answer

A)  The organism can always make the necessary compounds by using the reverse of the blocked synthetic pathway. 
B)  The organism can never make the necessary compounds by using the reverse of the blocked synthetic pathway. 
C)  The organism can often make the necessary compounds by using the reverse of the blocked synthetic pathway. 
D)  The organism will always die. 
A)  The organism can always make the necessary compounds by using the reverse of the blocked synthetic pathway. 
B)  The organism can never make the necessary compounds by using the reverse of the blocked synthetic pathway. 
C)  The organism can often make the necessary compounds by using the reverse of the blocked synthetic pathway. 
D)  The organism will always die.

Question 11

Which of the following can serve as starting material for gluconeogenesis?

Accepted Answer

A)  leucine 
B)  lysine 
C)  tryptophan 
D)  threonine 
A)  leucine 
B)  lysine 
C)  tryptophan 
D)  threonine

Question 12

Which of the following is the cycle which utilizes lactate as the starting material for gluconeogenesis?

Accepted Answer

A)  the Calvin cycle 
B)  the citric acid cycle 
C)  the Cori cycle 
D)  the Krebs cycle 
A)  the Calvin cycle 
B)  the citric acid cycle 
C)  the Cori cycle 
D)  the Krebs cycle

Question 13

Examine the following structure.  
-Which of the following is true of the relationship between anabolic pathways and catabolic pathways?

Accepted Answer

A)  They are always different. 
B)  They are always the same. 
C)  They are usually different. 
D)  They are usually the same. 
A)  They are always different. 
B)  They are always the same. 
C)  They are usually different. 
D)  They are usually the same.

Question 14

Which amino acids can serve as starting material for gluconeogenesis?

Accepted Answer

A)  all of them 
B)  none of them 
C)  only glucogenic amino acids 
D)  only ketogenic amino acids 
A)  all of them 
B)  none of them 
C)  only glucogenic amino acids 
D)  only ketogenic amino acids

Question 15

Which of the following is the oxidizing agent in the conversion of a saturated fatty acid to an unsaturated fatty acid?

Accepted Answer

A)  FADH2 
B)  FADPH2 
C)  NADH 
D)  NADPH 
A)  FADH2 
B)  FADPH2 
C)  NADH 
D)  NADPH

Question 16

Farnesyl pyrophosphate and geranyl pyrophosphate are related to which of the following?

Accepted Answer

A)  alkaloids 
B)  alkanes 
C)  isoprenes 
D)  none of these 
A)  alkaloids 
B)  alkanes 
C)  isoprenes 
D)  none of these

Question 17

UTP has how many high-energy phosphate anhydride bonds?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 18

Consider the following reaction sequence.  
-Which of the following correctly states the relationship among anabolic pathways?

Accepted Answer

A)  They begin with the citric acid cycle. 
B)  They use ATP as an energy source. 
C)  They use the reducing power of NADH and FADH2. 
D)  All of these are correct statements. 
A)  They begin with the citric acid cycle. 
B)  They use ATP as an energy source. 
C)  They use the reducing power of NADH and FADH2. 
D)  All of these are correct statements.

Question 19

Why is dietary cholesterol and cholesterol synthesized in the liver not available for synapse formation?

Accepted Answer

A)  There is a subtle between these cholesterols and the cholesterol synthesized in the nerve cells of the brain. 
B)  LDL cannot cross the blood-brain barrier. 
C)  both a and b 
D)  neither a nor b 
A)  There is a subtle between these cholesterols and the cholesterol synthesized in the nerve cells of the brain. 
B)  LDL cannot cross the blood-brain barrier. 
C)  both a and b 
D)  neither a nor b

Question 20

The synthesis of cholesterol begins with the sequential condensation of how many molecules of acetyl CoA.

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Exam 29: Biosynthetic Pathways

Which of the following is considered to be a waste product of photosynthesis?

How many of the fatty acids which the body needs is it unable to synthesize?

Which of the following are the precursors of phosphatidylcholines?

The dark reactions of photosynthesis consume which of the following?

Which of the following is the starting material for the Cori cycle?

Which of the following is the reducing agent in the synthesis of glutamate from α-ketoglutarate?

Consider the following reaction sequence. -Examine the following reactants. Which of the following characterizes this reaction?

Prenylation of a protein results in which of the following?

Which of the following amino acids can be synthesized from glutamate?

Examine the following structure. -Which of the following is true when a normal biosynthetic pathway is blocked?

Which of the following can serve as starting material for gluconeogenesis?

Which of the following is the cycle which utilizes lactate as the starting material for gluconeogenesis?

Examine the following structure. -Which of the following is true of the relationship between anabolic pathways and catabolic pathways?

Which amino acids can serve as starting material for gluconeogenesis?

Which of the following is the oxidizing agent in the conversion of a saturated fatty acid to an unsaturated fatty acid?

Farnesyl pyrophosphate and geranyl pyrophosphate are related to which of the following?

UTP has how many high-energy phosphate anhydride bonds?

Consider the following reaction sequence. -Which of the following correctly states the relationship among anabolic pathways?

Why is dietary cholesterol and cholesterol synthesized in the liver not available for synapse formation?

The synthesis of cholesterol begins with the sequential condensation of how many molecules of acetyl CoA.

Matter, Energy, and Measurement

Atoms

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Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes and Alkynes

Benzene and Its Derivatives

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

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Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

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