Question 1

Describe the dual roles of the arginine repressor in the regulation of intracellular arginine levels.

Accepted Answer

The arginine repressor binds to the DNA ...

Question 2

The following is NOT correct regarding unsaturation in certain fatty acids:

Accepted Answer

A)   Temperature regulates fatty acid composition.
B)   The plasma membrane must maintain a certain degree of flexibility.
C)   Low temperature induces expression of fabA, which encodes a dehydratase enzyme.
D)   Low temperatures favor fewer unsaturated fatty acids.
E)   All of the above.F) None of the above
G) All of the above

Question 3

What is/are the advantage(s)  of the Calvin cycle being composed of multiple steps?

Accepted Answer

A)   Energy flow is broken down into numerous reversible conversions.
B)   Reversible conversions with near-zero  Δ\DeltaΔ G values conserve more energy.
C)   It provides substrates for sugar, amino acid, and nucleotide biosynthesis.
D)   All of the above.
E)   None of the above. F) All of the above
G) A) and D)

Question 4

__________ and __________ are unique in that they fix CO2 as their sole carbon source.

Accepted Answer

A)   Organotrophs; iron oxidizers
B)   Photoheterotrophs; chemiolithotrophs
C)   Photoautotrophs; lithotrophs
D)   all of the above
E)   none of the aboveF) A) and D)
G) A) and C)

Question 5

Gene expression of nitrogenase through NtrC is downregulated in high concentrations of:

Accepted Answer

A)   carbon dioxide
B)   nitrogen
C)   nitrate
D)   ammonium
E)   FeMo proteinF) A) and E)
G) B) and C)

Question 6

What kind of reaction is the formation of oxaloacetate from phosphoenolpyruvate?

Accepted Answer

A)   anabolic
B)   anaplerotic
C)   carboxylation
D)   all of the above
E)   none of the aboveF) B) and D)
G) C) and D)

Question 7

Describe how genome scanning can be used to isolate unknown genes whose sequences are related to known genes in other organisms. Why might this be of use medically?

Accepted Answer

Genome scanning is based on two assumpti...

Question 8

The transfer of amino groups between two metabolites such as glutamate and glutamine with regeneration of their corresponding 2-oxoacids is called __________.

Accepted Answer

A)   transamination
B)   desaturation
C)   glycosylation
D)   hydrogenation
E)   none of the aboveF) A) and C)
G) None of the above

Question 9

The following is NOT correct regarding nitrogen assimilation into biomass:

Accepted Answer

A)   Different oxidation states of nitrogen require different amounts of reducing energy.
B)   It is easy for living organisms to assimilate nitrogen due to its great stability (N ≡\equiv≡ N) .
C)   Nitrogen forms must be fully reduced to NH3/ NH.
D)   All of the above.
E)   None of the above. F) A) and C)
G) A) and D)

Question 10

Substrates for biosynthesis of lipids and amino acids derive from the __________ pathways of glycolysis and the TCA cycle.

Accepted Answer

A)   amphibolic
B)   catabolic
C)   anabolic
D)   irreversible
E)   none of the aboveF) C) and E)
G) A) and B)

Exam 15: Biosynthesis

What kind of reaction is the formation of oxaloacetate from phosphoenolpyruvate?

Correct Answer
verified

What is/are the advantage(s) of the Calvin cycle being composed of multiple steps?

Correct Answer
verified

and are unique in that they fix CO₂ as their sole carbon source.

Correct Answer
verified

The following is NOT correct regarding nitrogen assimilation into biomass:

Correct Answer
verified

Describe the dual roles of the arginine repressor in the regulation of intracellular arginine levels.

Correct Answer
verified
The arginine repressor binds to the DNA ...
View Answer

The transfer of amino groups between two metabolites such as glutamate and glutamine with regeneration of their corresponding 2-oxoacids is called __________.

Correct Answer
verified

Describe how genome scanning can be used to isolate unknown genes whose sequences are related to known genes in other organisms. Why might this be of use medically?

Correct Answer
verified
Genome scanning is based on two assumpti...
View Answer

Substrates for biosynthesis of lipids and amino acids derive from the __________ pathways of glycolysis and the TCA cycle.

Correct Answer
verified

Gene expression of nitrogenase through NtrC is downregulated in high concentrations of:

Correct Answer
verified

The following is NOT correct regarding unsaturation in certain fatty acids:

Correct Answer
verified

Exam 15: Biosynthesis

What kind of reaction is the formation of oxaloacetate from phosphoenolpyruvate?

Correct AnswerverifiedShow Answer

What is/are the advantage(s) of the Calvin cycle being composed of multiple steps?

Correct AnswerverifiedShow Answer

__________ and __________ are unique in that they fix CO2 as their sole carbon source.

Correct AnswerverifiedShow Answer

The following is NOT correct regarding nitrogen assimilation into biomass:

Correct AnswerverifiedShow Answer

Describe the dual roles of the arginine repressor in the regulation of intracellular arginine levels.

Correct AnswerverifiedThe arginine repressor binds to the DNA ...View AnswerShow Answer

The transfer of amino groups between two metabolites such as glutamate and glutamine with regeneration of their corresponding 2-oxoacids is called __________.

Correct AnswerverifiedShow Answer

Describe how genome scanning can be used to isolate unknown genes whose sequences are related to known genes in other organisms. Why might this be of use medically?

Correct AnswerverifiedGenome scanning is based on two assumpti...View AnswerShow Answer

Substrates for biosynthesis of lipids and amino acids derive from the __________ pathways of glycolysis and the TCA cycle.

Correct AnswerverifiedShow Answer

Gene expression of nitrogenase through NtrC is downregulated in high concentrations of:

Correct AnswerverifiedShow Answer

The following is NOT correct regarding unsaturation in certain fatty acids:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

and are unique in that they fix CO₂ as their sole carbon source.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The arginine repressor binds to the DNA ...
View Answer

Correct Answer
verified

Correct Answer
verified
Genome scanning is based on two assumpti...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified