Chapter 10 objectives Flashcards
(73 cards)
All of the following pertain to glycolysis except:
ends with formation of pyruvic acid.
involves reduction of NAD.
degrades glucose to CO2 and H2O.
degrades glucose to CO2 and H2O.
Noncompetitive inhibition is best described as:
end product binding to DNA, blocking enzyme transcription.
substrate binding to enzyme in a regulatory site.
end product binding to enzyme in noncompetitive site.
end product binding to enzyme in noncompetitive site.
Sulfa drugs like Bactrim, given for bacterial infections, inhibit bacteria by blocking folic acid synthesis. The precursor molecule of folic acid is para-amino benzoic acid (PABA). Interestingly, PABA has a structure very similar to a sulfa drug. If a sulfa drug is present, the bacterial enzyme will bind the sulfa drug because of structural similarity. This is an example of:
competitive inhibition.
catabolite repression.
noncompetitive inhibition.
competitive inhibition.
Which of the following is not involved in the step that occurs between glycolysis and the Krebs cycle?
reduction of NAD
pyruvic acid accepts electrons from NADH
decarboxylation of pyruvic acid
pyruvic acid accepts electrons from NADH
A type of cofactor would be:
ribozymes.
vitamins.
metallic ions.
metallic ions.
In which stage of aerobic respiration is water produced?
glycolysis
the electron transport system
the Krebs cycle
the electron transport system
The most likely place where an exoenzyme participates in a chemical reaction is:
within the cell membrane.
outside of the cell.
in cytoplasm.
outside of the cell.
How many carbon dioxide molecules are produced by the complete aerobic breakdown of one glucose molecule?
6
5
3
6
Each FADH2 from the Krebs cycle that enters the electron transport system gives rise to _____ ATP/s.
3
2
4
2
The formation of citric acid from oxaloacetic acid and an acetyl group begins:
the electron transport system.
the Krebs cycle.
oxidative phosphorylation.
the Krebs cycle.
During which of the phases of cellular respiration is the majority of ATP formed?
the Krebs cycle
electron transport system
processing of pyruvic acid for the Krebs cycle
electron transport system
Enzymes that are only produced when substrate is present are termed
conjugated enzymes.
induced enzymes.
exoenzymes.
induced enzymes.
Each NADH that enters the electron transport system gives rise to _____ ATP.
3
24
2
3
When the product of reaction A becomes the reactant of reaction B, this exemplifies this type of metabolic pathway:
cyclic.
linear.
divergent.
linear.
Each of the following are electron carriers except
FAD.
FADP.
NAD.
FADP.
As the electron transport carriers shuttle electrons, they actively pump _____ into the outer membrane compartment, setting up a concentration gradient called the proton motive force.
ATP
hydrogen ions
NADH
hydrogen ions
In which pathway is the most NADH generated?
the electron transport system
the Krebs cycle
glycolysis
the Krebs cycle
An oxidase detection test can be used to identify certain bacteria because they are missing or lack expression of:
ATP synthase.
cytochrome C oxidase.
mitochondria.
cytochrome C oxidase.
Formation of peptide bonds between amino acids to build a polypeptide would be called
catabolism.
glycolysis.
anabolism.
anabolism.
Reduction of nitrogen-oxygen ions and compounds by some bacteria is called:
aerobic respiration.
deamination.
denitrification.
denitrification.
The cell’s metabolic reactions involve the participation of _____ that lower the activation energy needed for the initiation of a reaction.
cofactors
enzymes
coenzymes
enzymes
The process of forming glucose from various metabolic intermediates is called:
phosphorylation.
glycolysis.
gluconeogenesis.
gluconeogenesis.
During aerobic cellular respiration, the final electron acceptor is
nitrate.
oxygen.
pyruvic acid.
oxygen.
Glycolysis uses 2 ATP, produces
ATP without oxygen.
ATP, and requires oxygen.
ATP all without oxygen.
ATP all without oxygen.
