which of the following is a coenzyme associated with cellular respiration? a. nad+ b. o2 c. fad d....
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Which of the following is a coenzyme associated with cellular respiration?
A. NAD+ B. O2 C. FAD D. both A and C ___
Since glucose is a high-energy molecule and its metabolites, CO2 and H2O are low-energy molecules, the breakdown ofglucose would be described as an _____ reaction.
A. exergonic B. endergonic
___
NAD+ is _____ when it accepts two electrons and a hydrogen ion (H+).
A. reduced B. oxidized
___
About _____ of the energy in glucose is transformed into ATP.
A. 5% B. 40% C. 75% D. 100%
___
Which of the following statements correctly describes glycolysis?
A. Glycolysis occurs in the mitochondria. B. glycolysis requires O C. Glycolysis produces two molecules of pyruvate. D. all of the above
___
Which of the following is not a product of the complete breakdown of glucose?
A. O2 B. CO2 C. ATP D. H2O
___
The first phase of glucose metabolism is _____.
A. the Krebs cycle B. glycolysis C. the electron transport system D. the transition reaction
___
The coenzymes NAD and FAD carry electrons to the _____.
A. nucleus B. Krebs cycle C. plasma membrane D. electron transport system ___
Since it is universally found in organisms, researchers believe_____ evolved first.
A. the electron transport system B. Krebs cycle C. glycolysis ___
The inputs of glycolysis include _____.
A. glucose B. NAD+ C. ATP D. all of the above ___
When a phosphate is transferred from a high-energy molecule containing a phosphate group to ADP to form ATP it's referred to as _____. A. photophosphorylation B. substrate-level phosphorylation C. oxidative phosphorylation
___
Glycolysis occurs in the _____.
A. cytosol B. matrix C. cristae D. nucleus
___
There is/are _____ pyruvate molecule(s) produced per glucose molecule during glycolysis.
A. one B. two C. six D. ten
___
If oxygen is not available _____ follows glycolysis.
A. fermentation B. the transition reaction C. the Krebs cycle D. the electron transport system
___
When oxygen is available, pyruvate enters the _____.
A. nucleus B. chloroplast C. plasma membrane D. mitochondria ___
Each of the two pyruvates produced during glycolysis has _____ carbons.
A. 3 B. 6 C. 12 D. 36
___
Which of the following is NOT a product (an output) of glycolysis?
A. NADH B. pyruvate C. CO2 D. ATP
___
The "after taxes" (net gain) number of ATP produced during glycolysis is _____.
A. 1 B. 2 C. 4 D. 32
___
The ATP produced during glycolysis are produced by _____.
A. substrate-level phosphorylation B. oxidative phosphorylation C. photophosphorylation
___
The enzymes of the transition reaction and Krebs cycle are located in the _____.
A. cytosol B. matrix C. cristae D. thylakoids
___
The __________ connects glycolysis to the Krebs cycle.
A. electron transport system B. transition reaction C. cristae D. mitochondrial intermembrane
___
When electrons are removed from pyruvate in the transition reaction, they are accepted by _____.
A. acetyl Co-A B. FAD C. NAD+ D. ATP
___
Acetyl Co-A is formed during the transition reaction by attaching _____ to a two-carbon acetyl group.
A. NAD+ B. coenzyme A C. pyruvate D. oxaloacetate
___
The first metabolite of the Krebs cycle is __________.
A. lactate B. pyruvate C. oxaloacetate D. citrate ___
Which of the following is an output of the Krebs cycle?
A. CO2 B. ATP C. FADH2 D. all of the above ___
Which of the following Krebs cycle products is disposed of by our respiratory system when we exhale?
A. CO2 B. ATP C. NADH D. FADH2
___
The electrons that enter the electron transport system are carried there by _____.
A. NADH B. FADH2 C. both A and B ___
The energy released by the electron transport system produces ATP by _____.
A. photophosphorylation B. substrate-level phosphorylation C. oxidative phosphorylation ___
The electron transport system is located in the _____.
A. stroma B. matrix C. cytosol D. cristae ___
When O2 is reduced during the electron transport system, _____ is produced.
A. H2O B. CO2 C. ADP D. glucose
___
When NADH produced during the transition reaction and Krebs cycle delivers electrons to the electron transport system,_____ ATP is/are produced.
A. 1 B. 2 C. 3 D. 36
___
The final electron acceptor in the electron transport system is _____.
A. FADH2 B. O2 C. coenzyme Q D. cytochrome b
___
How many ATP molecules are produced when FADH2 delivers electrons to the electron transport system?
A. 1 B. 2 C. 4 D. 36
___
Oxygen debt is _____.
A. the amount of oxygen needed to get rid of lactate B. the amount of oxygen needed for cellular respiration C. the amount of oxygen needed for glycolysis D. the amount of oxygen the US owes Japan
___
Animal cells perform _____ fermentation.
A. lactate (lactic acid) B. alcoholic C. both A and B
___
The product of alcoholic fermentation that allows us to make bread is _____.
A. O2 B. CO2 C. H2O D. lactate
___
During fermentation, _____ is regenerated and it returns to glycolysis to pick up more electrons.
A. ATP B. glucose C. NAD+ D. pyruvate
___
Athletes' cells _____.
A. metabolize more fats for ATP which maintains blood glucose levels B. have the same number of mitochondria as a "couch potato" C. produce large quantities of lactate and H+ D. all of the above
___
Metabolites of glycolysis and the Krebs cycle can be converted to _____.
A. amino acids B. glycerol C. fatty acids D. all of the above ___
Catabolism _____.
A. breaks down molecules B. tends to be exergonic C. drives anabolism D. all of the above ___
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