Cell Biology Questions
Explore questions in the Cell Biology category that you can ask Spark.E!
Which process in eukaryotic cells will proceed normally whether oxygen (O2) is present or absent?A) electron transportB) glycolysisC) the citric acid cycleD) oxidative phosphorylationE) chemiosmosis
Which of the following statements describes the results of this reaction?C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + EnergyA) C6H12O6 is oxidized and O2 is reduced.B) O2 is oxidized and H2O is reduced.C) CO2 is reduced and O2 is oxidized.D) C6H12O6 is reduced and CO2 is oxidized.E) O2 is reduced and CO2 is oxidized.
Where does glycolysis occur?A. MitochondriaB. CytoplasmC. NucleusD. Rough ERE. Smooth ER
In glycolysis, for each molecule of glucose oxidized to pyruvateA) two molecules of ATP are used and two molecules of ATP are produced.B) two molecules of ATP are used and four molecules of ATP are produced.C) four molecules of ATP are used and two molecules of ATP are produced.D) two molecules of ATP are used and six molecules of ATP are produced.E) six molecules of ATP are used and six molecules of ATP are produced.
Which of the following normally occurs regardless of whether or not oxygen (O2) is present?A) glycolysisB) fermentationC) oxidation of pyruvate to acetyl CoAD) citric acid cycleE) oxidative phosphorylation (chemiosmosis)
When a glucose molecule loses a hydrogen atom as the result of an oxidation-reduction reaction, the molecule becomesA) hydrolyzed.B) hydrogenated.C) oxidized.D) reduced.E) an oxidizing agent.
In addition to ATP, what are the end products of glycolysis?A) CO2 and H2OB) CO2 and pyruvateC) NADH and pyruvateD) CO2 and NADHE) H2O, FADH2, and citrate
Which of the following produces the most ATP when glucose (C6H12O6) is completely oxidized to carbon dioxide (CO2) and water?A) glycolysisB) fermentationC) oxidation of pyruvate to acetyl CoAD) citric acid cycleE) oxidative phosphorylation (chemiosmosis)
When a molecule of NAD+ (nicotinamide adenine dinucleotide) gains a hydrogen atom (not a proton), the molecule becomesA) dehydrogenated.B) oxidized.C) reduced.D) redoxed.E) hydrolyzed.
What is the term for metabolic pathways that release stored energy by breaking down complex molecules?A) anabolic pathwaysB) catabolic pathwaysC) fermentation pathwaysD) thermodynamic pathwaysE) bioenergetic pathways
Which side of the inner mitochondrial membrane would have a higher pH?
what is the final common pathway for the oxidation of fuel molecules
Most fuel molecules enter the cycle as....
Where in the cell is glucose used or produced?
The link reaction and Krebs cycle occur in the cytoplasm of prokaryotes in the same way that they occur in the mitochondria of eukaryotes. However, a concentration gradient across a membrane is a requirement of the electron transport chain. Propose an alternative site for that phase of cellular respiration in prokaryotic cells.
Substrate level phosphorylation is the term used for phosphorylation that removes a phosphate from one molecule and joins it to another molecule. Oxidative phosphorylation is the term used for the attachment of free inorganic phosphate to a molecule. Identify the phases of cellular respiration that use substrate level phosphorylation and that use oxidative phosphorylation.
In which phases is glucose used or produced?
Considering all the stages of cellular respiration (glycolysis, link, Krebs cycle, and oxidative phosphorylation) how many ATP molecules are produced from one glucose molecule, assuming ideal circumstances?
During glycolysis the enzyme hexokinase uses ATP to transfer a phosphate to glucose to form fructose-diphosphate. Suppose that a cell has only glucose available for energy and that the activity of hexokinase is suddenly stopped. Explain in detail what is most likely to occur in the cell.
what are those electrons used as an output of TCA