Which of the following statements is false regarding amphibolic pathways?
A. Glyceraldehyde-3-phosphate is used as a precursor for amino acid, lipid, and carbohydrate synthesis.
B. Glucose is broken down in glycolysis; however, not all of the intermediates in the pathway are utilized as an energy source. Many leave the pathway to serve as precursors for complex molecules.
C. Metabolic pathways are amphibolic, that is, catabolism and anabolism are intertwined in order to conserve energy in the cell.
D. All organisms use metabolic pathways to synthesize the 20 amino acids necessary for protein synthesis using precursors from catabolic processes.
E. Glucose is broken down during glycolysis to pyruvate; however, when glucose is in short supply, pyruvate is used as a precursor in the process of gluconeogenesis.
Answer: D
You might also like to view...
You inoculate a culture into a test tube containing broth and take it out of the incubator the next day. You see the culture is growing at the bottom of the tube. You conclude the culture must be
A. aerobic. B. anaerobic. C. facultative anaerobe. D. microaerophilic. E. aerotolerant.
Which of the following is NOT true of prokaryotes?
A. They lack a membrane-bound nucleus. B. DNA is located within the cytosol. C. They have a simpler structure relative to eukaryotes. D. They possess membrane-bound organelles. E. They are relatively small compared with eukaryotes.
Subacute encephalitis may be caused by ________.
A. prions B. Toxoplasma gondii C. persistent measles virus D. herpes simplex virus E. All of the choices are correct.
Most ecologists believe that the average global carrying capacity for the human population is between
A) 5 and 6 billion. B) 6 and 8 billion. C) 10 and 15 billion. D) 15 and 20 billion. E) 20 and 25 billion.