The poison, sodium cyanide, inhibits the enzyme cytochrome c oxidase. Why is ingestion of this poison usually fatal?
A) It blocks the production of ATP in the cells.
B) It causes cells to rupture.
C) It changes membrane permeability allowing important molecules to leave the cell.
D) It causes changes in the acetyl-coenzyme A molecule.
Q. 2In the complete oxidation of 1 mol of glucose, how many ATPs are formed?
A) 4-6
B) 8-12
C) 18-24
D) 30-32
Q. 3Which substance is converted into glycogen in the process of glycogenesis?
A) 2-phosphoglycerate
B) glucose-1-phosphate
C) fructose-1-phosphate
D) phosphoglyceraldehyde
Q. 4In the ____, galactose is eventually converted to ____.
A) liver; glucose
B) Kupffer cell; fructose
C) small intestine; glucose
D) chylomicron; glucose
Q. 5Where are the enzymes that catalyze the citric acid cycle located?
A) cytoplasmic matrix
B) endoplasmic reticulum
C) mitochondrial matrix
D) lysosome
Q. 6Two hormones that stimulate glycogenolysis in the muscle and liver, respectively, are ____.
A) cortisol and epinephrine
B) epinephrine and glucagon
C) insulin and epinephrine
D) glucagon and insulin
Q. 7In which cellular site is most of the energy released when carbohydrates are oxidized to carbon dioxide and water?
A) cytoplast
B) endothelium
C) Golgi body
D) mitochondrion
Q. 8In what part of the cell does glycolysis occur?
A) mitochondrion
B) cytosol
C) nucleus
D) endoplasmic reticulum
Quick Reply
