Tp synthesis in glycolysis: -level phosphorylation

the atp that is generated in glycolysis is produced by substrate-level phosphorylation, a very different mechanism than the one used to produce atp during oxidative phosphorylation. phosphorylation reactions involve the addition of a phosphate group to another molecule.

sort the statements into the appropriate bin depending on whether or not they correctly describe some aspect of substrate-level phosphorylation in glycolysis.

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The ATP that is generated in glycolysis is produced by substrate-level phosphorylation, a very different mechanism than the one used to produce ATP during oxidative phosphorylation. Phosphorylation reactions involve the addition of a phosphate group to another molecule.

Sort the statements into the appropriate bin depending on whether or not they correctly describe some aspect of substrate-level phosphorylation in glycolysis.

-One of the substrates is a molecule derived from the breakdown of glucose

-An enzyme is required in order for the reaction to occur

-A bond must be broken between an organic molecule and phosphate before ATP can form.

-The phosphate group added to ADP to make ATP comes from free inorganic phosphate ions.

-The enyzmes involved in ATP synthesis must be attached to a membrane to produce ATP.

The correct statements are , Statements 1,2&3.

The incorrect statements are 4&5.

Explanation: Statement 1 is correct because the two substrates involved in substrate-level phosphorylation in glycolysis are 1,3-bisphosphoglycerate and phosphoenolpyruvate which are both derived from the breakdown of glucose.

Statement 2 is correct because enzymes are required in both of the reactions. The enzymes are phosphoglycerate kinase and pyruvate kinase.

Statement 3 is correct because the bond between the substrates (organic molecules) and the phosphate groups must be be broken first before the phosphate groups are linked to  ADP to form ATP.

Statement 4 is incorrect because the phosphate added to ADP to form ATP are not free inorganic phosphates but are bound to the substrates, 1,3-bisphosphoglycerate and phosphoenolpyruvate.

Statement 5 is incorrect because substrate-level phosphorylation involve soluble enzymes. Both phosphoglycerate kinase and pyruvate kinase are soluble and not membrane-bound enzymes found in the cytosol of glycolytic cells.

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